[LYN-2255] Made PrefabTestFixture have the prefab system enabled so that the duplicate tests pass on Jenkins (they rely on the PrefabEditorEntityOwnershipInterface being registered).

Code/Framework/AzToolsFramework/Tests/Prefab/PrefabTestFixture.cpp

@@ -20,6 +20,17 @@
 
 namespace UnitTest
 {
+    PrefabTestToolsApplication::PrefabTestToolsApplication(AZStd::string appName)
+        : ToolsTestApplication(AZStd::move(appName))
+    {
+    }
+
+    bool PrefabTestToolsApplication::IsPrefabSystemEnabled() const
+    {
+        // Make sure our prefab tests always run with prefabs enabled
+        return true;
+    }
+
     void PrefabTestFixture::SetUpEditorFixtureImpl()
     {
         // Acquire the system entity
@@ -44,6 +55,11 @@ namespace UnitTest
         GetApplication()->RegisterComponentDescriptor(PrefabTestComponent::CreateDescriptor());
     }
 
+    AZStd::unique_ptr<ToolsTestApplication> PrefabTestFixture::CreateTestApplication()
+    {
+        return AZStd::make_unique<PrefabTestToolsApplication>("PrefabTestApplication");
+    }
+
     AZ::Entity* PrefabTestFixture::CreateEntity(const char* entityName, const bool shouldActivate)
     {
         // Circumvent the EntityContext system and generate a new entity with a transformcomponent

Code/Framework/AzToolsFramework/Tests/Prefab/PrefabTestFixture.h

@@ -31,6 +31,16 @@ namespace UnitTest
     using namespace AzToolsFramework::Prefab;
     using namespace PrefabTestUtils;
 
+    class PrefabTestToolsApplication
+        : public ToolsTestApplication
+    {
+    public:
+        PrefabTestToolsApplication(AZStd::string appName);
+
+        // Make sure our prefab tests always run with prefabs enabled
+        bool IsPrefabSystemEnabled() const override;
+    };
+
     class PrefabTestFixture
         : public ToolsApplicationFixture,
           public UnitTest::TraceBusRedirector
@@ -45,6 +55,8 @@ namespace UnitTest
 
         void SetUpEditorFixtureImpl() override;
 
+        AZStd::unique_ptr<ToolsTestApplication> CreateTestApplication() override;
+
         AZ::Entity* CreateEntity(const char* entityName, const bool shouldActivate = true);
 
         void CompareInstances(const Instance& instanceA, const Instance& instanceB, bool shouldCompareLinkIds = true,