Add a new incremental parsing API

Change-Id: I6b921766836d58df0281fb23b2add3f62a478e14

webm_parser/tests/block_header_parser_test.cc

@@ -0,0 +1,55 @@
+// Copyright (c) 2016 The WebM project authors. All Rights Reserved.
+//
+// Use of this source code is governed by a BSD-style license
+// that can be found in the LICENSE file in the root of the source
+// tree. An additional intellectual property rights grant can be found
+// in the file PATENTS.  All contributing project authors may
+// be found in the AUTHORS file in the root of the source tree.
+#include "src/block_header_parser.h"
+
+#include "gtest/gtest.h"
+
+#include "test_utils/parser_test.h"
+#include "webm/status.h"
+
+using webm::BlockHeader;
+using webm::BlockHeaderParser;
+using webm::ParserTest;
+
+namespace {
+
+class BlockHeaderParserTest : public ParserTest<BlockHeaderParser> {};
+
+TEST_F(BlockHeaderParserTest, ValidBlock) {
+  SetReaderData({
+      0x81,        // Track number = 1.
+      0x12, 0x34,  // Timecode = 4660.
+      0x00,        // Flags.
+  });
+
+  ParseAndVerify();
+
+  const BlockHeader& block_header = parser_.value();
+
+  EXPECT_EQ(1, block_header.track_number);
+  EXPECT_EQ(0x1234, block_header.timecode);
+  EXPECT_EQ(0x00, block_header.flags);
+}
+
+TEST_F(BlockHeaderParserTest, IncrementalParse) {
+  SetReaderData({
+      0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02,  // Track number = 2.
+      0xFF, 0xFE,                                      // Timecode = -2.
+      0xFF,                                            // Flags.
+  });
+
+  IncrementalParseAndVerify();
+
+  const BlockHeader& block_header = parser_.value();
+
+  EXPECT_EQ(2, block_header.track_number);
+  EXPECT_EQ(-2, block_header.timecode);
+  EXPECT_EQ(0xFF, block_header.flags);
+}
+
+}  // namespace