test cases written and bugs fixed to loadmanager

Assets/Test/TestFocus.cs

@@ -0,0 +1,45 @@
+using UnityEngine;
+using System.Collections;
+using UnityEngine.Assertions.Comparers;
+using UnityLoader;
+
+public class TestFocus : MonoBehaviour, IAssetLoader
+{
+	public float loadDuration = 10;
+
+	private void Start()
+	{
+		LoadManager.CreateManager(1f/30);
+		LoadManager.instance.RegisterObject(gameObject);
+		LoadManager.instance.StartLoading(() => Debug.Log("Loading Complete!"));
+	}
+
+	private void OnApplicationFocus(bool focus)
+	{
+		Debug.Log("Focus Change: " + focus);
+	}
+
+	public IEnumerator LoadAssets()
+	{
+		float loadTime = Time.realtimeSinceStartup + loadDuration;
+
+		while (Time.realtimeSinceStartup < loadTime)
+		{
+			Debug.Log("Frame: " + Time.renderedFrameCount);
+
+			float delayTime = Time.realtimeSinceStartup + 1f / 30;
+
+			while (Time.realtimeSinceStartup < delayTime)
+			{
+
+			}
+
+			yield return null;
+		}
+	}
+
+	public void AssetsLoaded()
+	{
+
+	}
+}

Assets/Test/TestFunctionality.cs

@@ -0,0 +1,146 @@
+using UnityEngine;
+using System.Collections;
+using System.Reflection;
+using UnityEngine.Assertions;
+using UnityLoader;
+
+namespace UnityLoaderTests
+{
+	public class TestFunctionality : MonoBehaviour
+	{
+		public int targetFPS = 30;
+
+		private void Awake()
+		{
+			LoadManager.CreateManager(targetFPS);
+		}
+
+		//
+		// Test Correct Steps
+		//
+
+		private const int STEPS_USED = 10;
+
+		public class TestCorrectStepsClass : IAssetLoader
+		{
+			public IEnumerator LoadAssets()
+			{
+				for (int i = 0; i < STEPS_USED; i++)
+				{
+					LoadManager.instance.IncrementLoadStep();
+					yield return null;
+				}
+
+				yield return null;
+			}
+
+			public void AssetsLoaded()
+			{
+
+			}
+		}
+
+		public void TestCorrectSteps()
+		{
+			TestCorrectStepsClass test = new TestCorrectStepsClass();
+			LoadManager.instance.RegisterObject(test, STEPS_USED);
+			LoadManager.instance.StartLoading(() => Assert.IsTrue(LoadManager.instance.progress == 1f));
+		}
+
+		//
+		// Test Too Few Steps
+		//
+
+		public class TestTooFewStepsClass : IAssetLoader
+		{
+			public IEnumerator LoadAssets()
+			{
+				for (int i = 0; i < STEPS_USED; i++)
+				{
+					if (i % 2 == 0)
+					{
+						LoadManager.instance.IncrementLoadStep();
+					}
+
+					yield return null;
+				}
+
+				yield return null;
+			}
+
+			public void AssetsLoaded()
+			{
+
+			}
+		}
+
+		public void TestTooFewSteps()
+		{
+			TestTooFewStepsClass test = new TestTooFewStepsClass();
+			LoadManager.instance.RegisterObject(test, STEPS_USED);
+			LoadManager.instance.StartLoading(() => Assert.IsTrue(LoadManager.instance.progress == 1f));
+		}
+
+		//
+		// Test Too Few Steps
+		//
+
+		public class TestTooManyStepsClass : IAssetLoader
+		{
+			public IEnumerator LoadAssets()
+			{
+				for (int i = 0; i < STEPS_USED; i++)
+				{
+					LoadManager.instance.IncrementLoadStep();
+					yield return null;
+				}
+
+				LoadManager.instance.IncrementLoadStep();
+				yield return null;
+			}
+
+			public void AssetsLoaded()
+			{
+
+			}
+		}
+
+		public void TestTooManySteps()
+		{
+			TestTooManyStepsClass test = new TestTooManyStepsClass();
+			LoadManager.instance.RegisterObject(test, STEPS_USED);
+			LoadManager.instance.StartLoading(() => Assert.IsTrue(LoadManager.instance.progress == 1f));
+		}
+
+		//
+		// Test Force Yield
+		//
+
+		public class TestForceYieldClass : IAssetLoader
+		{
+			public IEnumerator LoadAssets()
+			{
+				float time = Time.realtimeSinceStartup + 10;
+
+				while (Time.realtimeSinceStartup < time)
+				{
+					Debug.Log("Frame: " + Time.renderedFrameCount);
+					yield return new ForceYield();
+				}
+			}
+
+			public void AssetsLoaded()
+			{
+
+			}
+		}
+
+		public void TestForceYield()
+		{
+			TestForceYieldClass test = new TestForceYieldClass();
+			LoadManager.instance.secondsAllowedPerFrame = 100;
+			LoadManager.instance.RegisterObject(test);
+			LoadManager.instance.StartLoading(() => Assert.IsTrue(LoadManager.instance.progress == 1f));
+		}
+	}
+}

Assets/UnityLoader/Scripts/LoadManager.cs

@@ -12,15 +12,15 @@ public class LoadManager : MonoBehaviour
 	{
 		#region public
 		/// <summary>
-		/// The amount of time the loader will excute before yield to a new frame.
+		/// The amount of time the loader will execute before yield to a new frame.
 		/// </summary>
 		public float secondsAllowedPerFrame = 1f / 30;
 
 		/// <summary>
 		/// Amount of memory System.GC.GetTotalMemory() can get to before yield to a new frame.
 		/// </summary>
 		[Header("WebGL")]
-		public int memoryThresholdForYield = 128000000;
+		public int memoryThresholdForYield = DEFAULT_WEBGL_MEMORY_THRESHOLD;
 
 		/// <summary>
 		/// Verbose print out the timing of each loaded object.
@@ -50,15 +50,43 @@ public static LoadManager instance
 					if (_instance == null)
 					{
 						LogErrorFormat(
-							"No instance of {0} can be found! Add the {0} component to a GameObject.",
-							typeof(LoadManager));
+							"No instance of {0} can be found! Add the {0} component to a GameObject or invoke {0}.{1}().",
+							typeof(LoadManager),
+							((System.Action<float, int, bool>)CreateManager).Method.Name);
 					}
 				}
 
 				return _instance;
 			}
 		}
 
+		/// <summary>
+		/// Creates an instance of a LoadManager. This can be done instead of having one precreated in the scene.
+		/// </summary>
+		/// <param name="secondsAllowedPerFrame">The amount of time the loader will execute before yield to a new frame.</param>
+		/// <param name="webglMemoryThresholdForYield">Amount of memory System.GC.GetTotalMemory() can get to before yield to a new frame.</param>
+		/// <param name="verboseLogging">Verbose print out the timing of each loaded object.</param>
+		public static void CreateManager(
+			float secondsAllowedPerFrame,
+			int webglMemoryThresholdForYield = DEFAULT_WEBGL_MEMORY_THRESHOLD,
+			bool verboseLogging = false)
+		{
+			if (_instance != null)
+			{
+				LogWarningFormat(
+					"{0} already exists, called to {1} will be ignored!",
+					typeof(LoadManager),
+					System.Reflection.MethodBase.GetCurrentMethod().Name);
+
+				return;
+			}
+
+			LoadManager newLoad = (new GameObject(CREATED_NAME)).AddComponent<LoadManager>();
+			newLoad.secondsAllowedPerFrame = secondsAllowedPerFrame;
+			newLoad.memoryThresholdForYield = webglMemoryThresholdForYield;
+			newLoad.verboseLogging = verboseLogging;
+		}
+
 		/// <summary>
 		/// Register an object to be loaded later.
 		/// </summary>
@@ -220,7 +248,7 @@ public void IncrementLoadStep()
 		private int _currentStep;
 
 		private bool _loadingPaused;
-		private bool _hasFocus;
+		private bool _hasFocus = true;
 		private bool _isLoading;
 		private bool _originalRunInBackground;
 
@@ -229,8 +257,11 @@ public void IncrementLoadStep()
 		private static LoadManager _instance;
 		private static bool _webglInitialized;
 
+		private const int DEFAULT_WEBGL_MEMORY_THRESHOLD = 128000000;
+		private const float NO_FOCUS_SECONDS_PER_FRAME = 1;
 		private const int ADDITIONAL_STEPS = 2;
 		private const string LOG_HEADER = "[Unity Loader]";
+		private const string CREATED_NAME = "[Unity Loader]";
 		private const string METHOD_INVOKE_DURING_LOADING_WARNING = "{0}.{1} invoked in the middle of a load! This isn't allowed. Invoke after the load finishes.";
 		private const string METHOD_INVOKE_NOT_LOADING_WARNING = "{0}.{1} invoked when not loading! This will be ignored.";
 
@@ -432,6 +463,11 @@ private bool ShouldYield(float frameStartTime)
 			{
 				if (!Application.isEditor && !_hasFocus)
 				{
+					if (Time.realtimeSinceStartup - frameStartTime >= NO_FOCUS_SECONDS_PER_FRAME)
+					{
+						return true;
+					}
+
 					// We don't have focus, go nuts.
 					return false;
 				}