Add a GraphQL structured query format (#77)
Summary: See motivation in #76. Feel free to look at the new snapshot file to inspect the structured representation and also the stringified output. This implementation is sufficient to encode our query against the GitHub v4 API; see the test plan below. Test Plan: Unit tests added; run `yarn flow && yarn test`. This code has full coverage except for lines 260, 315, and 380 of `queries.js`; these lines check invariants that should never be violated. You can also use the following steps to verify that the sample query is valid GraphQL that produces the same results as our hand-written query: 1. Apply the following hacky patch: ```diff diff --git a/src/backend/graphql/queries.test.js b/src/backend/graphql/queries.test.js index 52bdec7..c04a636 100644 --- a/src/backend/graphql/queries.test.js +++ b/src/backend/graphql/queries.test.js @@ -3,6 +3,18 @@ import type {Body} from "./queries"; import {build, stringify, multilineLayout, inlineLayout} from "./queries"; +function emitGitHubQuery(layout, filename) { + const fs = require("fs"); + const path = require("path"); + const result = stringify.body(usefulQuery(), layout); + const outputFilepath = path.join(__dirname, "..", filename); + const outputText = `module.exports = ${JSON.stringify(result)};\n`; + fs.writeFileSync(outputFilepath, outputText); + console.log(`Wrote output to ${outputFilepath}.`); +} +emitGitHubQuery(multilineLayout(" "), "githubQueryMultiline.js"); +emitGitHubQuery(inlineLayout(), "githubQueryInline.js"); + describe("queries", () => { describe("end-to-end-test cases", () => { const testCases = { ``` 2. Run `CI=true yarn test`, and verify that the following two files written to `src/backend/` contain appropriate contents. You can just eyeball them, or check that they match my results: https://gist.github.com/wchargin/f37b99fd4ec345c9d2541c2dc53ceda9 3. In `fetchGitHubRepo.js`, change the definition of `const query` to ```js const query = require("./githubQueryMultiline.js"); ``` Run ```shell GITHUB_TOKEN="<your_token_here>" src/backend/fetchGitHubRepoTest.sh ``` and verify that it exits successfully. 4. Repeat for `require("./githubQueryInline.js")`. wchargin-branch: graphql-structured-queries
This commit is contained in:
William Chargin
GitHub
parent
1083540d21
commit
291dcb17c3
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@ -0,0 +1,961 @@
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// Jest Snapshot v1, https://goo.gl/fbAQLP
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exports[`queries complex object stringification should build the object 1`] = `
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Object {
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"data": Object {
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"exampleBoolean": Object {
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"data": true,
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"type": "LITERAL",
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},
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"exampleEnum": Object {
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"data": "WORLD",
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"type": "ENUM",
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},
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"exampleList": Object {
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"data": Array [
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Object {
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"data": 12,
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"type": "LITERAL",
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},
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Object {
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"data": 14,
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"type": "LITERAL",
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},
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Object {
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"data": 16,
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"type": "LITERAL",
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},
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],
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"type": "LIST",
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},
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"exampleNull": Object {
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"data": null,
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"type": "LITERAL",
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},
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"exampleNumber": Object {
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"data": 123,
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"type": "LITERAL",
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},
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"exampleObject": Object {
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"data": Object {
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"roses": Object {
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"data": "red",
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"type": "LITERAL",
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},
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"violets": Object {
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"data": "blue",
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"type": "LITERAL",
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},
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},
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"type": "OBJECT",
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},
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"exampleString": Object {
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"data": "hello",
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"type": "LITERAL",
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},
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"exampleVariable": Object {
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"data": "widget",
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"type": "VARIABLE",
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},
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"nestedList": Object {
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"data": Array [
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Object {
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"data": Array [
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Object {
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"data": "w",
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"type": "LITERAL",
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},
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Object {
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"data": "x",
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"type": "LITERAL",
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},
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],
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"type": "LIST",
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},
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Object {
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"data": Array [
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Object {
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"data": "y",
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"type": "LITERAL",
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},
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Object {
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"data": "z",
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"type": "LITERAL",
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},
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],
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"type": "LIST",
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},
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],
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"type": "LIST",
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},
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"nestedObject": Object {
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"data": Object {
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"english": Object {
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"data": Object {
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"n1": Object {
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"data": "one",
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"type": "LITERAL",
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},
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"n2": Object {
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"data": "two",
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"type": "LITERAL",
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},
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},
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"type": "OBJECT",
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},
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"greek": Object {
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"data": Object {
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"n1": Object {
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"data": "ένα",
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"type": "LITERAL",
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},
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"n2": Object {
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"data": "δύο",
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"type": "LITERAL",
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},
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},
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"type": "OBJECT",
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},
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},
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"type": "OBJECT",
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},
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},
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"type": "OBJECT",
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}
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`;
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exports[`queries complex object stringification should work inline 1`] = `"{ exampleNumber: 123 exampleString: \\"hello\\" exampleBoolean: true exampleNull: null exampleEnum: WORLD exampleVariable: $widget exampleList: [ 12 14 16 ] exampleObject: { roses: \\"red\\" violets: \\"blue\\" } nestedList: [ [ \\"w\\" \\"x\\" ] [ \\"y\\" \\"z\\" ] ] nestedObject: { english: { n1: \\"one\\" n2: \\"two\\" } greek: { n1: \\"ένα\\" n2: \\"δύο\\" } } }"`;
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exports[`queries complex object stringification should work multiline 1`] = `
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"{
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exampleNumber:
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123
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exampleString:
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\\"hello\\"
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exampleBoolean:
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true
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exampleNull:
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null
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exampleEnum:
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WORLD
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exampleVariable:
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$widget
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exampleList:
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[
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12
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14
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16
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]
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exampleObject:
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{
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roses:
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\\"red\\"
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violets:
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\\"blue\\"
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}
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nestedList:
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[
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[
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\\"w\\"
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\\"x\\"
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]
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[
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\\"y\\"
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\\"z\\"
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]
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]
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nestedObject:
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{
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english:
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{
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n1:
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\\"one\\"
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n2:
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\\"two\\"
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}
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greek:
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{
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n1:
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\\"ένα\\"
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n2:
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\\"δύο\\"
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}
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}
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}"
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`;
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exports[`queries end-to-end-test cases for a query using lots of features should build the query 1`] = `
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Array [
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Object {
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"name": "QueryWithParameters",
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"params": Array [
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Object {
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"name": "qp1",
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"type": "String!",
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},
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Object {
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"name": "qp2",
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"type": "String!",
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},
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],
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"selections": Array [
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Object {
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"args": Object {
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"id": Object {
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"data": 12345,
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"type": "LITERAL",
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},
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"name": Object {
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"data": "qp1",
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"type": "VARIABLE",
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},
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},
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"name": "thing",
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"selections": Array [
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Object {
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"args": Object {
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"tasty": Object {
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"data": true,
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"type": "LITERAL",
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},
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"type": Object {
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"data": "APPLE",
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"type": "ENUM",
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},
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},
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"name": "fruit",
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"selections": Array [],
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"type": "FIELD",
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},
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Object {
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"fragmentName": "otherThings",
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"type": "FRAGMENT_SPREAD",
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},
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],
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"type": "FIELD",
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},
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Object {
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"args": Object {},
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"name": "more",
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"selections": Array [
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Object {
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"selections": Array [
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Object {
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"args": Object {},
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"name": "mcguffins",
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"selections": Array [
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Object {
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"args": Object {},
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"name": "quantity",
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"selections": Array [],
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"type": "FIELD",
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},
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],
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"type": "FIELD",
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},
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Object {
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"args": Object {
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"state": Object {
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"data": "SLIMY",
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"type": "ENUM",
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},
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},
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"name": "slime",
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"selections": Array [
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Object {
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"args": Object {},
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"name": "availability",
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"selections": Array [],
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"type": "FIELD",
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},
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],
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"type": "FIELD",
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},
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],
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"type": "INLINE_FRAGMENT",
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"typeCondition": "Widget",
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},
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Object {
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"selections": Array [
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Object {
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"args": Object {
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"attributes": Object {
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"data": Object {
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"shaft": Object {
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"data": null,
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"type": "LITERAL",
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},
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"teeth": Object {
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"data": Array [
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Object {
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"data": 12,
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"type": "LITERAL",
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},
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Object {
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"data": 14,
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"type": "LITERAL",
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},
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Object {
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"data": 16,
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"type": "LITERAL",
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},
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],
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"type": "LIST",
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},
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},
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"type": "OBJECT",
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},
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},
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"name": "cogs",
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"selections": Array [],
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"type": "FIELD",
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},
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],
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"type": "INLINE_FRAGMENT",
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"typeCondition": "Gizmo",
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},
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],
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"type": "FIELD",
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},
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],
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"type": "QUERY",
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},
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Object {
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"name": "QueryWithoutParameters",
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"params": Array [],
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"selections": Array [
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Object {
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"args": Object {},
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"name": "rateLimit",
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"selections": Array [
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Object {
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"args": Object {},
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"name": "remaining",
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"selections": Array [],
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"type": "FIELD",
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},
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],
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"type": "FIELD",
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},
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],
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"type": "QUERY",
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},
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Object {
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"name": "otherThings",
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"selections": Array [
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Object {
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"args": Object {},
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"name": "__typename",
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"selections": Array [],
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"type": "FIELD",
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},
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Object {
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"args": Object {},
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"name": "quality",
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"selections": Array [],
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"type": "FIELD",
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},
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],
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"type": "FRAGMENT",
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"typeCondition": "Thing",
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},
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]
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`;
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exports[`queries end-to-end-test cases for a query using lots of features should stringify as inline 1`] = `"query QueryWithParameters($qp1: String! $qp2: String!) { thing(id: 12345 name: $qp1) { fruit(type: APPLE tasty: true) ...otherThings } more { ... on Widget { mcguffins { quantity } slime(state: SLIMY) { availability } } ... on Gizmo { cogs(attributes: { teeth: [ 12 14 16 ] shaft: null }) } } } query QueryWithoutParameters { rateLimit { remaining } } fragment otherThings on Thing { __typename quality }"`;
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exports[`queries end-to-end-test cases for a query using lots of features should stringify as multiline 1`] = `
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"query QueryWithParameters($qp1: String! $qp2: String!) {
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thing(id: 12345 name: $qp1) {
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fruit(type: APPLE tasty: true)
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...otherThings
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}
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more {
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... on Widget {
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mcguffins {
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quantity
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}
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slime(state: SLIMY) {
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availability
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}
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}
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... on Gizmo {
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cogs(attributes: { teeth: [ 12 14 16 ] shaft: null })
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}
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}
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}
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query QueryWithoutParameters {
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rateLimit {
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remaining
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}
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}
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fragment otherThings on Thing {
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__typename
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quality
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}"
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`;
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exports[`queries end-to-end-test cases for a useful query should build the query 1`] = `
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Array [
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Object {
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"name": "FetchData",
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"params": Array [
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Object {
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"name": "repoOwner",
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"type": "String!",
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},
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Object {
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"name": "repoName",
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"type": "String!",
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},
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],
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"selections": Array [
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Object {
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"args": Object {
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"name": Object {
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"data": "repoName",
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"type": "VARIABLE",
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},
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"owner": Object {
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"data": "repoOwner",
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"type": "VARIABLE",
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},
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},
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"name": "repository",
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"selections": Array [
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Object {
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"args": Object {
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"first": Object {
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"data": 100,
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"type": "LITERAL",
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},
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},
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"name": "issues",
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"selections": Array [
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Object {
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"args": Object {},
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"name": "pageInfo",
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"selections": Array [
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Object {
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"args": Object {},
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"name": "hasNextPage",
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"selections": Array [],
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"type": "FIELD",
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},
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],
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"type": "FIELD",
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},
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Object {
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"args": Object {},
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"name": "nodes",
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"selections": Array [
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Object {
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"args": Object {},
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"name": "id",
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"selections": Array [],
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"type": "FIELD",
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},
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Object {
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"args": Object {},
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"name": "title",
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"selections": Array [],
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"type": "FIELD",
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},
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Object {
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"args": Object {},
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"name": "body",
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"selections": Array [],
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"type": "FIELD",
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},
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Object {
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"args": Object {},
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"name": "number",
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"selections": Array [],
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"type": "FIELD",
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},
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Object {
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"args": Object {},
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"name": "author",
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"selections": Array [
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Object {
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"fragmentName": "whoami",
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"type": "FRAGMENT_SPREAD",
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},
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],
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"type": "FIELD",
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},
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Object {
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"args": Object {
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"first": Object {
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"data": 20,
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"type": "LITERAL",
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},
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},
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"name": "comments",
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"selections": Array [
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Object {
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"args": Object {},
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"name": "pageInfo",
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"selections": Array [
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Object {
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"args": Object {},
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"name": "hasNextPage",
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"selections": Array [],
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"type": "FIELD",
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},
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],
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"type": "FIELD",
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},
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Object {
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"args": Object {},
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"name": "nodes",
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"selections": Array [
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Object {
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"args": Object {},
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"name": "id",
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"selections": Array [],
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"type": "FIELD",
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},
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Object {
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"args": Object {},
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"name": "author",
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"selections": Array [
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Object {
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"fragmentName": "whoami",
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"type": "FRAGMENT_SPREAD",
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},
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],
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"type": "FIELD",
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},
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Object {
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"args": Object {},
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"name": "body",
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"selections": Array [],
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"type": "FIELD",
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},
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Object {
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"args": Object {},
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"name": "url",
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"selections": Array [],
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"type": "FIELD",
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},
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],
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||||
"type": "FIELD",
|
||||
},
|
||||
],
|
||||
"type": "FIELD",
|
||||
},
|
||||
],
|
||||
"type": "FIELD",
|
||||
},
|
||||
],
|
||||
"type": "FIELD",
|
||||
},
|
||||
Object {
|
||||
"args": Object {
|
||||
"first": Object {
|
||||
"data": 100,
|
||||
"type": "LITERAL",
|
||||
},
|
||||
},
|
||||
"name": "pullRequests",
|
||||
"selections": Array [
|
||||
Object {
|
||||
"args": Object {},
|
||||
"name": "pageInfo",
|
||||
"selections": Array [
|
||||
Object {
|
||||
"args": Object {},
|
||||
"name": "hasNextPage",
|
||||
"selections": Array [],
|
||||
"type": "FIELD",
|
||||
},
|
||||
],
|
||||
"type": "FIELD",
|
||||
},
|
||||
Object {
|
||||
"args": Object {},
|
||||
"name": "nodes",
|
||||
"selections": Array [
|
||||
Object {
|
||||
"args": Object {},
|
||||
"name": "id",
|
||||
"selections": Array [],
|
||||
"type": "FIELD",
|
||||
},
|
||||
Object {
|
||||
"args": Object {},
|
||||
"name": "title",
|
||||
"selections": Array [],
|
||||
"type": "FIELD",
|
||||
},
|
||||
Object {
|
||||
"args": Object {},
|
||||
"name": "body",
|
||||
"selections": Array [],
|
||||
"type": "FIELD",
|
||||
},
|
||||
Object {
|
||||
"args": Object {},
|
||||
"name": "number",
|
||||
"selections": Array [],
|
||||
"type": "FIELD",
|
||||
},
|
||||
Object {
|
||||
"args": Object {},
|
||||
"name": "author",
|
||||
"selections": Array [
|
||||
Object {
|
||||
"fragmentName": "whoami",
|
||||
"type": "FRAGMENT_SPREAD",
|
||||
},
|
||||
],
|
||||
"type": "FIELD",
|
||||
},
|
||||
Object {
|
||||
"args": Object {
|
||||
"first": Object {
|
||||
"data": 20,
|
||||
"type": "LITERAL",
|
||||
},
|
||||
},
|
||||
"name": "comments",
|
||||
"selections": Array [
|
||||
Object {
|
||||
"args": Object {},
|
||||
"name": "pageInfo",
|
||||
"selections": Array [
|
||||
Object {
|
||||
"args": Object {},
|
||||
"name": "hasNextPage",
|
||||
"selections": Array [],
|
||||
"type": "FIELD",
|
||||
},
|
||||
],
|
||||
"type": "FIELD",
|
||||
},
|
||||
Object {
|
||||
"args": Object {},
|
||||
"name": "nodes",
|
||||
"selections": Array [
|
||||
Object {
|
||||
"args": Object {},
|
||||
"name": "id",
|
||||
"selections": Array [],
|
||||
"type": "FIELD",
|
||||
},
|
||||
Object {
|
||||
"args": Object {},
|
||||
"name": "author",
|
||||
"selections": Array [
|
||||
Object {
|
||||
"fragmentName": "whoami",
|
||||
"type": "FRAGMENT_SPREAD",
|
||||
},
|
||||
],
|
||||
"type": "FIELD",
|
||||
},
|
||||
Object {
|
||||
"args": Object {},
|
||||
"name": "body",
|
||||
"selections": Array [],
|
||||
"type": "FIELD",
|
||||
},
|
||||
Object {
|
||||
"args": Object {},
|
||||
"name": "url",
|
||||
"selections": Array [],
|
||||
"type": "FIELD",
|
||||
},
|
||||
],
|
||||
"type": "FIELD",
|
||||
},
|
||||
],
|
||||
"type": "FIELD",
|
||||
},
|
||||
Object {
|
||||
"args": Object {
|
||||
"first": Object {
|
||||
"data": 10,
|
||||
"type": "LITERAL",
|
||||
},
|
||||
},
|
||||
"name": "reviews",
|
||||
"selections": Array [
|
||||
Object {
|
||||
"args": Object {},
|
||||
"name": "pageInfo",
|
||||
"selections": Array [
|
||||
Object {
|
||||
"args": Object {},
|
||||
"name": "hasNextPage",
|
||||
"selections": Array [],
|
||||
"type": "FIELD",
|
||||
},
|
||||
],
|
||||
"type": "FIELD",
|
||||
},
|
||||
Object {
|
||||
"args": Object {},
|
||||
"name": "nodes",
|
||||
"selections": Array [
|
||||
Object {
|
||||
"args": Object {},
|
||||
"name": "id",
|
||||
"selections": Array [],
|
||||
"type": "FIELD",
|
||||
},
|
||||
Object {
|
||||
"args": Object {},
|
||||
"name": "body",
|
||||
"selections": Array [],
|
||||
"type": "FIELD",
|
||||
},
|
||||
Object {
|
||||
"args": Object {},
|
||||
"name": "author",
|
||||
"selections": Array [
|
||||
Object {
|
||||
"fragmentName": "whoami",
|
||||
"type": "FRAGMENT_SPREAD",
|
||||
},
|
||||
],
|
||||
"type": "FIELD",
|
||||
},
|
||||
Object {
|
||||
"args": Object {},
|
||||
"name": "state",
|
||||
"selections": Array [],
|
||||
"type": "FIELD",
|
||||
},
|
||||
Object {
|
||||
"args": Object {
|
||||
"first": Object {
|
||||
"data": 10,
|
||||
"type": "LITERAL",
|
||||
},
|
||||
},
|
||||
"name": "comments",
|
||||
"selections": Array [
|
||||
Object {
|
||||
"args": Object {},
|
||||
"name": "pageInfo",
|
||||
"selections": Array [
|
||||
Object {
|
||||
"args": Object {},
|
||||
"name": "hasNextPage",
|
||||
"selections": Array [],
|
||||
"type": "FIELD",
|
||||
},
|
||||
],
|
||||
"type": "FIELD",
|
||||
},
|
||||
Object {
|
||||
"args": Object {},
|
||||
"name": "nodes",
|
||||
"selections": Array [
|
||||
Object {
|
||||
"args": Object {},
|
||||
"name": "id",
|
||||
"selections": Array [],
|
||||
"type": "FIELD",
|
||||
},
|
||||
Object {
|
||||
"args": Object {},
|
||||
"name": "body",
|
||||
"selections": Array [],
|
||||
"type": "FIELD",
|
||||
},
|
||||
Object {
|
||||
"args": Object {},
|
||||
"name": "author",
|
||||
"selections": Array [
|
||||
Object {
|
||||
"fragmentName": "whoami",
|
||||
"type": "FRAGMENT_SPREAD",
|
||||
},
|
||||
],
|
||||
"type": "FIELD",
|
||||
},
|
||||
],
|
||||
"type": "FIELD",
|
||||
},
|
||||
],
|
||||
"type": "FIELD",
|
||||
},
|
||||
],
|
||||
"type": "FIELD",
|
||||
},
|
||||
],
|
||||
"type": "FIELD",
|
||||
},
|
||||
],
|
||||
"type": "FIELD",
|
||||
},
|
||||
],
|
||||
"type": "FIELD",
|
||||
},
|
||||
],
|
||||
"type": "FIELD",
|
||||
},
|
||||
],
|
||||
"type": "QUERY",
|
||||
},
|
||||
Object {
|
||||
"name": "whoami",
|
||||
"selections": Array [
|
||||
Object {
|
||||
"args": Object {},
|
||||
"name": "__typename",
|
||||
"selections": Array [],
|
||||
"type": "FIELD",
|
||||
},
|
||||
Object {
|
||||
"args": Object {},
|
||||
"name": "login",
|
||||
"selections": Array [],
|
||||
"type": "FIELD",
|
||||
},
|
||||
Object {
|
||||
"selections": Array [
|
||||
Object {
|
||||
"args": Object {},
|
||||
"name": "id",
|
||||
"selections": Array [],
|
||||
"type": "FIELD",
|
||||
},
|
||||
],
|
||||
"type": "INLINE_FRAGMENT",
|
||||
"typeCondition": "User",
|
||||
},
|
||||
Object {
|
||||
"selections": Array [
|
||||
Object {
|
||||
"args": Object {},
|
||||
"name": "id",
|
||||
"selections": Array [],
|
||||
"type": "FIELD",
|
||||
},
|
||||
],
|
||||
"type": "INLINE_FRAGMENT",
|
||||
"typeCondition": "Organization",
|
||||
},
|
||||
Object {
|
||||
"selections": Array [
|
||||
Object {
|
||||
"args": Object {},
|
||||
"name": "id",
|
||||
"selections": Array [],
|
||||
"type": "FIELD",
|
||||
},
|
||||
],
|
||||
"type": "INLINE_FRAGMENT",
|
||||
"typeCondition": "Bot",
|
||||
},
|
||||
],
|
||||
"type": "FRAGMENT",
|
||||
"typeCondition": "Actor",
|
||||
},
|
||||
]
|
||||
`;
|
||||
|
||||
exports[`queries end-to-end-test cases for a useful query should stringify as inline 1`] = `"query FetchData($repoOwner: String! $repoName: String!) { repository(owner: $repoOwner name: $repoName) { issues(first: 100) { pageInfo { hasNextPage } nodes { id title body number author { ...whoami } comments(first: 20) { pageInfo { hasNextPage } nodes { id author { ...whoami } body url } } } } pullRequests(first: 100) { pageInfo { hasNextPage } nodes { id title body number author { ...whoami } comments(first: 20) { pageInfo { hasNextPage } nodes { id author { ...whoami } body url } } reviews(first: 10) { pageInfo { hasNextPage } nodes { id body author { ...whoami } state comments(first: 10) { pageInfo { hasNextPage } nodes { id body author { ...whoami } } } } } } } } } fragment whoami on Actor { __typename login ... on User { id } ... on Organization { id } ... on Bot { id } }"`;
|
||||
|
||||
exports[`queries end-to-end-test cases for a useful query should stringify as multiline 1`] = `
|
||||
"query FetchData($repoOwner: String! $repoName: String!) {
|
||||
repository(owner: $repoOwner name: $repoName) {
|
||||
issues(first: 100) {
|
||||
pageInfo {
|
||||
hasNextPage
|
||||
}
|
||||
nodes {
|
||||
id
|
||||
title
|
||||
body
|
||||
number
|
||||
author {
|
||||
...whoami
|
||||
}
|
||||
comments(first: 20) {
|
||||
pageInfo {
|
||||
hasNextPage
|
||||
}
|
||||
nodes {
|
||||
id
|
||||
author {
|
||||
...whoami
|
||||
}
|
||||
body
|
||||
url
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
pullRequests(first: 100) {
|
||||
pageInfo {
|
||||
hasNextPage
|
||||
}
|
||||
nodes {
|
||||
id
|
||||
title
|
||||
body
|
||||
number
|
||||
author {
|
||||
...whoami
|
||||
}
|
||||
comments(first: 20) {
|
||||
pageInfo {
|
||||
hasNextPage
|
||||
}
|
||||
nodes {
|
||||
id
|
||||
author {
|
||||
...whoami
|
||||
}
|
||||
body
|
||||
url
|
||||
}
|
||||
}
|
||||
reviews(first: 10) {
|
||||
pageInfo {
|
||||
hasNextPage
|
||||
}
|
||||
nodes {
|
||||
id
|
||||
body
|
||||
author {
|
||||
...whoami
|
||||
}
|
||||
state
|
||||
comments(first: 10) {
|
||||
pageInfo {
|
||||
hasNextPage
|
||||
}
|
||||
nodes {
|
||||
id
|
||||
body
|
||||
author {
|
||||
...whoami
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
fragment whoami on Actor {
|
||||
__typename
|
||||
login
|
||||
... on User {
|
||||
id
|
||||
}
|
||||
... on Organization {
|
||||
id
|
||||
}
|
||||
... on Bot {
|
||||
id
|
||||
}
|
||||
}"
|
||||
`;
|
||||
|
|
@ -0,0 +1,398 @@
|
|||
// @flow
|
||||
|
||||
/**
|
||||
* GraphQL structured query data format.
|
||||
*
|
||||
* Main module exports:
|
||||
* - lots of types for various GraphQL language constructs
|
||||
* - the `build` object, providing a fluent builder API
|
||||
* - the `stringify` object, and particularly `stringify.body`
|
||||
* - the two layout strategies `multilineLayout` and `inlineLayout`
|
||||
*/
|
||||
|
||||
export type Body = Definition[];
|
||||
|
||||
export type Definition = QueryDefinition | FragmentDefinition;
|
||||
|
||||
// We only need opaque type handles; no need to embed the GraphQL type
|
||||
// system into Flow.
|
||||
export type GraphQLType = string;
|
||||
|
||||
export type QueryDefinition = {|
|
||||
+type: "QUERY",
|
||||
+name: string,
|
||||
+params: Parameter[],
|
||||
+selections: Selection[],
|
||||
|};
|
||||
export type Parameter = {|+name: string, +type: GraphQLType|};
|
||||
|
||||
export type FragmentDefinition = {|
|
||||
+type: "FRAGMENT",
|
||||
+name: string,
|
||||
+typeCondition: GraphQLType,
|
||||
+selections: Selection[],
|
||||
|};
|
||||
|
||||
export type Selection = Field | FragmentSpread | InlineFragment;
|
||||
export type Field = {|
|
||||
+type: "FIELD",
|
||||
+name: string,
|
||||
+args: Arguments,
|
||||
+selections: Selection[],
|
||||
|};
|
||||
export type FragmentSpread = {|
|
||||
+type: "FRAGMENT_SPREAD",
|
||||
+fragmentName: string,
|
||||
|};
|
||||
export type InlineFragment = {|
|
||||
+type: "INLINE_FRAGMENT",
|
||||
+typeCondition: ?GraphQLType,
|
||||
+selections: Selection[],
|
||||
|};
|
||||
|
||||
export type Arguments = {[string]: Value};
|
||||
export type Value =
|
||||
| VariableValue
|
||||
| LiteralValue
|
||||
| EnumValue
|
||||
| ListValue
|
||||
| ObjectValue;
|
||||
export type VariableValue = {|+type: "VARIABLE", +data: string|};
|
||||
export type LiteralValue = {|
|
||||
+type: "LITERAL",
|
||||
+data: number | string | boolean | null,
|
||||
|};
|
||||
export type EnumValue = {|+type: "ENUM", +data: string|};
|
||||
export type ListValue = {|+type: "LIST", +data: Value[]|};
|
||||
export type ObjectValue = {|+type: "OBJECT", +data: {[string]: Value}|};
|
||||
|
||||
export const build = {
|
||||
query(
|
||||
name: string,
|
||||
params: Parameter[],
|
||||
selections: Selection[]
|
||||
): QueryDefinition {
|
||||
return {
|
||||
type: "QUERY",
|
||||
name,
|
||||
params,
|
||||
selections,
|
||||
};
|
||||
},
|
||||
|
||||
param(name: string, type: GraphQLType): Parameter {
|
||||
return {name, type};
|
||||
},
|
||||
|
||||
fragment(
|
||||
name: string,
|
||||
typeCondition: GraphQLType,
|
||||
selections: Selection[]
|
||||
): FragmentDefinition {
|
||||
return {
|
||||
type: "FRAGMENT",
|
||||
name,
|
||||
typeCondition,
|
||||
selections,
|
||||
};
|
||||
},
|
||||
|
||||
field(name: string, args: ?Arguments, selections: ?(Selection[])): Field {
|
||||
return {
|
||||
type: "FIELD",
|
||||
name,
|
||||
args: args || {},
|
||||
selections: selections || [],
|
||||
};
|
||||
},
|
||||
|
||||
fragmentSpread(fragmentName: string): FragmentSpread {
|
||||
return {
|
||||
type: "FRAGMENT_SPREAD",
|
||||
fragmentName,
|
||||
};
|
||||
},
|
||||
|
||||
inlineFragment(
|
||||
typeCondition: ?GraphQLType,
|
||||
selections: Selection[]
|
||||
): InlineFragment {
|
||||
return {
|
||||
type: "INLINE_FRAGMENT",
|
||||
typeCondition,
|
||||
selections,
|
||||
};
|
||||
},
|
||||
|
||||
variable(name: string): VariableValue {
|
||||
return {
|
||||
type: "VARIABLE",
|
||||
data: name,
|
||||
};
|
||||
},
|
||||
|
||||
literal(value: number | string | boolean | null): LiteralValue {
|
||||
return {
|
||||
type: "LITERAL",
|
||||
data: value,
|
||||
};
|
||||
},
|
||||
|
||||
enumLiteral(value: string): EnumValue {
|
||||
return {
|
||||
type: "ENUM",
|
||||
data: value,
|
||||
};
|
||||
},
|
||||
|
||||
list(data: Value[]): ListValue {
|
||||
return {
|
||||
type: "LIST",
|
||||
data: data,
|
||||
};
|
||||
},
|
||||
|
||||
object(data: {[string]: Value}): ObjectValue {
|
||||
return {
|
||||
type: "OBJECT",
|
||||
data: data,
|
||||
};
|
||||
},
|
||||
};
|
||||
|
||||
/**
|
||||
* A strategy for stringifying a sequence of GraphQL language tokens.
|
||||
*/
|
||||
export interface LayoutStrategy {
|
||||
// Lay out a group of tokens that should be treated atomically.
|
||||
atom(line: string): string;
|
||||
|
||||
// Join groups of tokens. The elements should be the results of calls
|
||||
// to `atom` (or other `join`s).
|
||||
join(lines: string[]): string;
|
||||
|
||||
// Get a strategy for the next level of nesting. For instance, if this
|
||||
// object lays out its result over multiple lines, then this method
|
||||
// might produce a strategy with one extra level of indentation.
|
||||
next(): LayoutStrategy;
|
||||
}
|
||||
|
||||
/**
|
||||
* Create a layout strategy that lays out text over multiple lines,
|
||||
* indenting with the given tab string (such as "\t" or " ").
|
||||
*/
|
||||
export function multilineLayout(tab: string): LayoutStrategy {
|
||||
function strategy(indentLevel: number) {
|
||||
return {
|
||||
atom: (line: string) => {
|
||||
const indentation = Array(indentLevel)
|
||||
.fill(tab)
|
||||
.join("");
|
||||
return indentation + line;
|
||||
},
|
||||
join: (xs: string[]) => xs.join("\n"),
|
||||
next: () => strategy(indentLevel + 1),
|
||||
};
|
||||
}
|
||||
return strategy(0);
|
||||
}
|
||||
|
||||
/**
|
||||
* Create a layout strategy that lays out all text on one line.
|
||||
*/
|
||||
export function inlineLayout(): LayoutStrategy {
|
||||
const result = {
|
||||
atom: (line) => line,
|
||||
join: (xs) => xs.join(" "),
|
||||
next: () => result,
|
||||
};
|
||||
return result;
|
||||
}
|
||||
|
||||
/*
|
||||
* Map a stringification function across a list, and join the results
|
||||
* with a formatter.
|
||||
*/
|
||||
function formatList<T>(
|
||||
values: T[],
|
||||
subformatter: (value: T, ls: LayoutStrategy) => string,
|
||||
ls: LayoutStrategy
|
||||
): string {
|
||||
return ls.join(values.map((x) => subformatter(x, ls)));
|
||||
}
|
||||
|
||||
/*
|
||||
* Map a stringification function across the values of an object, and
|
||||
* join the keys and their corresponding results with a formatter.
|
||||
*/
|
||||
function formatObject<T>(
|
||||
object: {[string]: T},
|
||||
subformatter: (value: T, ls: LayoutStrategy) => string,
|
||||
ls: LayoutStrategy
|
||||
): string {
|
||||
function formatKey(k: string, ls: LayoutStrategy): string {
|
||||
return ls.join([ls.atom(`${k}:`), subformatter(object[k], ls.next())]);
|
||||
}
|
||||
return formatList(Object.keys(object), formatKey, ls);
|
||||
}
|
||||
|
||||
export const stringify = {
|
||||
body(body: Body, ls: LayoutStrategy): string {
|
||||
return formatList(body, stringify.definition, ls);
|
||||
},
|
||||
|
||||
definition(definition: Definition, ls: LayoutStrategy): string {
|
||||
switch (definition.type) {
|
||||
case "QUERY":
|
||||
return stringify.queryDefinition(definition, ls);
|
||||
case "FRAGMENT":
|
||||
return stringify.fragmentDefinition(definition, ls);
|
||||
default:
|
||||
throw new Error(`Unknown definition type: ${definition.type}`);
|
||||
}
|
||||
},
|
||||
|
||||
queryDefinition(query: QueryDefinition, ls: LayoutStrategy): string {
|
||||
const paramsPart = (() => {
|
||||
if (query.params.length === 0) {
|
||||
return "";
|
||||
} else {
|
||||
const items = formatList(
|
||||
query.params,
|
||||
stringify.parameter,
|
||||
inlineLayout()
|
||||
);
|
||||
return `(${items})`;
|
||||
}
|
||||
})();
|
||||
const selectionsPart = formatList(
|
||||
query.selections,
|
||||
stringify.selection,
|
||||
ls.next()
|
||||
);
|
||||
return ls.join([
|
||||
ls.atom(`query ${query.name}${paramsPart} {`),
|
||||
selectionsPart,
|
||||
ls.atom("}"),
|
||||
]);
|
||||
},
|
||||
|
||||
parameter(parameter: Parameter, ls: LayoutStrategy): string {
|
||||
return ls.atom(`\$${parameter.name}: ${parameter.type}`);
|
||||
},
|
||||
|
||||
fragmentDefinition(fragment: FragmentDefinition, ls: LayoutStrategy): string {
|
||||
const selectionsPart = formatList(
|
||||
fragment.selections,
|
||||
stringify.selection,
|
||||
ls.next()
|
||||
);
|
||||
return ls.join([
|
||||
ls.atom(`fragment ${fragment.name} on ${fragment.typeCondition} {`),
|
||||
selectionsPart,
|
||||
ls.atom("}"),
|
||||
]);
|
||||
},
|
||||
|
||||
selection(selection: Selection, ls: LayoutStrategy): string {
|
||||
switch (selection.type) {
|
||||
case "FIELD":
|
||||
return stringify.field(selection, ls);
|
||||
case "FRAGMENT_SPREAD":
|
||||
return stringify.fragmentSpread(selection, ls);
|
||||
case "INLINE_FRAGMENT":
|
||||
return stringify.inlineFragment(selection, ls);
|
||||
default:
|
||||
throw new Error(`Unknown selection type: ${selection.type}`);
|
||||
}
|
||||
},
|
||||
|
||||
field(field: Field, ls: LayoutStrategy): string {
|
||||
const argsPart = (() => {
|
||||
if (Object.keys(field.args).length === 0) {
|
||||
return "";
|
||||
} else {
|
||||
const args = formatObject(field.args, stringify.value, inlineLayout());
|
||||
return `(${args})`;
|
||||
}
|
||||
})();
|
||||
if (field.selections.length === 0) {
|
||||
return ls.atom(`${field.name}${argsPart}`);
|
||||
} else {
|
||||
const selectionsPart = formatList(
|
||||
field.selections,
|
||||
stringify.selection,
|
||||
ls.next()
|
||||
);
|
||||
return ls.join([
|
||||
ls.atom(`${field.name}${argsPart} {`),
|
||||
selectionsPart,
|
||||
ls.atom("}"),
|
||||
]);
|
||||
}
|
||||
},
|
||||
|
||||
fragmentSpread(fs: FragmentSpread, ls: LayoutStrategy): string {
|
||||
return ls.atom(`...${fs.fragmentName}`);
|
||||
},
|
||||
|
||||
inlineFragment(fragment: InlineFragment, ls: LayoutStrategy): string {
|
||||
const typeConditionPart =
|
||||
fragment.typeCondition == null ? "" : ` on ${fragment.typeCondition}`;
|
||||
const selectionsPart = formatList(
|
||||
fragment.selections,
|
||||
stringify.selection,
|
||||
ls.next()
|
||||
);
|
||||
return ls.join([
|
||||
ls.atom(`...${typeConditionPart} {`),
|
||||
selectionsPart,
|
||||
ls.atom("}"),
|
||||
]);
|
||||
},
|
||||
|
||||
value(value: Value, ls: LayoutStrategy): string {
|
||||
switch (value.type) {
|
||||
case "VARIABLE":
|
||||
return stringify.variableValue(value, ls);
|
||||
case "LITERAL":
|
||||
return stringify.literalValue(value, ls);
|
||||
case "ENUM":
|
||||
return stringify.enumValue(value, ls);
|
||||
case "LIST":
|
||||
return stringify.listValue(value, ls);
|
||||
case "OBJECT":
|
||||
return stringify.objectValue(value, ls);
|
||||
default:
|
||||
throw new Error(`Unknown value type: ${value.type}`);
|
||||
}
|
||||
},
|
||||
|
||||
variableValue(value: VariableValue, ls: LayoutStrategy): string {
|
||||
return ls.atom(`\$${value.data}`);
|
||||
},
|
||||
|
||||
literalValue(value: LiteralValue, ls: LayoutStrategy): string {
|
||||
return ls.atom(JSON.stringify(value.data));
|
||||
},
|
||||
|
||||
enumValue(value: EnumValue, ls: LayoutStrategy): string {
|
||||
return ls.atom(value.data);
|
||||
},
|
||||
|
||||
listValue(value: ListValue, ls: LayoutStrategy): string {
|
||||
return ls.join([
|
||||
ls.atom("["),
|
||||
formatList(value.data, stringify.value, ls.next()),
|
||||
ls.atom("]"),
|
||||
]);
|
||||
},
|
||||
|
||||
objectValue(value: ObjectValue, ls: LayoutStrategy): string {
|
||||
return ls.join([
|
||||
ls.atom("{"),
|
||||
formatObject(value.data, stringify.value, ls.next()),
|
||||
ls.atom("}"),
|
||||
]);
|
||||
},
|
||||
};
|
||||
|
|
@ -0,0 +1,200 @@
|
|||
// @flow
|
||||
|
||||
import type {Body} from "./queries";
|
||||
import {build, stringify, multilineLayout, inlineLayout} from "./queries";
|
||||
|
||||
describe("queries", () => {
|
||||
describe("end-to-end-test cases", () => {
|
||||
const testCases = {
|
||||
"a query using lots of features": featurefulQuery,
|
||||
"a useful query": usefulQuery,
|
||||
};
|
||||
Object.keys(testCases).forEach((key) => {
|
||||
describe(`for ${key}`, () => {
|
||||
const testCase = testCases[key];
|
||||
it("should build the query", () => {
|
||||
expect(testCase()).toMatchSnapshot();
|
||||
});
|
||||
it("should stringify as multiline", () => {
|
||||
const result = stringify.body(testCase(), multilineLayout(" "));
|
||||
expect(result).toMatchSnapshot();
|
||||
});
|
||||
it("should stringify as inline", () => {
|
||||
const result = stringify.body(testCase(), inlineLayout());
|
||||
expect(result).toMatchSnapshot();
|
||||
});
|
||||
});
|
||||
});
|
||||
});
|
||||
describe("complex object stringification", () => {
|
||||
const object = () => {
|
||||
const b = build;
|
||||
return b.object({
|
||||
exampleNumber: b.literal(123),
|
||||
exampleString: b.literal("hello"),
|
||||
exampleBoolean: b.literal(true),
|
||||
exampleNull: b.literal(null),
|
||||
exampleEnum: b.enumLiteral("WORLD"),
|
||||
exampleVariable: b.variable("widget"),
|
||||
exampleList: b.list([b.literal(12), b.literal(14), b.literal(16)]),
|
||||
exampleObject: b.object({
|
||||
roses: b.literal("red"),
|
||||
violets: b.literal("blue"),
|
||||
}),
|
||||
nestedList: b.list([
|
||||
b.list([b.literal("w"), b.literal("x")]),
|
||||
b.list([b.literal("y"), b.literal("z")]),
|
||||
]),
|
||||
nestedObject: b.object({
|
||||
english: b.object({
|
||||
n1: b.literal("one"),
|
||||
n2: b.literal("two"),
|
||||
}),
|
||||
greek: b.object({
|
||||
n1: b.literal("ένα"),
|
||||
n2: b.literal("δύο"),
|
||||
}),
|
||||
}),
|
||||
});
|
||||
};
|
||||
it("should build the object", () => {
|
||||
expect(object()).toMatchSnapshot();
|
||||
});
|
||||
it("should work multiline", () => {
|
||||
const result = stringify.value(object(), multilineLayout(" "));
|
||||
expect(result).toMatchSnapshot();
|
||||
});
|
||||
it("should work inline", () => {
|
||||
const result = stringify.value(object(), inlineLayout());
|
||||
expect(result).toMatchSnapshot();
|
||||
});
|
||||
});
|
||||
});
|
||||
|
||||
function featurefulQuery(): Body {
|
||||
const b = build;
|
||||
const body: Body = [
|
||||
b.query(
|
||||
"QueryWithParameters",
|
||||
[b.param("qp1", "String!"), b.param("qp2", "String!")],
|
||||
[
|
||||
b.field("thing", {id: b.literal(12345), name: b.variable("qp1")}, [
|
||||
b.field("fruit", {
|
||||
type: b.enumLiteral("APPLE"),
|
||||
tasty: b.literal(true),
|
||||
}),
|
||||
b.fragmentSpread("otherThings"),
|
||||
]),
|
||||
b.field("more", {}, [
|
||||
b.inlineFragment("Widget", [
|
||||
b.field("mcguffins", {}, [b.field("quantity")]),
|
||||
b.field("slime", {state: b.enumLiteral("SLIMY")}, [
|
||||
b.field("availability"),
|
||||
]),
|
||||
]),
|
||||
b.inlineFragment("Gizmo", [
|
||||
b.field("cogs", {
|
||||
attributes: b.object({
|
||||
teeth: b.list([b.literal(12), b.literal(14), b.literal(16)]),
|
||||
shaft: b.literal(null),
|
||||
}),
|
||||
}),
|
||||
]),
|
||||
]),
|
||||
]
|
||||
),
|
||||
b.query(
|
||||
"QueryWithoutParameters",
|
||||
[],
|
||||
[b.field("rateLimit", {}, [b.field("remaining")])]
|
||||
),
|
||||
b.fragment("otherThings", "Thing", [
|
||||
b.field("__typename"),
|
||||
b.field("quality"),
|
||||
]),
|
||||
];
|
||||
return body;
|
||||
}
|
||||
|
||||
function usefulQuery(): Body {
|
||||
const b = build;
|
||||
const makePageInfo = () => b.field("pageInfo", {}, [b.field("hasNextPage")]);
|
||||
const makeAuthor = () => b.field("author", {}, [b.fragmentSpread("whoami")]);
|
||||
const body: Body = [
|
||||
b.query(
|
||||
"FetchData",
|
||||
[b.param("repoOwner", "String!"), b.param("repoName", "String!")],
|
||||
[
|
||||
b.field(
|
||||
"repository",
|
||||
{owner: b.variable("repoOwner"), name: b.variable("repoName")},
|
||||
[
|
||||
b.field("issues", {first: b.literal(100)}, [
|
||||
makePageInfo(),
|
||||
b.field("nodes", {}, [
|
||||
b.field("id"),
|
||||
b.field("title"),
|
||||
b.field("body"),
|
||||
b.field("number"),
|
||||
makeAuthor(),
|
||||
b.field("comments", {first: b.literal(20)}, [
|
||||
makePageInfo(),
|
||||
b.field("nodes", {}, [
|
||||
b.field("id"),
|
||||
makeAuthor(),
|
||||
b.field("body"),
|
||||
b.field("url"),
|
||||
]),
|
||||
]),
|
||||
]),
|
||||
]),
|
||||
b.field("pullRequests", {first: b.literal(100)}, [
|
||||
makePageInfo(),
|
||||
b.field("nodes", {}, [
|
||||
b.field("id"),
|
||||
b.field("title"),
|
||||
b.field("body"),
|
||||
b.field("number"),
|
||||
makeAuthor(),
|
||||
b.field("comments", {first: b.literal(20)}, [
|
||||
makePageInfo(),
|
||||
b.field("nodes", {}, [
|
||||
b.field("id"),
|
||||
makeAuthor(),
|
||||
b.field("body"),
|
||||
b.field("url"),
|
||||
]),
|
||||
]),
|
||||
b.field("reviews", {first: b.literal(10)}, [
|
||||
makePageInfo(),
|
||||
b.field("nodes", {}, [
|
||||
b.field("id"),
|
||||
b.field("body"),
|
||||
makeAuthor(),
|
||||
b.field("state"),
|
||||
b.field("comments", {first: b.literal(10)}, [
|
||||
makePageInfo(),
|
||||
b.field("nodes", {}, [
|
||||
b.field("id"),
|
||||
b.field("body"),
|
||||
makeAuthor(),
|
||||
]),
|
||||
]),
|
||||
]),
|
||||
]),
|
||||
]),
|
||||
]),
|
||||
]
|
||||
),
|
||||
]
|
||||
),
|
||||
b.fragment("whoami", "Actor", [
|
||||
b.field("__typename"),
|
||||
b.field("login"),
|
||||
b.inlineFragment("User", [b.field("id")]),
|
||||
b.inlineFragment("Organization", [b.field("id")]),
|
||||
b.inlineFragment("Bot", [b.field("id")]),
|
||||
]),
|
||||
];
|
||||
return body;
|
||||
}
|
||||
Loading…
Reference in New Issue