47 lines
1.3 KiB
JavaScript
47 lines
1.3 KiB
JavaScript
|
/* eslint-disable space-before-function-paren, no-var, padded-blocks */
|
||
|
|
|
||
|
|
/*= require extensions/array */
|
||
|
|
|
||
|
|
(function() {
|
||
|
|
describe('Array extensions', function() {
|
||
|
|
describe('first', function() {
|
||
|
|
return it('returns the first item', function() {
|
||
|
|
var arr;
|
||
|
|
arr = [0, 1, 2, 3, 4, 5];
|
||
|
|
return expect(arr.first()).toBe(0);
|
||
|
|
});
|
||
|
|
});
|
||
|
|
describe('last', function() {
|
||
|
|
return it('returns the last item', function() {
|
||
|
|
var arr;
|
||
|
|
arr = [0, 1, 2, 3, 4, 5];
|
||
|
|
return expect(arr.last()).toBe(5);
|
||
|
|
});
|
||
|
|
});
|
||
|
|
|
||
|
|
describe('find', function () {
|
||
|
|
beforeEach(() => {
|
||
|
|
this.arr = [0, 1, 2, 3, 4, 5];
|
||
|
|
});
|
||
|
|
|
||
|
|
it('returns the item that first passes the predicate function', () => {
|
||
|
|
expect(this.arr.find(item => item === 2)).toBe(2);
|
||
|
|
});
|
||
|
|
|
||
|
|
it('returns undefined if no items pass the predicate function', () => {
|
||
|
|
expect(this.arr.find(item => item === 6)).not.toBeDefined();
|
||
|
|
});
|
||
|
|
|
||
|
|
it('error when called on undefined or null', () => {
|
||
|
|
expect(Array.prototype.find.bind(undefined, item => item === 1)).toThrow();
|
||
|
|
expect(Array.prototype.find.bind(null, item => item === 1)).toThrow();
|
||
|
|
});
|
||
|
|
|
||
|
|
it('error when predicate is not a function', () => {
|
||
|
|
expect(Array.prototype.find.bind(this.arr, 1)).toThrow();
|
||
|
|
});
|
||
|
|
});
|
||
|
|
});
|
||
|
|
|
||
|
|
}).call(this);
|