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* Install test dependencies. * Add initial test files. These files were created using a simplistic AST manipulator using `recast` to preserve formatting. There's bound to be a huge chunk of errors, but this serves as a good start. QUnit was replaced with Mocha, with ES2015 imports running via `esm`. As far as possible, QUnit-specific syntax has been replaced with Mocha's `describe` and `it`, while the native Node.js `assert` module is used for assertions. Files in the `test` directory ending in `.test.js` will be treated as test files. * Add initial passing files to test run.
89 lines
2.8 KiB
JavaScript
89 lines
2.8 KiB
JavaScript
import assert from 'assert';
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import lodashStable from 'lodash';
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import { _, defineProperty, stubOne, noop, stubNaN } from './utils.js';
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describe('assign and assignIn', function() {
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lodashStable.each(['assign', 'assignIn'], function(methodName) {
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var func = _[methodName];
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it('`_.' + methodName + '` should assign source properties to `object`', function() {
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assert.deepStrictEqual(func({ 'a': 1 }, { 'b': 2 }), { 'a': 1, 'b': 2 });
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});
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it('`_.' + methodName + '` should accept multiple sources', function() {
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var expected = { 'a': 1, 'b': 2, 'c': 3 };
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assert.deepStrictEqual(func({ 'a': 1 }, { 'b': 2 }, { 'c': 3 }), expected);
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assert.deepStrictEqual(func({ 'a': 1 }, { 'b': 2, 'c': 2 }, { 'c': 3 }), expected);
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});
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it('`_.' + methodName + '` should overwrite destination properties', function() {
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var expected = { 'a': 3, 'b': 2, 'c': 1 };
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assert.deepStrictEqual(func({ 'a': 1, 'b': 2 }, expected), expected);
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});
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it('`_.' + methodName + '` should assign source properties with nullish values', function() {
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var expected = { 'a': null, 'b': undefined, 'c': null };
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assert.deepStrictEqual(func({ 'a': 1, 'b': 2 }, expected), expected);
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});
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it('`_.' + methodName + '` should skip assignments if values are the same', function() {
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var object = {};
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var descriptor = {
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'configurable': true,
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'enumerable': true,
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'set': function() { throw new Error; }
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};
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var source = {
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'a': 1,
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'b': undefined,
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'c': NaN,
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'd': undefined,
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'constructor': Object,
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'toString': lodashStable.constant('source')
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};
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defineProperty(object, 'a', lodashStable.assign({}, descriptor, {
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'get': stubOne
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}));
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defineProperty(object, 'b', lodashStable.assign({}, descriptor, {
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'get': noop
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}));
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defineProperty(object, 'c', lodashStable.assign({}, descriptor, {
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'get': stubNaN
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}));
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defineProperty(object, 'constructor', lodashStable.assign({}, descriptor, {
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'get': lodashStable.constant(Object)
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}));
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try {
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var actual = func(object, source);
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} catch (e) {}
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assert.deepStrictEqual(actual, source);
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});
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it('`_.' + methodName + '` should treat sparse array sources as dense', function() {
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var array = [1];
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array[2] = 3;
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assert.deepStrictEqual(func({}, array), { '0': 1, '1': undefined, '2': 3 });
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});
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it('`_.' + methodName + '` should assign values of prototype objects', function() {
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function Foo() {}
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Foo.prototype.a = 1;
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assert.deepStrictEqual(func({}, Foo.prototype), { 'a': 1 });
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});
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it('`_.' + methodName + '` should coerce string sources to objects', function() {
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assert.deepStrictEqual(func({}, 'a'), { '0': 'a' });
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});
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});
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});
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