ci-phpunit-test for CodeIgniter 3.x

An easier way to use PHPUnit with CodeIgniter 3.x.

You don't have to modify CodeIgniter core files at all.
You can write controller tests easily.
Nothing is untestable, maybe.
Well documented.

Requirements

PHP 7.3 or later
- If you use Monkey Patching, you must use PHP-Parser 4.2 or later as a Composer dependency.
CodeIgniter 3.x
- If you want to upgrade to CodeIgniter4, see #361.
PHPUnit 9.3 or later
- If you want to use PHPUnit 9.2 or earlier, please use ci-phpunit-test 2.x.

Optional

NetBeans
- Go to Project Properties > Testing > PHPUnit, check Use Custom Test Suite checkbox, and select application/tests/_ci_phpunit_test/TestSuiteProvider.php.

Change Log

See Change Log.

Folder Structure

codeigniter/
├── application/
│   └── tests/
│        ├── _ci_phpunit_test/ ... don't touch! files ci-phpunit-test uses
│        ├── Bootstrap.php     ... bootstrap file for PHPUnit
│        ├── DbTestCase.php    ... DbTestCase class
│        ├── TestCase.php      ... TestCase class
│        ├── controllers/      ... put your controller tests
│        ├── libraries/        ... put your library tests
│        ├── mocks/
│        │   └── libraries/    ... mock libraries
│        ├── models/           ... put your model tests
│        └── phpunit.xml       ... config file for PHPUnit
└── vendor/

Installation

Manual Installation

Download latest ci-phpunit-test from https://github.com/kenjis/ci-phpunit-test/releases.
Unzip and copy application/tests folder into your application folder in CodeIgniter project.

That's it.

Composer Installation

$ cd /path/to/codeigniter/
$ composer require kenjis/ci-phpunit-test:^3.0 --dev

And run install.php:

$ php vendor/kenjis/ci-phpunit-test/install.php --from-composer

The above command always overwrites existing files.
You must run it at CodeIgniter project root folder.
You can specify your application and public folder with option arguments, if you use custom folder paths.

$ php vendor/kenjis/ci-phpunit-test/install.php -a <application_dir> -p <public_dir> -t <unittest_dir>

So the default would be:

$ php vendor/kenjis/ci-phpunit-test/install.php -a application -p public -t application/tests

But some paths may be not correct, in that case, please fix them in tests/Bootstrap.php.

Upgrading

Manual Upgrading

Download latest ci-phpunit-test from https://github.com/kenjis/ci-phpunit-test/releases.
Unzip and replace application/tests/_ci_phpunit_test folder.
Read Change Log.

Composer Upgrading

$ cd /path/to/codeigniter/
$ composer update kenjis/ci-phpunit-test

Read Change Log.

If you want to remove application/test/_ci_phpunit_test/

If you're upgrading from a previous version of ci-phpunit-test that created an application/test/_ci_phpunit_test directory and now want to directly use ci-phpunit-test from Composer, you have a couple of additional steps:

Delete the old test library directory:

$ rm -rf /path/to/codeigniter/application/tests/_ci_phpunit_test

Edit the application/tests/Bootstrap.php file. At the bottom of the "set the main path constants" section, add the following:
```
define('CI_PHPUNIT_TESTPATH', implode(
    DIRECTORY_SEPARATOR,
    [dirname(APPPATH), 'vendor', 'kenjis', 'ci-phpunit-test', 'application', 'tests', '_ci_phpunit_test']
).DIRECTORY_SEPARATOR);
```
And replace any references to __DIR__ . '/_ci_phpunit_test/ or TESTPATH . '_ci_phpunit_test with CI_PHPUNIT_TESTPATH . '. (So, for example, __DIR__ . '/_ci_phpunit_test/CIPHPUnitTest.php' would become CI_PHPUNIT_TESTPATH . '/CIPHPUnitTest.php'.)

How to Run Tests

You need to install PHPUnit before running tests.

If you use Composer:

$ composer require phpunit/phpunit --dev

Run All Tests

$ cd /path/to/codeigniter/
$ vendor/bin/phpunit -c application/tests/
PHPUnit 9.5.4 by Sebastian Bergmann and contributors.

...                                                                 3 / 3 (100%)

Time: 00:00.102, Memory: 12.00 MB

OK (3 tests, 3 assertions)

Generating code coverage report in Clover XML format ... done [00:00.002]

Generating code coverage report in HTML format ... done [00:00.012]

To generate coverage report, Xdebug is needed.

Run a Single Test

If you want to run a single test case file:

$ vendor/bin/phpunit -c application/tests/ application/tests/models/Category_model_test.php

How to Write Tests

As an example, a test case class for Inventory_model would be as follows:

<?php

class Inventory_model_test extends TestCase
{
    public function setUp(): void
    {
        $this->resetInstance();
        $this->CI->load->model('Inventory_model');
        $this->obj = $this->CI->Inventory_model;
    }

    public function test_get_category_list()
    {
        $expected = [
            1 => 'Book',
            2 => 'CD',
            3 => 'DVD',
        ];
        $list = $this->obj->get_category_list();
        foreach ($list as $category) {
            $this->assertEquals($expected[$category->id], $category->name);
        }
    }

    public function test_get_category_name()
    {
        $actual = $this->obj->get_category_name(1);
        $expected = 'Book';
        $this->assertEquals($expected, $actual);
    }
}

As an example, a test case class for Welcome controller would be as follows:

<?php

class Welcome_test extends TestCase
{
    public function test_index()
    {
        $output = $this->request('GET', 'welcome/index');
        $this->assertStringContainsString(
            '<title>Welcome to CodeIgniter</title>', $output
        );
    }
}