Add tests for gfe/quic/spdy_utils::CopyAndValidateTrailers.

net/quic/core/spdy_utils_test.cc

Index: net/quic/core/spdy_utils_test.cc
diff --git a/net/quic/core/spdy_utils_test.cc b/net/quic/core/spdy_utils_test.cc
index 034af2537280bb3221abd66d7d8d5e07a807502f..b5978aa74c44425a85ce56b979bc129b4dbdc39d 100644
--- a/net/quic/core/spdy_utils_test.cc
+++ b/net/quic/core/spdy_utils_test.cc
@@ -194,6 +194,74 @@ TEST(CopyAndValidateHeaders, MultipleCookies) {
   EXPECT_EQ(-1, content_length);
 }
 
+TEST(CopyAndValidateTrailers, SimplestValidList) {
+  // Verify that the simplest trailers are valid: just a final byte offset that
+  // gets parsed successfully.
+  auto trailers = FromList({{kFinalOffsetHeaderKey, "1234"}});
+  size_t final_byte_offset = 0;
+  SpdyHeaderBlock block;
+  EXPECT_TRUE(SpdyUtils::CopyAndValidateTrailers(*trailers, &final_byte_offset,
+                                                 &block));
+  EXPECT_EQ(1234u, final_byte_offset);
+}
+
+TEST(CopyAndValidateTrailers, EmptyTrailerList) {
+  // An empty trailer list will fail as required key kFinalOffsetHeaderKey is
+  // not present.
+  QuicHeaderList trailers;
+  size_t final_byte_offset = 0;
+  SpdyHeaderBlock block;
+  EXPECT_FALSE(
+      SpdyUtils::CopyAndValidateTrailers(trailers, &final_byte_offset, &block));
+}
+
+TEST(CopyAndValidateTrailers, FinalByteOffsetNotPresent) {
+  // Validation fails if required kFinalOffsetHeaderKey is not present, even if
+  // the rest of the header block is valid.
+  auto trailers = FromList({{"key", "value"}});
+  size_t final_byte_offset = 0;
+  SpdyHeaderBlock block;
+  EXPECT_FALSE(SpdyUtils::CopyAndValidateTrailers(*trailers, &final_byte_offset,
+                                                  &block));
+}
+
+TEST(CopyAndValidateTrailers, EmptyName) {
+  // Trailer validation will fail with an empty header key, in an otherwise
+  // valid block of trailers.
+  auto trailers = FromList({{"", "value"}, {kFinalOffsetHeaderKey, "1234"}});
+  size_t final_byte_offset = 0;
+  SpdyHeaderBlock block;
+  EXPECT_FALSE(SpdyUtils::CopyAndValidateTrailers(*trailers, &final_byte_offset,
+                                                  &block));
+}
+
+TEST(CopyAndValidateTrailers, PseudoHeaderInTrailers) {
+  // Pseudo headers are illegal in trailers.
+  auto trailers =
+      FromList({{":pseudo_key", "value"}, {kFinalOffsetHeaderKey, "1234"}});
+  size_t final_byte_offset = 0;
+  SpdyHeaderBlock block;
+  EXPECT_FALSE(SpdyUtils::CopyAndValidateTrailers(*trailers, &final_byte_offset,
+                                                  &block));
+}
+
+TEST(CopyAndValidateTrailers, DuplicateTrailers) {
+  // Duplicate trailers are not allowed.
+  auto trailers = FromList({{"key", "value0"},
+                            {"key", "value1"},
+                            {"key", ""},
+                            {"key", ""},
+                            {"key", "value2"},
+                            {"key", ""},
+                            {kFinalOffsetHeaderKey, "1234"},
+                            {"other_key", "value"},
+                            {"key", "non_contiguous_duplicate"}});
+  size_t final_byte_offset = 0;
+  SpdyHeaderBlock block;
+  EXPECT_FALSE(SpdyUtils::CopyAndValidateTrailers(*trailers, &final_byte_offset,
+                                                  &block));
+}
+
 TEST(GetUrlFromHeaderBlock, Basic) {
   SpdyHeaderBlock headers;
   EXPECT_EQ(SpdyUtils::GetUrlFromHeaderBlock(headers), "");