test: add test for icon of components (#389)

Assets/_ModularAvatar/EditModeTests/ComponentSettingsTest.cs

@@ -0,0 +1,67 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using nadena.dev.modular_avatar.core;
+using NUnit.Framework;
+using UnityEditor;
+using UnityEngine;
+using Activator = nadena.dev.modular_avatar.core.Activator;
+using Object = UnityEngine.Object;
+
+namespace modular_avatar_tests
+{
+    public class ComponentSettingsTest : TestBase
+    {
+        GameObject _gameObject;
+        Texture2D _iconTexture;
+
+        [SetUp]
+        public virtual void Setup()
+        {
+            base.Setup();
+            _gameObject = new GameObject();
+            _iconTexture = AssetDatabase.LoadAssetAtPath<Texture2D>(
+                AssetDatabase.GUIDToAssetPath("a8edd5bd1a0a64a40aa99cc09fb5f198"));
+        }
+
+        public override void Teardown()
+        {
+            base.Teardown();
+            Object.DestroyImmediate(_gameObject);
+        }
+
+        [Test]
+        [TestCaseSource(nameof(ComponentTypes))]
+        public void CheckDisallowMultipleComponentIsSpecified(Type type)
+        {
+            // excluded types
+            if (type == typeof(Activator)) return;
+            if (type == typeof(AvatarActivator)) return;
+            if (type == typeof(TestComponent)) return;
+
+            // get icon
+            var component = (MonoBehaviour)_gameObject.AddComponent(type);
+            var monoScript = MonoScript.FromMonoBehaviour(component);
+            var scriptPath = AssetDatabase.GetAssetPath(monoScript);
+            var monoImporter = (MonoImporter)AssetImporter.GetAtPath(scriptPath);
+            // in Unity 2021.2, we can use monoImporter.GetIcon()
+            // but it's not available in unity 2019 so use SerializedObject
+            var serializedImporter = new SerializedObject(monoImporter);
+            var iconProperty = serializedImporter.FindProperty("icon");
+            var icon = iconProperty.objectReferenceValue;
+
+            // check the icon
+            Assert.That(icon, Is.EqualTo(_iconTexture));
+        }
+
+        /// <returns>All non-abstract MonoBehaviour classes</returns>
+        static IEnumerable<Type> ComponentTypes()
+        {
+            return
+                typeof(AvatarTagComponent).Assembly
+                    .GetTypes()
+                    .Where(x => x.IsClass && !x.IsAbstract)
+                    .Where(x => typeof(MonoBehaviour).IsAssignableFrom(x));
+        }
+    }
+}

Assets/_ModularAvatar/EditModeTests/ComponentSettingsTest.cs.meta

@@ -0,0 +1,3 @@
+fileFormatVersion: 2
+guid: f6c6070093d243a69c5798baf57a76e6
+timeCreated: 1691910617