SF: Abstract and mock HWC2::Layer
This allows tests to be written without creating a real HWC2::Layer.
Test: atest libsurfaceflinger_unittest libcompositionengine_test
Bug: 121291683
Change-Id: I6091329973bf765d3a8ef387f45565f341acdd39
diff --git a/services/surfaceflinger/CompositionEngine/tests/MockHWC2.cpp b/services/surfaceflinger/CompositionEngine/tests/MockHWC2.cpp
new file mode 100644
index 0000000..8c10341
--- /dev/null
+++ b/services/surfaceflinger/CompositionEngine/tests/MockHWC2.cpp
@@ -0,0 +1,32 @@
+/*
+ * Copyright 2019 The Android Open Source Project
+
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "MockHWC2.h"
+
+namespace HWC2 {
+
+// This will go away once HWC2::Layer is moved into the "backend" library
+Layer::~Layer() = default;
+
+namespace mock {
+
+// The Google Mock documentation recommends explicit non-header instantiations
+// for better compile time performance.
+Layer::Layer() = default;
+Layer::~Layer() = default;
+
+} // namespace mock
+} // namespace HWC2