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lodash/test/intersectionBy.js
Benjamin Tan d5ef31929a Add initial test files from lodash v4. (#4172)
* 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.
2019-02-12 09:11:32 -08:00

24 lines
692 B
JavaScript

import assert from 'assert';
import { slice } from './utils.js';
import intersectionBy from '../intersectionBy.js';
describe('intersectionBy', function() {
it('should accept an `iteratee`', function() {
var actual = intersectionBy([2.1, 1.2], [2.3, 3.4], Math.floor);
assert.deepStrictEqual(actual, [2.1]);
actual = intersectionBy([{ 'x': 1 }], [{ 'x': 2 }, { 'x': 1 }], 'x');
assert.deepStrictEqual(actual, [{ 'x': 1 }]);
});
it('should provide correct `iteratee` arguments', function() {
var args;
intersectionBy([2.1, 1.2], [2.3, 3.4], function() {
args || (args = slice.call(arguments));
});
assert.deepStrictEqual(args, [2.3]);
});
});