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Home PHP Framework Laravel Laravel development: How to use Laravel Testing for unit testing?

Laravel development: How to use Laravel Testing for unit testing?

Jun 13, 2023 am 10:03 AM
unit test develop laravel testing

With the continuous development of the Laravel framework, unit testing has become an indispensable part of modern programming. Unit testing can ensure that our code has stable behavior under different operating environments, greatly reducing the probability of program errors. In Laravel, we can use Laravel Testing for unit testing. This article will introduce how to use Laravel Testing for unit testing.

  1. Installing Laravel

Before unit testing, we need to install a Laravel project for testing. Laravel can be installed using the following command:

composer create-project --prefer-dist laravel/laravel blog

  1. Create test file

In Laravel , we can create a test file by running the following command:

php artisan make:test ExampleTest

This will generate an ExampleTest.php file in the tests directory. We can write test cases in it.

  1. Writing test cases

Next, we need to write test cases. We can write test cases in ExampleTest:

public function testBasicTest()
{
    $response = $this->get('/');

    $response->assertStatus(200);
}

In the above test case, we initiate a GET request to the application and check whether the response status is 200.

  1. Run the test

Next, we can run the test via the following command:

php artisan test

If all tests If the use cases pass, this command will return a success status.

  1. Assertions

When writing test cases, we can use assertions to check whether the code behaves as expected. Laravel Testing provides several types of assertions.

In the above example, we used assertStatus(200) assertion. This assertion checks whether the response status is 200. If the status is not 200, the test will fail. In addition to this, there are many other assertions that can be used for testing.

  1. Mock requests

In testing, it is fairly common to mock requests and responses. Laravel Testing provides many methods to simulate requests. For example:

// GET請(qǐng)求
$response = $this->get('/path');

// POST請(qǐng)求
$response = $this->post('/path', [
    'name' => 'value',
]);

// PUT請(qǐng)求
$response = $this->put('/path', [
    'name' => 'value',
]);

// DELETE請(qǐng)求
$response = $this->delete('/path');
  1. Data Provider

When writing test cases, sometimes we need to test different data sets. We can use Laravel Testing's data provider to achieve this purpose. For example:

/**
 * @dataProvider additionProvider
 */
public function testAddition($a, $b, $expected)
{
    $this->assertEquals($expected, $a + $b);
}

public function additionProvider()
{
    return [
        [0, 0, 0],
        [0, 1, 1],
        [1, 1, 2],
    ];
}

In the above example, we used a data provider to test different data sets.

Summary

This article introduces how to use Laravel Testing for unit testing. Unit testing can ensure that our code has stable behavior under different operating environments, greatly reducing the probability of program errors. When writing test cases, we can use the various types of assertions and data providers provided by Laravel Testing to implement different testing requirements.

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