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.
120 lines
3.3 KiB
JavaScript
120 lines
3.3 KiB
JavaScript
import assert from 'assert';
|
|
import lodashStable from 'lodash';
|
|
|
|
import {
|
|
empties,
|
|
stubTrue,
|
|
slice,
|
|
symbol,
|
|
args,
|
|
push,
|
|
arrayProto,
|
|
realm,
|
|
MAX_SAFE_INTEGER,
|
|
} from './utils.js';
|
|
|
|
import isEmpty from '../isEmpty.js';
|
|
|
|
describe('isEmpty', function() {
|
|
it('should return `true` for empty values', function() {
|
|
var expected = lodashStable.map(empties, stubTrue),
|
|
actual = lodashStable.map(empties, isEmpty);
|
|
|
|
assert.deepStrictEqual(actual, expected);
|
|
|
|
assert.strictEqual(isEmpty(true), true);
|
|
assert.strictEqual(isEmpty(slice), true);
|
|
assert.strictEqual(isEmpty(1), true);
|
|
assert.strictEqual(isEmpty(NaN), true);
|
|
assert.strictEqual(isEmpty(/x/), true);
|
|
assert.strictEqual(isEmpty(symbol), true);
|
|
assert.strictEqual(isEmpty(), true);
|
|
|
|
if (Buffer) {
|
|
assert.strictEqual(isEmpty(new Buffer(0)), true);
|
|
assert.strictEqual(isEmpty(new Buffer(1)), false);
|
|
}
|
|
});
|
|
|
|
it('should return `false` for non-empty values', function() {
|
|
assert.strictEqual(isEmpty([0]), false);
|
|
assert.strictEqual(isEmpty({ 'a': 0 }), false);
|
|
assert.strictEqual(isEmpty('a'), false);
|
|
});
|
|
|
|
it('should work with an object that has a `length` property', function() {
|
|
assert.strictEqual(isEmpty({ 'length': 0 }), false);
|
|
});
|
|
|
|
it('should work with `arguments` objects', function() {
|
|
assert.strictEqual(isEmpty(args), false);
|
|
});
|
|
|
|
it('should work with prototype objects', function() {
|
|
function Foo() {}
|
|
Foo.prototype = { 'constructor': Foo };
|
|
|
|
assert.strictEqual(isEmpty(Foo.prototype), true);
|
|
|
|
Foo.prototype.a = 1;
|
|
assert.strictEqual(isEmpty(Foo.prototype), false);
|
|
});
|
|
|
|
it('should work with jQuery/MooTools DOM query collections', function() {
|
|
function Foo(elements) {
|
|
push.apply(this, elements);
|
|
}
|
|
Foo.prototype = { 'length': 0, 'splice': arrayProto.splice };
|
|
|
|
assert.strictEqual(isEmpty(new Foo([])), true);
|
|
});
|
|
|
|
it('should work with maps', function() {
|
|
if (Map) {
|
|
lodashStable.each([new Map, realm.map], function(map) {
|
|
assert.strictEqual(isEmpty(map), true);
|
|
map.set('a', 1);
|
|
assert.strictEqual(isEmpty(map), false);
|
|
map.clear();
|
|
});
|
|
}
|
|
});
|
|
|
|
it('should work with sets', function() {
|
|
if (Set) {
|
|
lodashStable.each([new Set, realm.set], function(set) {
|
|
assert.strictEqual(isEmpty(set), true);
|
|
set.add(1);
|
|
assert.strictEqual(isEmpty(set), false);
|
|
set.clear();
|
|
});
|
|
}
|
|
});
|
|
|
|
it('should not treat objects with negative lengths as array-like', function() {
|
|
function Foo() {}
|
|
Foo.prototype.length = -1;
|
|
|
|
assert.strictEqual(isEmpty(new Foo), true);
|
|
});
|
|
|
|
it('should not treat objects with lengths larger than `MAX_SAFE_INTEGER` as array-like', function() {
|
|
function Foo() {}
|
|
Foo.prototype.length = MAX_SAFE_INTEGER + 1;
|
|
|
|
assert.strictEqual(isEmpty(new Foo), true);
|
|
});
|
|
|
|
it('should not treat objects with non-number lengths as array-like', function() {
|
|
assert.strictEqual(isEmpty({ 'length': '0' }), false);
|
|
});
|
|
|
|
it('should return an unwrapped value when implicitly chaining', function() {
|
|
assert.strictEqual(_({}).isEmpty(), true);
|
|
});
|
|
|
|
it('should return a wrapped value when explicitly chaining', function() {
|
|
assert.ok(_({}).chain().isEmpty() instanceof _);
|
|
});
|
|
});
|