Checking if frame is complete and access duration doesn't need a decode

Source/WebKit/chromium/tests/GIFImageDecoderTest.cpp

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 223 matching lines @@
     bool match = true;
     for (size_t i = 0; i < truncatedHashes.size(); ++i) {
         if (truncatedHashes[i] != progressiveHashes[i]) {
             match = false;
             break;
         }
     }
     EXPECT_TRUE(match);
 }
 
+TEST(GIFImageDecoderTest, allDataReceivedTruncation)
+{
+    OwnPtr<GIFImageDecoder> decoder(createDecoder());
+
+    RefPtr<SharedBuffer> data = readFile("/LayoutTests/fast/images/resources/animated.gif");
+    ASSERT_TRUE(data.get());
+
+    ASSERT_GE(data->size(), 10u);
+    RefPtr<SharedBuffer> tempData = SharedBuffer::create(data->data(), data->size() - 10);
+    decoder->setData(tempData.get(), true);
+
+    EXPECT_EQ(2u, decoder->frameCount());
+    EXPECT_FALSE(decoder->failed());
+
+    decoder->frameBufferAtIndex(0);
+    EXPECT_FALSE(decoder->failed());
+    decoder->frameBufferAtIndex(1);
+    EXPECT_TRUE(decoder->failed());
+}
+
+TEST(GIFImageDecoderTest, frameIsComplete)
+{
+    OwnPtr<GIFImageDecoder> decoder(createDecoder());
+
+    RefPtr<SharedBuffer> data = readFile("/LayoutTests/fast/images/resources/animated.gif");
+    ASSERT_TRUE(data.get());
+    decoder->setData(data.get(), true);
+
+    EXPECT_EQ(2u, decoder->frameCount());
+    EXPECT_FALSE(decoder->failed());
+    EXPECT_TRUE(decoder->frameIsCompleteAtIndex(0));
+    EXPECT_TRUE(decoder->frameIsCompleteAtIndex(1));
+}
+
+TEST(GIFImageDecoderTest, frameIsCompleteLoading)
+{
+    OwnPtr<GIFImageDecoder> decoder(createDecoder());
+
+    RefPtr<SharedBuffer> data = readFile("/LayoutTests/fast/images/resources/animated.gif");
+    ASSERT_TRUE(data.get());
+
+    ASSERT_GE(data->size(), 10u);
+    RefPtr<SharedBuffer> tempData = SharedBuffer::create(data->data(), data->size() - 10);
+    decoder->setData(tempData.get(), false);
+
+    EXPECT_EQ(2u, decoder->frameCount());
+    EXPECT_FALSE(decoder->failed());
+    EXPECT_TRUE(decoder->frameIsCompleteAtIndex(0));
+    EXPECT_FALSE(decoder->frameIsCompleteAtIndex(1));
+
+    decoder->setData(data.get(), true);
+    EXPECT_EQ(2u, decoder->frameCount());
+    EXPECT_TRUE(decoder->frameIsCompleteAtIndex(0));
+    EXPECT_TRUE(decoder->frameIsCompleteAtIndex(1));
+}
+
 #endif
 
 } // namespace