text: // Copyright 2014 The Chromium Authors. All rights reserved.
  // Use of this source code is governed by a BSD-style license that can be
  // found in the LICENSE file.
  
  #include "net/third_party/quiche/src/spdy/core/spdy_prefixed_buffer_reader.h"
  
  #include <string>
  
  #include "net/third_party/quiche/src/common/platform/api/quiche_string_piece.h"
  #include "net/third_party/quiche/src/common/platform/api/quiche_test.h"
  
  namespace spdy {
  
  namespace test {
  
  using testing::ElementsAreArray;
  
  class SpdyPrefixedBufferReaderTest : public QuicheTest {
   protected:
    SpdyPrefixedBufferReader Build(const std::string& prefix,
                                   const std::string& suffix) {
      prefix_ = prefix;
      suffix_ = suffix;
      return SpdyPrefixedBufferReader(prefix_.data(), prefix_.length(),
                                      suffix_.data(), suffix_.length());
    }
    std::string prefix_, suffix_;
  };
  
  TEST_F(SpdyPrefixedBufferReaderTest, ReadRawFromPrefix) {
    SpdyPrefixedBufferReader reader = Build("foobar", "");
    EXPECT_EQ(6u, reader.Available());
  
    char buffer[] = "123456";
    EXPECT_FALSE(reader.ReadN(10, buffer));  // Not enough buffer.
    EXPECT_TRUE(reader.ReadN(6, buffer));
    EXPECT_THAT(buffer, ElementsAreArray("foobar"));
    EXPECT_EQ(0u, reader.Available());
  }
  
  TEST_F(SpdyPrefixedBufferReaderTest, ReadPieceFromPrefix) {
    SpdyPrefixedBufferReader reader = Build("foobar", "");
    EXPECT_EQ(6u, reader.Available());
  
    SpdyPinnableBufferPiece piece;
    EXPECT_FALSE(reader.ReadN(10, &piece));  // Not enough buffer.
    EXPECT_TRUE(reader.ReadN(6, &piece));
    EXPECT_FALSE(piece.IsPinned());
    EXPECT_EQ(quiche::QuicheStringPiece("foobar"),
              quiche::QuicheStringPiece(piece));
    EXPECT_EQ(0u, reader.Available());
  }
  
  TEST_F(SpdyPrefixedBufferReaderTest, ReadRawFromSuffix) {
    SpdyPrefixedBufferReader reader = Build("", "foobar");
    EXPECT_EQ(6u, reader.Available());
  
    char buffer[] = "123456";
    EXPECT_FALSE(reader.ReadN(10, buffer));  // Not enough buffer.
    EXPECT_TRUE(reader.ReadN(6, buffer));
    EXPECT_THAT(buffer, ElementsAreArray("foobar"));
    EXPECT_EQ(0u, reader.Available());
  }
  
  TEST_F(SpdyPrefixedBufferReaderTest, ReadPieceFromSuffix) {
    SpdyPrefixedBufferReader reader = Build("", "foobar");
    EXPECT_EQ(6u, reader.Available());
  
    SpdyPinnableBufferPiece piece;
    EXPECT_FALSE(reader.ReadN(10, &piece));  // Not enough buffer.
    EXPECT_TRUE(reader.ReadN(6, &piece));
    EXPECT_FALSE(piece.IsPinned());
    EXPECT_EQ(quiche::QuicheStringPiece("foobar"),
              quiche::QuicheStringPiece(piece));
    EXPECT_EQ(0u, reader.Available());
  }
  
  TEST_F(SpdyPrefixedBufferReaderTest, ReadRawSpanning) {
    SpdyPrefixedBufferReader reader = Build("foob", "ar");
    EXPECT_EQ(6u, reader.Available());
  
    char buffer[] = "123456";
    EXPECT_FALSE(reader.ReadN(10, buffer));  // Not enough buffer.
    EXPECT_TRUE(reader.ReadN(6, buffer));
    EXPECT_THAT(buffer, ElementsAreArray("foobar"));
    EXPECT_EQ(0u, reader.Available());
  }
  
  TEST_F(SpdyPrefixedBufferReaderTest, ReadPieceSpanning) {
    SpdyPrefixedBufferReader reader = Build("foob", "ar");
    EXPECT_EQ(6u, reader.Available());
  
    SpdyPinnableBufferPiece piece;
    EXPECT_FALSE(reader.ReadN(10, &piece));  // Not enough buffer.
    EXPECT_TRUE(reader.ReadN(6, &piece));
    EXPECT_TRUE(piece.IsPinned());
    EXPECT_EQ(quiche::QuicheStringPiece("foobar"),
              quiche::QuicheStringPiece(piece));
    EXPECT_EQ(0u, reader.Available());
  }
  
  TEST_F(SpdyPrefixedBufferReaderTest, ReadMixed) {
    SpdyPrefixedBufferReader reader = Build("abcdef", "hijkl");
    EXPECT_EQ(11u, reader.Available());
  
    char buffer[] = "1234";
    SpdyPinnableBufferPiece piece;
  
    EXPECT_TRUE(reader.ReadN(3, buffer));
    EXPECT_THAT(buffer, ElementsAreArray("abc4"));
    EXPECT_EQ(8u, reader.Available());
  
    EXPECT_TRUE(reader.ReadN(2, buffer));
    EXPECT_THAT(buffer, ElementsAreArray("dec4"));
    EXPECT_EQ(6u, reader.Available());
  
    EXPECT_TRUE(reader.ReadN(3, &piece));
    EXPECT_EQ(quiche::QuicheStringPiece("fhi"), quiche::QuicheStringPiece(piece));
    EXPECT_TRUE(piece.IsPinned());
    EXPECT_EQ(3u, reader.Available());
  
    EXPECT_TRUE(reader.ReadN(2, &piece));
    EXPECT_EQ(quiche::QuicheStringPiece("jk"), quiche::QuicheStringPiece(piece));
    EXPECT_FALSE(piece.IsPinned());
    EXPECT_EQ(1u, reader.Available());
  
    EXPECT_TRUE(reader.ReadN(1, buffer));
    EXPECT_THAT(buffer, ElementsAreArray("lec4"));
    EXPECT_EQ(0u, reader.Available());
  }
  
  }  // namespace test
  
  }  // namespace spdy
  