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Add basic _.cond test and test for undefined return values.

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This commit is contained in:
John-David Dalton
2016-01-03 21:18:31 -06:00
parent b1ba01e85a
commit e7b8fd8281
1 changed files with 31 additions and 12 deletions
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43
test/test.js
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@@ -2807,28 +2807,47 @@
QUnit.module('lodash.cond');
(function() {
QUnit.test('should throw a TypeError if `pairs` is not composed of functions', function(assert) {
assert.expect(2);
QUnit.test('should create a conditional function', function(assert) {
assert.expect(3);
var predicate = lodashStable.constant(true);
var cond = _.cond([
[lodashStable.matches({ 'a': 1 }), alwaysA],
[lodashStable.matchesProperty('b', 1), alwaysB],
[lodashStable.property('c'), alwaysC]
]);
lodashStable.each([true, false], function(value) {
assert.raises(function() { _.cond([[predicate, value]]); }, TypeError);
});
assert.strictEqual(cond({ 'a': 1, 'b': 2, 'c': 3 }), 'a');
assert.strictEqual(cond({ 'a': 0, 'b': 1, 'c': 2 }), 'b');
assert.strictEqual(cond({ 'a': -1, 'b': 0, 'c': 1 }), 'c');
});
QUnit.test('should work with predicate shorthands', function(assert) {
assert.expect(3);
var cond = _.cond([
[{ 'a': 1 }, lodashStable.constant('A')],
[['b', 1], lodashStable.constant('B')],
['c', lodashStable.constant('C')]
[{ 'a': 1 }, alwaysA],
[['b', 1], alwaysB],
['c', alwaysC]
]);
assert.strictEqual(cond({ 'a': 1, 'b': 2, 'c': 3 }), 'A');
assert.strictEqual(cond({ 'a': 0, 'b': 1, 'c': 2 }), 'B');
assert.strictEqual(cond({ 'a': -1, 'b': 0, 'c': 1 }), 'C');
assert.strictEqual(cond({ 'a': 1, 'b': 2, 'c': 3 }), 'a');
assert.strictEqual(cond({ 'a': 0, 'b': 1, 'c': 2 }), 'b');
assert.strictEqual(cond({ 'a': -1, 'b': 0, 'c': 1 }), 'c');
});
QUnit.test('should return `undefined` when no condition is met', function(assert) {
assert.expect(1);
var cond = _.cond([[alwaysFalse, alwaysA]]);
assert.strictEqual(cond({ 'a': 1 }), undefined);
});
QUnit.test('should throw a TypeError if `pairs` is not composed of functions', function(assert) {
assert.expect(2);
lodashStable.each([true, false], function(value) {
assert.raises(function() { _.cond([[alwaysTrue, value]])(); }, TypeError);
});
});
}());