Add a new incremental parsing API

Change-Id: I6b921766836d58df0281fb23b2add3f62a478e14

webm_parser/tests/virtual_block_parser_test.cc

@@ -0,0 +1,74 @@
+// 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/virtual_block_parser.h"
+
+#include "gtest/gtest.h"
+
+#include "test_utils/element_parser_test.h"
+#include "webm/id.h"
+#include "webm/status.h"
+
+using webm::ElementParserTest;
+using webm::Id;
+using webm::kUnknownElementSize;
+using webm::Status;
+using webm::VirtualBlock;
+using webm::VirtualBlockParser;
+
+namespace {
+
+class VirtualBlockParserTest
+    : public ElementParserTest<VirtualBlockParser, Id::kBlockVirtual> {};
+
+TEST_F(VirtualBlockParserTest, InvalidSize) {
+  TestInit(3, Status::kInvalidElementSize);
+  TestInit(kUnknownElementSize, Status::kInvalidElementSize);
+}
+
+TEST_F(VirtualBlockParserTest, InvalidBlock) {
+  SetReaderData({
+      0x40, 0x01,  // Track number = 1.
+      0x00, 0x00,  // Timecode = 0.
+      0x00,        // Flags.
+  });
+
+  // Initialize with 1 byte short.
+  ParseAndExpectResult(Status::kInvalidElementValue, reader_.size() - 1);
+}
+
+TEST_F(VirtualBlockParserTest, ValidBlock) {
+  SetReaderData({
+      0x81,        // Track number = 1.
+      0x12, 0x34,  // Timecode = 4660.
+      0x00,        // Flags.
+  });
+
+  ParseAndVerify();
+
+  const VirtualBlock virtual_block = parser_.value();
+
+  EXPECT_EQ(1, virtual_block.track_number);
+  EXPECT_EQ(0x1234, virtual_block.timecode);
+}
+
+TEST_F(VirtualBlockParserTest, IncrementalParse) {
+  SetReaderData({
+      0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02,  // Track number = 2.
+      0xFF, 0xFE,                                      // Timecode = -2.
+      0x00,                                            // Flags.
+  });
+
+  IncrementalParseAndVerify();
+
+  const VirtualBlock virtual_block = parser_.value();
+
+  EXPECT_EQ(2, virtual_block.track_number);
+  EXPECT_EQ(-2, virtual_block.timecode);
+}
+
+}  // namespace