Innovenergy_trunk/frontend/node_modules/array-find/test.js

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'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);
}
}
);