Unit(y) Tests

Basic Usage

1. Define classes that inherit from UnitTest
2. Within these classes, define functions with Test in their names
3. Within these functions, call Assert, AssertEqual, etc.
4. Attach the TestRunner script to an object in your scene

When the object with the TestRunner behavior initializes, it will look for all subclasses of UnitTest, create an object with that behavior attached, and call all methods containing the string Test. It will count the assertions you make and print out friendly messages with stack traces if there are failures or errors.

E.G.

class FooTest extends UnitTest {

  function TestThatWillPass() {
    Assert(true);
  }

  function TestThatWillFail() {
    Assert(false);
  }
  
  function TestThatWillError() {
    throw 'a chicken';
  }
  
  function TestWithACustomFailureMessage() {
    AssertUnequal(4, 5, "There are four lights!");
  }

  function TestArrayContentsButFail() {
    AssertContains(0, [1,2,3,4,5]);
  }

  function TestThatCreatesObjects() {
    testObject = new GameObject();
    testObject.transform.position = Vector3(5, 5, 5);
    Assert(testObject.transform.position.z == 5);
    Destroy(testObject);
  }

  function MethodThatIsNotCalled() {
    // this method doesn't have 'Test' in its name, so who cares what happens here?
  }
}

or, in C#,

using UnityEngine;

public class FooTest : UnitTest {

  public void TestA() {
    Assert(true, "this test succeeds");
  }

  public void TestB() {
    Assert(false, "this test fails");
  }
}

And it should produce the following output in your Unity console:

Note that you'll need to place UnitTest.js and TestRunner.js in your Plugins folder or some other folder that gets compiled first, if you want to use this library with C# tests.

N.B.

This isn't meant to be a comprehensive test framework, just a simple tool to make testing Unity code a little easier. It's probably best to avoid making assertions about objects that are actually part of the scene, and if you create any objects or add any components inside these tests, you should remove them manually afterwards.