Bug 767231 - Part 2: Add a sample TiledLayerBuffer test. r=ted,bjacob

gfx/layers/Makefile.in

@@ -83,6 +83,10 @@ CPPSRCS = \
         TexturePoolOGL.cpp \
         $(NULL)
 
+GTEST_CPPSRCS = \
+        TestTiledLayerBuffer.cpp \
+        $(NULL)
+
 ifeq ($(MOZ_WIDGET_TOOLKIT),windows)
 ifdef MOZ_ENABLE_D3D9_LAYER
 EXPORTS += \

gfx/layers/TestTiledLayerBuffer.cpp

@@ -0,0 +1,78 @@
+/* vim:set ts=2 sw=2 sts=2 et: */
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/
+ */
+
+#include "TiledLayerBuffer.h"
+
+#include "gtest/gtest.h"
+
+namespace mozilla {
+namespace layers {
+
+struct TestTiledLayerTile {
+  int value;
+  TestTiledLayerTile() {
+    value = 0;
+  }
+  bool operator== (const TestTiledLayerTile& o) const {
+    return value == o.value;
+  }
+  bool operator!= (const TestTiledLayerTile& o) const {
+    return value != o.value;
+  }
+};
+
+class TestTiledLayerBuffer : public TiledLayerBuffer<TestTiledLayerBuffer, TestTiledLayerTile>
+{
+  friend class TiledLayerBuffer<TestTiledLayerBuffer, TestTiledLayerTile>;
+
+public:
+  TestTiledLayerTile GetPlaceholderTile() const {
+    return TestTiledLayerTile();
+  }
+
+  TestTiledLayerTile ValidateTile(TestTiledLayerTile aTile, const nsIntPoint& aTileOrigin, const nsIntRegion& aDirtyRect) {
+    return TestTiledLayerTile();
+  }
+
+  void ReleaseTile(TestTiledLayerTile aTile)
+  {
+
+  }
+
+  void SwapTiles(TestTiledLayerTile& aTileA, TestTiledLayerTile& aTileB)
+  {
+    TestTiledLayerTile oldTileA = aTileA;
+    aTileA = aTileB;
+    aTileB = oldTileA;
+  }
+
+  void TestUpdate(const nsIntRegion& aNewValidRegion, const nsIntRegion& aPaintRegion)
+  {
+    Update(aNewValidRegion, aPaintRegion);
+  }
+};
+
+TEST(TiledLayerBuffer, TileConstructor) {
+  TestTiledLayerBuffer buffer;
+}
+
+TEST(TiledLayerBuffer, TileStart) {
+  TestTiledLayerBuffer buffer;
+
+  ASSERT_EQ(buffer.RoundDownToTileEdge(10), 0);
+  ASSERT_EQ(buffer.RoundDownToTileEdge(-10), -256);
+}
+
+TEST(TiledLayerBuffer, EmptyUpdate) {
+  TestTiledLayerBuffer buffer;
+
+  nsIntRegion validRegion(nsIntRect(0, 0, 10, 10));
+  buffer.TestUpdate(validRegion, validRegion);
+
+  ASSERT_EQ(buffer.GetValidRegion(), validRegion);
+}
+
+}
+}