Unit test for helpers Ember-cli - unit-testing

Question

When I create a new helper on Ember CLI, a test is created inside tests/unit/helpers. I would like to know how to test this helpers using the unit test?. I tried to find a documentation, but nothing helps. I need to test the function createArray in order to pass the test coverage to a 100%.
Now, this is my helper:
import Ember from 'ember';
export function createArray(array) {
return array;
}
export default Ember.Helper.helper(createArray);
This is my unit test: tests/unit/helpers/create-array-test.js
module('Unit | Helper | create array');
// Replace this with your real tests.
test('it works', function(assert) {
let result = createArray([42]);
assert.ok(result);
});
Hope someone can guide me.

Answer 1

What version of Ember CLI are you using? The blueprint should generate a test file with an import of the named export so you can use it directly.
What export function createArray does is create a named export named createArray. This means you can import the function directly and use it like you a normal function:
import { createArray } from 'app-name/helpers/create-array'
createArray(arrayOfArguments);
I modified #ykaragol's Twiddle to demonstrate how to do this in a test:
import { createArray } from 'app-name/helpers/create-array';
import { module, test } from 'qunit';
module('Unit | Helper | create array');
test('it works', function(assert) {
let result = createArray([42]);
assert.ok(result);
});
Replace app-name with the name of your application.

Answer 2

The code posted on twiddle helped me understand how to solve the helpers unit test. This is how I tested it, and it works like a charm.
test('Return the argument is passed', function(assert) {
assert.ok(createArray([8,4,5,6]));
assert.ok(createArray(['test1','test2','test3']));
});