48 lines
2.1 KiB
Markdown
48 lines
2.1 KiB
Markdown
# Vector4EqualityComparer
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Use this class to compare two [Vector4](https://docs.unity3d.com/ScriptReference/Vector4.html) objects for equality with [NUnit](http://www.nunit.org/) constraints. Call `Vector4EqualityComparer.Instance` to perform comparisons using default calculation error value 0.0001f. To set a custom test value, instantiate a new comparer using the [one argument constructor](#constructor).
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## Static Properties
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| Syntax | Description |
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| ---------------------------------- | ------------------------------------------------------------ |
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| `Vector4EqualityComparer Instance` | A comparer instance with the default calculation error value set to 0.0001f. |
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## Constructors
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| Syntax | Description |
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| --------------------------------------------- | ---------------------------------------------- |
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| `Vector4EqualityComparer(float allowedError)` | Creates an instance with a custom error value. |
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## Public methods
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| Syntax | Description |
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| ------------------------------------------------ | ------------------------------------------------------------ |
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| `bool Equals(Vector4 expected, Vector4 actual);` | Compares the `actual` and `expected` `Vector4` objects for equality using [Utils.AreFloatsEqual](http://todo) to compare the `x`, `y`, `z`, and `w` attributes of `Vector4`. |
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## Example
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```c#
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[TestFixture]
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public class Vector4Test
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{
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[Test]
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public void VerifyThat_TwoVector4ObjectsAreEqual()
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{
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// Custom error 10e-6f
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var actual = new Vector4(0, 0, 1e-6f, 1e-6f);
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var expected = new Vector4(1e-6f, 0f, 0f, 0f);
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var comparer = new Vector4EqualityComparer(10e-6f);
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Assert.That(actual, Is.EqualTo(expected).Using(comparer));
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// Default error 0.0001f
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actual = new Vector4(0.01f, 0.01f, 0f, 0f);
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expected = new Vector4(0.01f, 0.01f, 0f, 0f);
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Assert.That(actual, Is.EqualTo(expected).Using(Vector4EqualityComparer.Instance));
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}
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}
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```
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