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* 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.
66 lines
2.1 KiB
JavaScript
66 lines
2.1 KiB
JavaScript
import assert from 'assert';
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import lodashStable from 'lodash';
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import { _, stubA, stubB, stubC, slice, stubFalse, stubTrue } from './utils.js';
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describe('cond', function() {
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it('should create a conditional function', function() {
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var cond = _.cond([
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[lodashStable.matches({ 'a': 1 }), stubA],
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[lodashStable.matchesProperty('b', 1), stubB],
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[lodashStable.property('c'), stubC]
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]);
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assert.strictEqual(cond({ 'a': 1, 'b': 2, 'c': 3 }), 'a');
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assert.strictEqual(cond({ 'a': 0, 'b': 1, 'c': 2 }), 'b');
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assert.strictEqual(cond({ 'a': -1, 'b': 0, 'c': 1 }), 'c');
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});
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it('should provide arguments to functions', function() {
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var args1,
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args2,
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expected = ['a', 'b', 'c'];
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var cond = _.cond([[
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function() { args1 || (args1 = slice.call(arguments)); return true; },
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function() { args2 || (args2 = slice.call(arguments)); }
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]]);
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cond('a', 'b', 'c');
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assert.deepStrictEqual(args1, expected);
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assert.deepStrictEqual(args2, expected);
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});
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it('should work with predicate shorthands', function() {
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var cond = _.cond([
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[{ 'a': 1 }, stubA],
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[['b', 1], stubB],
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['c', stubC]
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]);
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assert.strictEqual(cond({ 'a': 1, 'b': 2, 'c': 3 }), 'a');
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assert.strictEqual(cond({ 'a': 0, 'b': 1, 'c': 2 }), 'b');
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assert.strictEqual(cond({ 'a': -1, 'b': 0, 'c': 1 }), 'c');
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});
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it('should return `undefined` when no condition is met', function() {
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var cond = _.cond([[stubFalse, stubA]]);
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assert.strictEqual(cond({ 'a': 1 }), undefined);
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});
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it('should throw a TypeError if `pairs` is not composed of functions', function() {
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lodashStable.each([false, true], function(value) {
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assert.throws(function() { _.cond([[stubTrue, value]])(); }, TypeError);
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});
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});
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it('should use `this` binding of function for `pairs`', function() {
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var cond = _.cond([
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[function(a) { return this[a]; }, function(a, b) { return this[b]; }]
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]);
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var object = { 'cond': cond, 'a': 1, 'b': 2 };
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assert.strictEqual(object.cond('a', 'b'), 2);
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});
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});
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