Add some component tests to reference unity project (#86)

* Add some component tests to reference unity project

* Use action/setup-node@v2 to avoid problems with build

unity-project-with-correct-tests/Assets/Scripts/SampleComponent.cs

@@ -0,0 +1,17 @@
+using UnityEngine;
+
+public class SampleComponent : MonoBehaviour
+{
+  public BasicCounter Counter;
+
+  void Start()
+  {
+    Counter = new BasicCounter(5);
+  }
+
+  // Update is called once per frame
+  void Update()
+  {
+    Counter.Increment();
+  }
+}

unity-project-with-correct-tests/Assets/Scripts/SampleComponent.cs.meta

@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: 7a5f63b9ea4b465194653c4d681faf42
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

unity-project-with-correct-tests/Assets/Scripts/TimerComponent.cs

@@ -0,0 +1,18 @@
+using UnityEngine;
+
+public class TimerComponent : MonoBehaviour
+{
+  public BasicCounter Counter = new BasicCounter();
+  public float Timer = 1f;
+
+  void Update()
+  {
+    Timer -= Time.deltaTime;
+
+    if (Timer > 0)
+      return;
+
+    Counter.Increment();
+    Timer = 1f;
+  }
+}

unity-project-with-correct-tests/Assets/Scripts/TimerComponent.cs.meta

@@ -0,0 +1,3 @@
+fileFormatVersion: 2
+guid: b668d68a45bb48108ccda73269e3da7b
+timeCreated: 1610056748