mirror of
https://github.com/whoisclebs/lodash.git
synced 2026-01-31 15:27:50 +00:00
d5ef31929a
* 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.
107 lines
3.3 KiB
JavaScript
107 lines
3.3 KiB
JavaScript
import assert from 'assert';
|
|
import lodashStable from 'lodash';
|
|
import { args, _ } from './utils.js';
|
|
import flatten from '../flatten.js';
|
|
import flattenDeep from '../flattenDeep.js';
|
|
import flattenDepth from '../flattenDepth.js';
|
|
|
|
describe('flatten methods', function() {
|
|
var array = [1, [2, [3, [4]], 5]],
|
|
methodNames = ['flatten', 'flattenDeep', 'flattenDepth'];
|
|
|
|
it('should flatten `arguments` objects', function() {
|
|
var array = [args, [args]];
|
|
|
|
assert.deepStrictEqual(flatten(array), [1, 2, 3, args]);
|
|
assert.deepStrictEqual(flattenDeep(array), [1, 2, 3, 1, 2, 3]);
|
|
assert.deepStrictEqual(flattenDepth(array, 2), [1, 2, 3, 1, 2, 3]);
|
|
});
|
|
|
|
it('should treat sparse arrays as dense', function() {
|
|
var array = [[1, 2, 3], Array(3)],
|
|
expected = [1, 2, 3];
|
|
|
|
expected.push(undefined, undefined, undefined);
|
|
|
|
lodashStable.each(methodNames, function(methodName) {
|
|
var actual = _[methodName](array);
|
|
assert.deepStrictEqual(actual, expected);
|
|
assert.ok('4' in actual);
|
|
});
|
|
});
|
|
|
|
it('should flatten objects with a truthy `Symbol.isConcatSpreadable` value', function() {
|
|
if (Symbol && Symbol.isConcatSpreadable) {
|
|
var object = { '0': 'a', 'length': 1 },
|
|
array = [object],
|
|
expected = lodashStable.map(methodNames, lodashStable.constant(['a']));
|
|
|
|
object[Symbol.isConcatSpreadable] = true;
|
|
|
|
var actual = lodashStable.map(methodNames, function(methodName) {
|
|
return _[methodName](array);
|
|
});
|
|
|
|
assert.deepStrictEqual(actual, expected);
|
|
}
|
|
});
|
|
|
|
it('should work with extremely large arrays', function() {
|
|
lodashStable.times(3, function(index) {
|
|
var expected = Array(5e5);
|
|
try {
|
|
var func = flatten;
|
|
if (index == 1) {
|
|
func = flattenDeep;
|
|
} else if (index == 2) {
|
|
func = flattenDepth;
|
|
}
|
|
assert.deepStrictEqual(func([expected]), expected);
|
|
} catch (e) {
|
|
assert.ok(false, e.message);
|
|
}
|
|
});
|
|
});
|
|
|
|
it('should work with empty arrays', function() {
|
|
var array = [[], [[]], [[], [[[]]]]];
|
|
|
|
assert.deepStrictEqual(flatten(array), [[], [], [[[]]]]);
|
|
assert.deepStrictEqual(flattenDeep(array), []);
|
|
assert.deepStrictEqual(flattenDepth(array, 2), [[[]]]);
|
|
});
|
|
|
|
it('should support flattening of nested arrays', function() {
|
|
assert.deepStrictEqual(flatten(array), [1, 2, [3, [4]], 5]);
|
|
assert.deepStrictEqual(flattenDeep(array), [1, 2, 3, 4, 5]);
|
|
assert.deepStrictEqual(flattenDepth(array, 2), [1, 2, 3, [4], 5]);
|
|
});
|
|
|
|
it('should return an empty array for non array-like objects', function() {
|
|
var expected = [],
|
|
nonArray = { '0': 'a' };
|
|
|
|
assert.deepStrictEqual(flatten(nonArray), expected);
|
|
assert.deepStrictEqual(flattenDeep(nonArray), expected);
|
|
assert.deepStrictEqual(flattenDepth(nonArray, 2), expected);
|
|
});
|
|
|
|
it('should return a wrapped value when chaining', function() {
|
|
var wrapped = _(array),
|
|
actual = wrapped.flatten();
|
|
|
|
assert.ok(actual instanceof _);
|
|
assert.deepEqual(actual.value(), [1, 2, [3, [4]], 5]);
|
|
|
|
actual = wrapped.flattenDeep();
|
|
|
|
assert.ok(actual instanceof _);
|
|
assert.deepEqual(actual.value(), [1, 2, 3, 4, 5]);
|
|
|
|
actual = wrapped.flattenDepth(2);
|
|
|
|
assert.ok(actual instanceof _);
|
|
assert.deepEqual(actual.value(), [1, 2, 3, [4], 5]);
|
|
});
|
|
});
|