60 lines
1.7 KiB
Markdown
60 lines
1.7 KiB
Markdown
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---
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title: >
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What's the simplest test to begin with?
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pubDate: 2023-09-07
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permalink: >-
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archive/2023/09/07/what-s-the-simplest-test-to-begin-with
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tags:
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- software-development
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- automated-testing
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- test-driven-development
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- php
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- drupal
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---
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When giving talks and workshops or coaching on automated testing and test-driven development, some people may not have written tests before and aren't familiar with the structure or know where to begin.
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In the workshops I ran for DrupalCamp London and DrupalCamp NYC, I wanted to cover this first before writing any implementation code.
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Where do you put a test class, and what does it contain?
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How do you run the tests, and how can you make it pass or fail?
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## What we did
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To start, we wrote a test for existing functionality within Drupal core - anonymous users can visit the front page.
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This is the whole test:
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```php
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<?php
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namespace Drupal\Tests\my_module\Functional;
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use Drupal\Tests\BrowserTestBase;
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use Symfony\Component\HttpFoundation\Response;
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class MyModuleTest extends BrowserTestBase {
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protected $defaultTheme = 'stark';
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/** @test */
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public function the_front_page_loads_for_anonymous_users() {
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$this->drupalGet('<front>');
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$this->assertResponse(Response::HTTP_OK);
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}
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}
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```
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This is a test someone can write, run and see the test pass.
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They can then experiment by changing the values to make the test fail in different ways.
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## What next?
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Then, we tested anonymous users cannot access the administration pages, which is also already the case in Drupal core, and then authenticated users with the correct permissions could access them.
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People were getting the idea by now, and we moved on to writing and testing some of our own code.
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