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33 lines
2.0 KiB
Markdown
33 lines
2.0 KiB
Markdown
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# Custom equality comparers
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To enable easier verification of custom Unity type values in your tests we provide you with some custom equality comparers:
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* [ColorEqualityComparer](./reference-comparer-color.md)
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* [FloatEqualityComparer](./reference-comparer-float.md)
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* [QuaternionEqualityComparer](./reference-comparer-quaternion.md)
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* [Vector2EqualityComparer](./reference-comparer-vector2.md)
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* [Vector3EqualityComparer](./reference-comparer-vector3.md)
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* [Vector4EqualityComparer](./reference-comparer-vector4.md)
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Use these classes to compare two objects of the same type for equality within the range of a given tolerance using [NUnit ](https://github.com/nunit/docs/wiki/Constraints)or [custom constraints](./reference-custom-constraints.md) . Call Instance to apply the default calculation error value to the comparison. To set a specific error value, instantiate a new comparer object using a one argument constructor `ctor(float error)`.
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## Static properties
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| Syntax | Description |
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| ---------- | ------------------------------------------------------------ |
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| `Instance` | A singleton instance of the comparer with a predefined default error value. |
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## Constructors
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| Syntax | Description |
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| ------------------- | ------------------------------------------------------------ |
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| `ctor(float error)` | Creates an instance of comparer with a custom error `value.allowedError`. The relative error to be considered while comparing two values. |
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## Public methods
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| Syntax | Description |
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| ------------------------------------ | ------------------------------------------------------------ |
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| `bool Equals(T expected, T actual);` | Compares the actual and expected objects for equality using a custom comparison mechanism. Returns `true` if expected and actual objects are equal, otherwise it returns `false`. |
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