1 files changed, 106 insertions, 0 deletions
diff --git a/gfx/tests/gtest/TestGfxPrefs.cpp b/gfx/tests/gtest/TestGfxPrefs.cpp
new file mode 100644
index 000000000..72b698ed6
--- /dev/null
+++ b/gfx/tests/gtest/TestGfxPrefs.cpp
@@ -0,0 +1,106 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "gtest/gtest.h"
+
+#include "gfxPrefs.h"
+#ifdef GFX_DECL_PREF
+#error "This is not supposed to be defined outside of gfxPrefs.h"
+#endif
+
+// If the default values for any of these preferences change,
+// just modify the test to match. We are only testing against
+// a particular value to make sure we receive the correct
+// result through this API.
+
+TEST(GfxPrefs, Singleton) {
+  gfxPrefs::GetSingleton();
+  ASSERT_TRUE(gfxPrefs::SingletonExists());
+}
+
+TEST(GfxPrefs, LiveValues) {
+  gfxPrefs::GetSingleton();
+  ASSERT_TRUE(gfxPrefs::SingletonExists());
+
+  // Live boolean, default false
+  ASSERT_FALSE(gfxPrefs::LayersDumpTexture());
+
+  // Live int32_t, default 23456
+  ASSERT_TRUE(gfxPrefs::LayerScopePort() == 23456);
+
+  // Live uint32_t, default 2
+  ASSERT_TRUE(gfxPrefs::MSAALevel() == 2);
+}
+
+TEST(GfxPrefs, OnceValues) {
+  gfxPrefs::GetSingleton();
+  ASSERT_TRUE(gfxPrefs::SingletonExists());
+
+  // Once boolean, default true
+  ASSERT_TRUE(gfxPrefs::WorkAroundDriverBugs());
+
+  // Once boolean, default false
+  ASSERT_FALSE(gfxPrefs::LayersDump());
+
+  // Once int32_t, default 95
+  ASSERT_TRUE(gfxPrefs::CanvasSkiaGLCacheSize() == 96);
+
+  // Once uint32_t, default 5
+  ASSERT_TRUE(gfxPrefs::APZMaxVelocityQueueSize() == 5);
+
+  // Once float, default -1 (should be OK with ==)
+  ASSERT_TRUE(gfxPrefs::APZMaxVelocity() == -1.0f);
+}
+
+TEST(GfxPrefs, Set) {
+  gfxPrefs::GetSingleton();
+  ASSERT_TRUE(gfxPrefs::SingletonExists());
+
+  // Once boolean, default false
+  ASSERT_FALSE(gfxPrefs::LayersDump());
+  gfxPrefs::SetLayersDump(true);
+  ASSERT_TRUE(gfxPrefs::LayersDump());
+  gfxPrefs::SetLayersDump(false);
+  ASSERT_FALSE(gfxPrefs::LayersDump());
+
+  // Live boolean, default false
+  ASSERT_FALSE(gfxPrefs::LayersDumpTexture());
+  gfxPrefs::SetLayersDumpTexture(true);
+  ASSERT_TRUE(gfxPrefs::LayersDumpTexture());
+  gfxPrefs::SetLayersDumpTexture(false);
+  ASSERT_FALSE(gfxPrefs::LayersDumpTexture());
+
+  // Once float, default -1
+  ASSERT_TRUE(gfxPrefs::APZMaxVelocity() == -1.0f);
+  gfxPrefs::SetAPZMaxVelocity(1.75f);
+  ASSERT_TRUE(gfxPrefs::APZMaxVelocity() == 1.75f);
+  gfxPrefs::SetAPZMaxVelocity(-1.0f);
+  ASSERT_TRUE(gfxPrefs::APZMaxVelocity() == -1.0f);
+}
+
+#ifdef MOZ_CRASHREPORTER
+// Randomly test the function we use in nsExceptionHandler.cpp here:
+extern bool SimpleNoCLibDtoA(double aValue, char* aBuffer, int aBufferLength);
+TEST(GfxPrefs, StringUtility)
+{
+  char testBuffer[64];
+  double testVal[] = {13.4,
+                      3324243.42,
+                      0.332424342,
+                      864.0,
+                      86400 * 100000000.0 * 10000000000.0 * 10000000000.0 * 100.0,
+                      86400.0 * 366.0 * 100.0 + 14243.44332};
+  for (size_t i=0; i<mozilla::ArrayLength(testVal); i++) {
+    ASSERT_TRUE(SimpleNoCLibDtoA(testVal[i], testBuffer, sizeof(testBuffer)));
+    ASSERT_TRUE(fabs(1.0 - atof(testBuffer)/testVal[i]) < 0.0001);
+  }
+
+  // We do not like negative numbers (random limitation)
+  ASSERT_FALSE(SimpleNoCLibDtoA(-864.0, testBuffer, sizeof(testBuffer)));
+
+  // It won't fit into 32:
+  ASSERT_FALSE(SimpleNoCLibDtoA(testVal[4], testBuffer, sizeof(testBuffer)/2));
+}
+#endif