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Assert DOM Elements in Laravel Tests

The Laravel DOM Assertions package by René Sinnbeck adds document object model (DOM) assertion helpers to Laravel’s TestResponse class:

This package provides some extra assertion helpers to use in HTTP Tests. If you have ever needed more control over your view assertions than assertSeeassertSeeInOrderassertSeeTextassertSeeTextInOrderassertDontSee, and assertDontSeeText then this is the package for you.

The package’s README has an example of asserting a navigation menu to ensure the correct li element has an active class, but also ensure the “Home” li element does not:

 1$this->get(route('about')) 2    ->assertOk() 3    ->assertElementExists('nav > ul', function(AssertElement $ul) { 4        $ul->contains('li', [ 5            'class' => 'active', 6            'text' => 'About' 7        ]); 8        $ul->doesntContain('li', [ 9            'class' => 'active',10            'text' => 'Home'11        ]);12    });

The snippet illustrates the granular control provided by this package, including testing DOM elements, nested elements, forms, and more. At the time of the writing, this package’s main assertions include:

  • Assert if an element exists
  • Assert if an element has a given attribute
  • Assert if an element contains in another element
  • Assert that an element does not contain another element
  • Find an element to process further assertions
  • Assert if a form exists
  • Assert that a form has a CSRF token
  • Assert for select options

You can learn more about this package, get full installation instructions, and view the source code on GitHub.

As a side note, this package’s source code has an example of using the macroable mixin method to add multiple macro methods into another object from a service provider, which might be a helpful inspiration for others writing packages for Laravel.

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