realm-js/tests/js/asserts.js

270 lines
9.4 KiB
JavaScript

////////////////////////////////////////////////////////////////////////////
//
// Copyright 2016 Realm Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
////////////////////////////////////////////////////////////////////////////
'use strict';
module.exports = {
assertSimilar: function(type, val1, val2, errorMessage, depth) {
depth = depth || 0;
this.assertDefined(type, depth + 1);
type = type.replace('?', '');
if (val2 === null) {
this.assertNull(val1, errorMessage, depth + 1);
}
else if (type === 'float' || type === 'double') {
this.assertEqualWithTolerance(val1, val2, 0.000001, errorMessage, depth + 1);
}
else if (type === 'data') {
this.assertArraysEqual(new Uint8Array(val1), val2, errorMessage, depth + 1);
}
else if (type === 'date') {
this.assertEqual(val1 && val1.getTime(), val2.getTime(), errorMessage, depth + 1);
}
else if (type === 'object') {
for (const key of Object.keys(val1)) {
const message = errorMessage ? `${errorMessage}: ${key}` : key;
this.assertEqual(val1[key], val2[key], message, depth + 1);
}
}
else if (type === 'list') {
this.assertArraysEqual(val1, val2, errorMessage, depth + 1);
}
else {
this.assertEqual(val1, val2, errorMessage, depth + 1);
}
},
assertEqual: function(val1, val2, errorMessage, depth) {
if (val1 !== val2) {
let message = `'${val1}' does not equal expected value '${val2}'`;
if (errorMessage) {
message = `${errorMessage} - ${message}`;
}
throw new TestFailureError(message, depth);
}
},
assertNotEqual: function(val1, val2, errorMessage, depth) {
if (val1 === val2) {
let message = `'${val1}' equals '${val2}'`;
if (errorMessage) {
message = `${errorMessage} - ${message}`;
}
throw new TestFailureError(message, depth);
}
},
assertEqualWithTolerance: function(val1, val2, tolerance, errorMessage, depth) {
if (val1 < val2 - tolerance || val1 > val2 + tolerance) {
let message = `'${val1}' does not equal '${val2}' with tolerance '${tolerance}'`;
if (errorMessage) {
message = `${errorMessage} - ${message}`;
}
throw new TestFailureError(message, depth);
}
},
assertArray: function(value, length, errorMessage, depth) {
if (!Array.isArray(value)) {
throw new TestFailureError(errorMessage || `Value ${value} is not an array`, depth);
}
},
assertArrayLength: function(value, length, errorMessage, depth) {
this.assertArray(value, 1 + depth || 0);
if (value.length !== length) {
throw new TestFailureError(errorMessage || `Value ${value} is not an array of length ${length}`, depth);
}
},
assertArraysEqual: function(val1, val2, errorMessage, depth) {
this.assertDefined(val1, `val1 should be non-null but is ${val1}`, 1 + (depth || 0));
this.assertDefined(val2, `val2 should be non-null but is ${val2}`, 1 + (depth || 0));
const len1 = val1.length;
const len2 = val2.length;
if (len1 !== len2) {
let message = `Arrays (${val1}) and (${val2}) have different lengths (${len1} != ${len2})`;
if (errorMessage) {
message = `${errorMessage} - ${message}`;
}
throw new TestFailureError(message, depth);
}
let compare;
if (val1.type === "data") {
compare = (i, a, b) => a === b || this.assertArraysEqual(new Uint8Array(a), b, `Data elements at index ${i}`, 1) || true;
}
else if (val1.type === "date") {
compare = (i, a, b) => (a && a.getTime()) === (b && b.getTime());
}
else if (val1.type === "float" || val1.type === "double") {
compare = (i, a, b) => a >= b - 0.000001 && a <= b + 0.000001;
}
else if (val1.type === 'object') {
compare = (i, a, b) => Object.keys(a).every(key => a[key] === b[key]);
}
else {
compare = (i, a, b) => a === b;
}
for (let i = 0; i < len1; i++) {
if (!compare(i, val1[i], val2[i])) {
let message = `Array contents not equal at index ${i} (${val1[i]} != ${val2[i]})`;
if (errorMessage) {
message = `${errorMessage} - ${message}`;
}
throw new TestFailureError(message, depth);
}
}
},
assertThrows: function(func, errorMessage, depth) {
let caught = false;
try {
func();
}
catch (e) {
caught = true;
}
if (!caught) {
throw new TestFailureError(errorMessage || 'Expected exception not thrown', depth);
}
},
assertThrowsException: function(func, expectedException) {
let caught = false;
try {
func();
}
catch (e) {
caught = true;
if (e.name !== expectedException.name) {
throw new TestFailureError(`Expected a ${expectedException.name} exception but caught a ${e.name} instead. Message was: ${e.message}`);
}
if (e.message != expectedException.message) {
throw new TestFailureError(`Expected exception "${expectedException}" not thrown - instead caught: "${e}"`);
}
}
if (!caught) {
throw new TestFailureError('Expected exception not thrown');
}
},
assertThrowsContaining: function(func, expectedMessage, depth) {
let caught = false;
try {
func();
}
catch (e) {
caught = true;
if (!e.message.includes(expectedMessage)) {
throw new TestFailureError(`Expected exception "${expectedMessage}" not thrown - instead caught: "${e}"`, depth);
}
}
if (!caught) {
throw new TestFailureError(`Expected exception "${expectedMessage}" not thrown`, depth);
}
},
assertTrue: function(condition, errorMessage, depth) {
if (!condition) {
throw new TestFailureError(errorMessage || `Condition ${condition} expected to be true`, depth);
}
},
assertFalse: function(condition, errorMessage, depth) {
if (condition) {
throw new TestFailureError(errorMessage || `Condition ${condition} expected to be false`, depth);
}
},
assertInstanceOf: function(object, type, errorMessage, depth) {
if (!(object instanceof type)) {
throw new TestFailureError(errorMessage || `Object ${object} expected to be of type ${type}`, depth);
}
},
assertType: function(value, type, depth) {
try {
this.assertEqual(typeof value, type, "", 1 + depth || 0);
}
catch (e) {
throw new Error(`Value ${value} expected to be of type ${type}`)
}
},
assertDefined: function(value, errorMessage, depth) {
if (value === undefined || value === null) {
throw new TestFailureError(errorMessage || `Value ${value} expected to be non-null`, depth);
}
},
assertUndefined: function(value, errorMessage, depth) {
if (value !== undefined) {
throw new TestFailureError(errorMessage || `Value ${value} expected to be undefined`, depth);
}
},
assertNull: function(value, errorMessage, depth) {
if (value !== null) {
throw new TestFailureError(errorMessage || `Value ${value} expected to be null`, depth);
}
},
isNode: function() {
// eslint-disable-next-line no-undef
return typeof process == 'object' && Object.prototype.toString.call(process) == '[object process]';
},
isNode6: function() {
// eslint-disable-next-line no-undef
return this.isNode() && process.version.indexOf('v6.') == 0;
},
};
function TestFailureError(message, depth) {
let error;
try {
throw new Error(message);
} catch (e) {
error = e;
}
depth = 2 + (depth || 0);
// This regular expression will match stack trace lines provided by JavaScriptCore.
// Example: someMethod@file:///path/to/file.js:10:24
const regex = /^(?:.*?@)?([^\[\(].+?):(\d+)(?::(\d+))?\s*$/;
// Remove the top two stack frames and use information from the third, if possible.
const stack = error.stack && error.stack.split('\n');
const match = stack[depth] && stack[depth].match(regex);
if (match) {
this.sourceURL = match[1];
this.line = +match[2];
this.column = +match[3];
this.stack = stack.slice(depth).join('\n');
}
this.__proto__ = error;
}