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