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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.
65 lines
2.1 KiB
JavaScript
65 lines
2.1 KiB
JavaScript
import assert from 'assert';
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import lodashStable from 'lodash';
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import { noop, identity, isNpm, mapCaches } from './utils.js';
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import mergeWith from '../mergeWith.js';
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import last from '../last.js';
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describe('mergeWith', function() {
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it('should handle merging when `customizer` returns `undefined`', function() {
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var actual = mergeWith({ 'a': { 'b': [1, 1] } }, { 'a': { 'b': [0] } }, noop);
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assert.deepStrictEqual(actual, { 'a': { 'b': [0, 1] } });
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actual = mergeWith([], [undefined], identity);
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assert.deepStrictEqual(actual, [undefined]);
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});
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it('should clone sources when `customizer` returns `undefined`', function() {
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var source1 = { 'a': { 'b': { 'c': 1 } } },
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source2 = { 'a': { 'b': { 'd': 2 } } };
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mergeWith({}, source1, source2, noop);
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assert.deepStrictEqual(source1.a.b, { 'c': 1 });
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});
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it('should defer to `customizer` for non `undefined` results', function() {
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var actual = mergeWith({ 'a': { 'b': [0, 1] } }, { 'a': { 'b': [2] } }, function(a, b) {
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return lodashStable.isArray(a) ? a.concat(b) : undefined;
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});
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assert.deepStrictEqual(actual, { 'a': { 'b': [0, 1, 2] } });
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});
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it('should provide `stack` to `customizer`', function() {
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var actual;
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mergeWith({}, { 'a': { 'b': 2 } }, function() {
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actual = last(arguments);
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});
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assert.ok(isNpm
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? actual.constructor.name == 'Stack'
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: actual instanceof mapCaches.Stack
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);
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});
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it('should overwrite primitives with source object clones', function() {
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var actual = mergeWith({ 'a': 0 }, { 'a': { 'b': ['c'] } }, function(a, b) {
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return lodashStable.isArray(a) ? a.concat(b) : undefined;
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});
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assert.deepStrictEqual(actual, { 'a': { 'b': ['c'] } });
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});
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it('should pop the stack of sources for each sibling property', function() {
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var array = ['b', 'c'],
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object = { 'a': ['a'] },
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source = { 'a': array, 'b': array };
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var actual = mergeWith(object, source, function(a, b) {
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return lodashStable.isArray(a) ? a.concat(b) : undefined;
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});
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assert.deepStrictEqual(actual, { 'a': ['a', 'b', 'c'], 'b': ['b', 'c'] });
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});
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});
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