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metro-bundler/src/ModuleGraph: test image asset transform

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Reviewed By: davidaurelio

Differential Revision: D6039836

fbshipit-source-id: 0fc022b72892f8a7064482f63e19b9fa5a3d5b00
This commit is contained in:
Jean Lauliac 2017-10-12 09:46:55 -07:00 committed by Facebook Github Bot
parent 0608332cb9
commit 55a22d2c5c
2 changed files with 52 additions and 0 deletions
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36
packages/metro-bundler/src/ModuleGraph/worker/__tests__/__snapshots__/transform-module-test.js.snap
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@ -1,3 +1,39 @@
// Jest Snapshot v1, https://goo.gl/fbAQLP
exports[`transforming JS modules: assets extract image sizes, platform, scale 1`] = `
Object {
"details": Object {
"assetPath": "foo.png",
"contentBase64": "eyJfX3NpemUiOnsid2lkdGgiOjMwLCJoZWlnaHQiOjIwfX0=",
"contentType": "png",
"filePath": "foo.png",
"physicalSize": Object {
"height": 20,
"width": 30,
},
"platform": null,
"scale": 1,
},
"type": "asset",
}
`;
exports[`transforming JS modules: assets extract image sizes, platform, scale 2`] = `
Object {
"details": Object {
"assetPath": "foo.png",
"contentBase64": "eyJfX3NpemUiOnsid2lkdGgiOjMwLCJoZWlnaHQiOjIwfX0=",
"contentType": "png",
"filePath": "foo@2x.ios.png",
"physicalSize": Object {
"height": 20,
"width": 30,
},
"platform": "ios",
"scale": 2,
},
"type": "asset",
}
`;
exports[`transforming JS modules: assets throws on empty images 1`] = `"Image asset \`foo.png\` cannot be an empty file."`;

16
packages/metro-bundler/src/ModuleGraph/worker/__tests__/transform-module-test.js
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@ -21,6 +21,10 @@ const {parse} = require('babylon');
const generate = require('babel-generator').default;
const {traverse} = require('babel-core');
jest.mock('image-size', () => buffer => {
return JSON.parse(buffer.toString('utf8')).__size;
});
describe('transforming JS modules:', () => {
const filename = 'arbitrary';
@ -212,6 +216,18 @@ describe('transforming JS modules:', () => {
});
describe('assets', () => {
it('extract image sizes, platform, scale', () => {
const image = {__size: {width: 30, height: 20}};
['foo.png', 'foo@2x.ios.png'].forEach(filePath => {
expect(
transformModule(new Buffer(JSON.stringify(image), 'utf8'), {
...options(),
filename: filePath,
}),
).toMatchSnapshot();
});
});
it('throws on empty images', () => {
expect(() =>
transformModule(new Buffer(0), {...options(), filename: 'foo.png'}),