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/* eslint-disable space-before-function-paren, no-var */
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(window);
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