Resolve WES-187 "Unit tests common and course"

Assets/Common/Tests/PlayMode/ThemeItemTests.cs

@@ -0,0 +1,63 @@
+using NUnit.Framework;
+using UnityEngine.UI;
+using System.Collections;
+using System.IO;
+using UnityEditor;
+using UnityEngine;
+using UnityEngine.SceneManagement;
+using UnityEngine.TestTools;
+
+public class ThemeItemTests
+{
+    /// <summary>
+    /// Setup the environment before each test
+    /// </summary>
+    /// <returns></returns>
+    [UnitySetUp]
+    public IEnumerator SetupFunction()
+    {
+        string path = $"{Application.persistentDataPath}/wesign_unit_test.json";
+        string oneUser = $"{{\"version\":1027,\"users\":[{{\"entries\":[],\"username\":\"TEST\",\"avatarIndex\":0,\"playtime\":0.0,\"minigames\":[],\"courses\":[]}}],\"currentUser\":0,\"currentMinigame\":0,\"currentCourse\":0,\"currentTheme\":0}}";
+
+        File.WriteAllText(path, oneUser);
+        PersistentDataController.PATH = path;
+        PersistentDataController.GetInstance().Load();
+        AssetDatabase.LoadAssetAtPath<UserAvatarList>("Assets/Accounts/ScriptableObjects/UserAvatarList.asset").Awake();
+        SystemController.GetInstance().LoadNextScene("Common/Scenes/ListMinigamesScreen");
+        yield return new WaitForSeconds(0.2f);
+    }
+    /// <summary>
+    /// Cleanup after testing
+    /// </summary>
+    [TearDown]
+    public void TearDown_ThemeItemTests()
+    {
+        PersistentDataController.PATH = null;
+    }
+    /// <summary>
+    /// Test the callback function of a ThemeItem
+    /// </summary>
+    /// <returns></returns>
+    [UnityTest]
+    public IEnumerator CallBackTest()
+    {
+        var listMinigamesScreen = GameObject.FindObjectOfType<ListMinigamesScreen>();
+        listMinigamesScreen.minigameList.SetCurrentMinigame(MinigameIndex.SPELLING_BEE);
+        listMinigamesScreen.LoadScene("Common/Scenes/MinigameActivityScreen");
+        yield return new WaitForSeconds(0.2f);
+        SystemController.GetInstance().LoadNextScene("Common/Scenes/ThemeSelectionScreen");
+        yield return new WaitForSeconds(0.2f);
+
+        GameObject buttonObject = GameObject.Find("Theme Item(Clone)");
+        Assert.IsNotNull(buttonObject, "Could not find button object");
+
+        Button button = buttonObject.GetComponent<Button>();
+        Assert.IsNotNull(button, "Button component not found on button object");
+
+        button.onClick.Invoke();
+
+        yield return new WaitForSeconds(0.2f);
+
+        Assert.AreEqual("SpellingBeeGame", SceneManager.GetActiveScene().name); 
+    }
+}