Add hwui test for correct refcounting of SkColorTable in Bitmap

Test: BitmapTests.colorTableRefCounting
bug:32561595
Change-Id: I505c735feffbac18d406b6b2f9dff51d81700cd8

libs/hwui/Android.mk

@@ -278,6 +278,7 @@ LOCAL_SRC_FILES += \
     tests/unit/BakedOpDispatcherTests.cpp \
     tests/unit/BakedOpRendererTests.cpp \
     tests/unit/BakedOpStateTests.cpp \
+    tests/unit/BitmapTests.cpp \
     tests/unit/CanvasContextTests.cpp \
     tests/unit/CanvasStateTests.cpp \
     tests/unit/ClipAreaTests.cpp \

libs/hwui/tests/unit/BitmapTests.cpp

@@ -0,0 +1,44 @@
+/*
+ * Copyright (C) 2016 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 <gtest/gtest.h>
+
+#include "hwui/Bitmap.h"
+
+#include <SkBitmap.h>
+#include <SkColorTable.h>
+#include <SkImageInfo.h>
+
+#include <tests/common/TestUtils.h>
+
+using namespace android;
+using namespace android::uirenderer;
+
+TEST(Bitmap, colorTableRefCounting) {
+    const SkPMColor c[] = { SkPackARGB32(0x80, 0x80, 0, 0) };
+    SkColorTable* ctable = new SkColorTable(c, SK_ARRAY_COUNT(c));
+
+    SkBitmap* bm = new SkBitmap();
+    bm->allocPixels(SkImageInfo::Make(1, 1, kIndex_8_SkColorType, kPremul_SkAlphaType),
+            nullptr, ctable);
+    sk_sp<Bitmap> bitmap = Bitmap::allocateHeapBitmap(bm, ctable);
+    EXPECT_FALSE(ctable->unique());
+    delete bm;
+    bitmap.reset();
+    EXPECT_TRUE(ctable->unique());
+    ctable->unref();
+}
+