Assert.IsNotNull not working for texture

[The-Oddler]

When I use:

Assert.IsNotNull(_texture, "Missing texture.");
Assert.IsFalse(_texture== null, "Missing texture.");

With my “_texture” variable not set in the inspector, the first assert isn’t fired. Only the second one is. So for some reason IsNotNull doesn’t work for textures.

I tried “IsNotNull(null)” and that does work, so it seems to be a problem with textures.

Perhaps this is a bug? Or am I missing something?

[kru]

Unity overrides the equality operator (==) for objects that derive from UnityEngine.Object. _texture has a reference to a C# object. That reference is real, and if you compare System.Object equality, by casting _texture to a System.Object, you will see that ((System.Object)_texture) == null is false.

However, the c# object that _texture references is a UnityEngine.Object. So _texture == null invokes the overloaded Unity equality check, which returns true because the internal engine counterpart to the c# object doesn’t exist for whatever internal reason.

Unity’s overloaded equality operator is evil.

[The-Oddler]

@kru

Unity overrides the equality operator (==) for objects that derive from UnityEngine.Object. _texture has a reference to a C# object. That reference is real, and if you compare System.Object equality, by casting _texture to a System.Object, you will see that ((System.Object)_texture) == null is false.

However, the c# object that _texture references is a UnityEngine.Object. So _texture == null invokes the overloaded Unity equality check, which returns true because the internal engine counterpart to the c# object doesn’t exist for whatever internal reason.

Unity’s overloaded equality operator is evil.

Ah Yes, I’ve read that before somewhere, but forgot it seems

Kind of stupid that the assertion stuff doesn’t use the overridden equality operator…