Files
lodash/test/once.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

37 lines
718 B
JavaScript

import assert from 'assert';
import { _ } from './utils.js';
describe('once', function() {
it('should invoke `func` once', function() {
var count = 0,
once = _.once(function() { return ++count; });
once();
assert.strictEqual(once(), 1);
assert.strictEqual(count, 1);
});
it('should ignore recursive calls', function() {
var count = 0;
var once = _.once(function() {
once();
return ++count;
});
assert.strictEqual(once(), 1);
assert.strictEqual(count, 1);
});
it('should not throw more than once', function() {
var once = _.once(function() {
throw new Error;
});
assert.throws(once);
once();
assert.ok(true);
});
});