oliverdavies.uk/content/node.da3412f8-9a33-4395-a75e-4d107d2557a4.yml

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title:
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Writing custom assertions in your tests
created:
- value: '2023-08-17T00:00:00+00:00'
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<p>Writing custom assertions is a great way to clean up your test code.</p>
<p>Here's an example from one of my client Drupal projects:</p>
<pre><code class="language-php">private static function assertProductVariationHasPrice(ProductVariationInterface $productVariation, string $expectedPrice): void {
self::assertSame(
actual: $productVariation-&gt;getPrice()-&gt;getNumber(),
expected: $expectedPrice,
);
}
</code></pre>
<p>This one wraps a single assertion, but they could also include multiple assertions or additional steps.</p>
<h2 id="here%27s-the-thing">Here's the thing</h2>
<p>A custom assertion is a simple function but it makes the test code more readable and less repetitive.</p>
format: full_html
processed: |
<p>Writing custom assertions is a great way to clean up your test code.</p>
<p>Here's an example from one of my client Drupal projects:</p>
<pre><code class="language-php">private static function assertProductVariationHasPrice(ProductVariationInterface $productVariation, string $expectedPrice): void {
self::assertSame(
actual: $productVariation-&gt;getPrice()-&gt;getNumber(),
expected: $expectedPrice,
);
}
</code></pre>
<p>This one wraps a single assertion, but they could also include multiple assertions or additional steps.</p>
<h2 id="here%27s-the-thing">Here's the thing</h2>
<p>A custom assertion is a simple function but it makes the test code more readable and less repetitive.</p>
summary: null
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