mirror of
https://github.com/whoisclebs/lodash.git
synced 2026-01-31 07:17:50 +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.
75 lines
2.3 KiB
JavaScript
75 lines
2.3 KiB
JavaScript
import assert from 'assert';
|
|
import lodashStable from 'lodash';
|
|
import { square } from './utils.js';
|
|
import chain from '../chain.js';
|
|
|
|
describe('chain', function() {
|
|
it('should return a wrapped value', function() {
|
|
var actual = chain({ 'a': 0 });
|
|
assert.ok(actual instanceof _);
|
|
});
|
|
|
|
it('should return existing wrapped values', function() {
|
|
var wrapped = _({ 'a': 0 });
|
|
assert.strictEqual(chain(wrapped), wrapped);
|
|
assert.strictEqual(wrapped.chain(), wrapped);
|
|
});
|
|
|
|
it('should enable chaining for methods that return unwrapped values', function() {
|
|
var array = ['c', 'b', 'a'];
|
|
|
|
assert.ok(chain(array).head() instanceof _);
|
|
assert.ok(_(array).chain().head() instanceof _);
|
|
|
|
assert.ok(chain(array).isArray() instanceof _);
|
|
assert.ok(_(array).chain().isArray() instanceof _);
|
|
|
|
assert.ok(chain(array).sortBy().head() instanceof _);
|
|
assert.ok(_(array).chain().sortBy().head() instanceof _);
|
|
});
|
|
|
|
it('should chain multiple methods', function() {
|
|
lodashStable.times(2, function(index) {
|
|
var array = ['one two three four', 'five six seven eight', 'nine ten eleven twelve'],
|
|
expected = { ' ': 9, 'e': 14, 'f': 2, 'g': 1, 'h': 2, 'i': 4, 'l': 2, 'n': 6, 'o': 3, 'r': 2, 's': 2, 't': 5, 'u': 1, 'v': 4, 'w': 2, 'x': 1 },
|
|
wrapped = index ? _(array).chain() : chain(array);
|
|
|
|
var actual = wrapped
|
|
.chain()
|
|
.map(function(value) { return value.split(''); })
|
|
.flatten()
|
|
.reduce(function(object, chr) {
|
|
object[chr] || (object[chr] = 0);
|
|
object[chr]++;
|
|
return object;
|
|
}, {})
|
|
.value();
|
|
|
|
assert.deepStrictEqual(actual, expected);
|
|
|
|
array = [1, 2, 3, 4, 5, 6];
|
|
wrapped = index ? _(array).chain() : chain(array);
|
|
actual = wrapped
|
|
.chain()
|
|
.filter(function(n) { return n % 2 != 0; })
|
|
.reject(function(n) { return n % 3 == 0; })
|
|
.sortBy(function(n) { return -n; })
|
|
.value();
|
|
|
|
assert.deepStrictEqual(actual, [5, 1]);
|
|
|
|
array = [3, 4];
|
|
wrapped = index ? _(array).chain() : chain(array);
|
|
actual = wrapped
|
|
.reverse()
|
|
.concat([2, 1])
|
|
.unshift(5)
|
|
.tap(function(value) { value.pop(); })
|
|
.map(square)
|
|
.value();
|
|
|
|
assert.deepStrictEqual(actual, [25, 16, 9, 4]);
|
|
});
|
|
});
|
|
});
|