75 lines
1.6 KiB
JavaScript
75 lines
1.6 KiB
JavaScript
'use strict';
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var test = require('tape').test;
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var find = require('./find.js');
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test('can find an element', function (t) {
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var arr = [1, 2, 3, 4, 5];
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var found = find(arr, function (el) {
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return el === 2;
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});
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t.equal(2, found);
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t.end();
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});
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test('can find an element from an object', function (t) {
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var arr = [{name: 'adam'}, {name: 'eve'}, {name: 'john'}];
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var found = find(arr, function (el) {
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return el.name === 'eve';
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});
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t.deepEqual({name: 'eve'}, found);
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t.end();
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});
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test('returns undefined if no callback returns true', function (t) {
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var arr = [6, 7, 8];
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var found = find(arr, function (el) {
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return el === 1;
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});
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t.equal(found, undefined);
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t.end();
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});
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test('setting object as thisArg', function (t) {
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t.plan(3);
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function Car() {}
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var car = new Car();
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var arr = [1, 2, 3];
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find(arr, function (el) {
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t.ok(this instanceof Car, 'this should be instanceof Car');
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}, car);
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});
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test('loop should exit on first find', function (t) {
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t.plan(3);
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var arr = [1, 2, 3, 4, 5];
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find(arr, function (el, index) {
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t.ok(true, 'element ' + index);
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return el === 3;
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});
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});
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test(
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'third callback argument array should be equal to first argument array',
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function (t) {
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t.plan(3);
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var arr = [1, 2, 3];
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find(arr, function (el, index, array) {
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t.deepEqual(arr, array);
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});
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}
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);
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test(
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'should throw TypeError if second argument is not a function',
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function (t) {
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t.plan(1);
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var arr = [1, 2, 3];
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try {
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find(arr, 'string');
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} catch (e) {
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t.ok(e instanceof TypeError);
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}
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}
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);
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