Traits Laravel Package

Getting Started

Install via Composer: composer require --dev phpunitgoodpractices/traits. No extra configuration required. Start by selecting one or two traits (e.g., AssertsArraySubset, AssertsContains, or AssertsThat) and mix them into your TestCase class:

use PHPUnit\Framework\TestCase;
use PHPUnitGoodPractices\Traits\AssertsContains;
use PHPUnitGoodPractices\Traits\AssertsThat;

class MyTestCase extends TestCase
{
    use AssertsContains;
    use AssertsThat;
}

Then write expressive assertions like $this->assertContains('foo', $array) or $this->assertThat($user, $this->isInstanceOf(User::class)). Begin with traits that replace verbose built-in assertions or improve readability (e.g., AssertsEmpty, AssertsTrue, AssertsFalse).

Implementation Patterns

• Standardize assertions: Adopt a small set of traits across your project (e.g., via a base TestCase) to enforce consistency (e.g., always use assertArrayHasKey via AssertsArrayHasKey).
• Domain-specific traits: Create your own traits that wrap these for project-specific semantics (e.g., AssertsApiResponse that composes AssertsContains and AssertsJsonSubset).
• Incremental adoption: Apply traits selectively—update existing tests incrementally as you modify them, avoiding large refactors.
• Combine with custom predicates: Use assertThat() for custom matchers and chain expectations for more fluent APIs (e.g., $this->assertThat($response, $this->statusCode(201)) if supported).
• Base test class composition: Create a single BaseTestCase that uses the recommended traits, then inherit from it across your suite.

Gotchas and Tips

• Trait method collisions: If your TestCase or other traits define methods/properties with the same name (e.g., assertContains), PHP will throw a fatal error. Use as to alias conflicting traits: use AssertsContains { assertContains as public traitAssertContains; }.
• Overuse vs clarity: While traits improve consistency, don’t replace expressive built-in methods with less familiar ones—e.g., prefer $this->assertTrue($bool) over $this->assertThat($bool, $this->isTrue()) unless your team agrees on a convention.
• No autoloading quirks: Since it’s just traits, Composer autoloads them normally—but ensure your TestCase classes use the correct use statements (autocompletion tools like PHPStan may require explicit declarations).
• Limited active support: The package was archived in 2022—review its source on GitHub to verify trait behavior and check for community forks if stability is critical. Most traits are thin wrappers around PHPUnit’s core assertions, so risk is low.
• Extend safely: Override trait methods in your TestCase to add logging, custom context, or deprecation warnings—but be cautious about backward-compatibility in assertions.