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// 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/spdy/hpack_encoding_context.h"
#include <vector>
#include "base/basictypes.h"
#include "net/spdy/hpack_constants.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace net {
namespace test {
class HpackEncodingContextPeer {
public:
explicit HpackEncodingContextPeer(const HpackEncodingContext& context)
: context_(context) {}
const HpackHeaderTable& header_table() {
return context_.header_table_;
}
uint32 settings_header_table_size() {
return context_.settings_header_table_size_;
}
private:
const HpackEncodingContext& context_;
};
} // namespace test
namespace {
TEST(HpackEncodingContextTest, ApplyHeaderTableSizeSetting) {
HpackEncodingContext context;
test::HpackEncodingContextPeer peer(context);
// Default setting and table size are kDefaultHeaderTableSizeSetting.
EXPECT_EQ(kDefaultHeaderTableSizeSetting,
peer.settings_header_table_size());
EXPECT_EQ(kDefaultHeaderTableSizeSetting,
peer.header_table().max_size());
// Applying a larger table size setting doesn't affect the headers table.
context.ApplyHeaderTableSizeSetting(kDefaultHeaderTableSizeSetting * 2);
EXPECT_EQ(kDefaultHeaderTableSizeSetting * 2,
peer.settings_header_table_size());
EXPECT_EQ(kDefaultHeaderTableSizeSetting,
peer.header_table().max_size());
// Applying a smaller size setting does update the headers table.
context.ApplyHeaderTableSizeSetting(kDefaultHeaderTableSizeSetting / 2);
EXPECT_EQ(kDefaultHeaderTableSizeSetting / 2,
peer.settings_header_table_size());
EXPECT_EQ(kDefaultHeaderTableSizeSetting / 2,
peer.header_table().max_size());
}
TEST(HpackEncodingContextTest, ProcessContextUpdateNewMaximumSize) {
HpackEncodingContext context;
test::HpackEncodingContextPeer peer(context);
EXPECT_EQ(kDefaultHeaderTableSizeSetting,
peer.settings_header_table_size());
// Shrink maximum size by half. Succeeds.
EXPECT_TRUE(context.ProcessContextUpdateNewMaximumSize(
kDefaultHeaderTableSizeSetting / 2));
EXPECT_EQ(kDefaultHeaderTableSizeSetting / 2,
peer.header_table().max_size());
// Double maximum size. Succeeds.
EXPECT_TRUE(context.ProcessContextUpdateNewMaximumSize(
kDefaultHeaderTableSizeSetting));
EXPECT_EQ(kDefaultHeaderTableSizeSetting, peer.header_table().max_size());
// One beyond table size setting. Fails.
EXPECT_FALSE(context.ProcessContextUpdateNewMaximumSize(
kDefaultHeaderTableSizeSetting + 1));
EXPECT_EQ(kDefaultHeaderTableSizeSetting, peer.header_table().max_size());
}
// Try to process an indexed header with an index for a static
// header. That should succeed and add a mutable copy into the header
// table.
TEST(HpackEncodingContextTest, IndexedHeaderStatic) {
HpackEncodingContext encoding_context;
std::string name = encoding_context.GetNameAt(2).as_string();
std::string value = encoding_context.GetValueAt(2).as_string();
EXPECT_EQ(0u, encoding_context.GetMutableEntryCount());
EXPECT_NE(name, encoding_context.GetNameAt(1));
EXPECT_NE(value, encoding_context.GetValueAt(1));
{
uint32 new_index = 0;
std::vector<uint32> removed_referenced_indices;
EXPECT_TRUE(
encoding_context.ProcessIndexedHeader(2,
&new_index,
&removed_referenced_indices));
EXPECT_EQ(1u, new_index);
EXPECT_TRUE(removed_referenced_indices.empty());
}
EXPECT_EQ(1u, encoding_context.GetMutableEntryCount());
EXPECT_EQ(name, encoding_context.GetNameAt(1));
EXPECT_EQ(value, encoding_context.GetValueAt(1));
EXPECT_TRUE(encoding_context.IsReferencedAt(1));
{
uint32 new_index = 0;
std::vector<uint32> removed_referenced_indices;
EXPECT_TRUE(
encoding_context.ProcessIndexedHeader(1,
&new_index,
&removed_referenced_indices));
EXPECT_EQ(1u, new_index);
EXPECT_TRUE(removed_referenced_indices.empty());
}
EXPECT_EQ(1u, encoding_context.GetMutableEntryCount());
EXPECT_EQ(name, encoding_context.GetNameAt(1));
EXPECT_EQ(value, encoding_context.GetValueAt(1));
EXPECT_LE(1u, encoding_context.GetMutableEntryCount());
EXPECT_FALSE(encoding_context.IsReferencedAt(1));
}
// Try to process an indexed header with an index for a static header
// and an encoding context where a copy of that header wouldn't
// fit. That should succeed without making a copy.
TEST(HpackEncodingContextTest, IndexedHeaderStaticCopyDoesNotFit) {
HpackEncodingContext encoding_context;
encoding_context.ProcessContextUpdateNewMaximumSize(0);
uint32 new_index = 0;
std::vector<uint32> removed_referenced_indices;
EXPECT_TRUE(
encoding_context.ProcessIndexedHeader(1,
&new_index,
&removed_referenced_indices));
EXPECT_EQ(0u, new_index);
EXPECT_TRUE(removed_referenced_indices.empty());
EXPECT_EQ(0u, encoding_context.GetMutableEntryCount());
}
// Add a bunch of new headers and then process a context update to empty the
// reference set. Expect it to be empty.
TEST(HpackEncodingContextTest, ProcessContextUpdateEmptyReferenceSet) {
HpackEncodingContext encoding_context;
test::HpackEncodingContextPeer peer(encoding_context);
uint32 kEntryCount = 50;
for (uint32 i = 1; i <= kEntryCount; ++i) {
uint32 new_index = 0;
std::vector<uint32> removed_referenced_indices;
EXPECT_TRUE(
encoding_context.ProcessIndexedHeader(i,
&new_index,
&removed_referenced_indices));
EXPECT_EQ(1u, new_index);
EXPECT_TRUE(removed_referenced_indices.empty());
EXPECT_EQ(i, encoding_context.GetMutableEntryCount());
}
for (uint32 i = 1; i <= kEntryCount; ++i) {
EXPECT_TRUE(peer.header_table().GetEntry(i).IsReferenced());
}
encoding_context.ProcessContextUpdateEmptyReferenceSet();
for (uint32 i = 1; i <= kEntryCount; ++i) {
EXPECT_FALSE(peer.header_table().GetEntry(i).IsReferenced());
}
}
// NOTE: It's too onerous to try to test invalid input to
// ProcessLiteralHeaderWithIncrementalIndexing(); that would require
// making a really large (>4GB of memory) string.
// Try to process a reasonably-sized literal header with incremental
// indexing. It should succeed.
TEST(HpackEncodingContextTest, LiteralHeaderIncrementalIndexing) {
HpackEncodingContext encoding_context;
uint32 index = 0;
std::vector<uint32> removed_referenced_indices;
EXPECT_TRUE(
encoding_context.ProcessLiteralHeaderWithIncrementalIndexing(
"name", "value", &index, &removed_referenced_indices));
EXPECT_EQ(1u, index);
EXPECT_TRUE(removed_referenced_indices.empty());
EXPECT_EQ("name", encoding_context.GetNameAt(1).as_string());
EXPECT_EQ("value", encoding_context.GetValueAt(1).as_string());
EXPECT_TRUE(encoding_context.IsReferencedAt(1));
EXPECT_EQ(1u, encoding_context.GetMutableEntryCount());
}
// Try to process a literal header with incremental indexing that is
// too large for the header table. It should succeed without indexing
// into the table.
TEST(HpackEncodingContextTest, LiteralHeaderIncrementalIndexingDoesNotFit) {
HpackEncodingContext encoding_context;
encoding_context.ProcessContextUpdateNewMaximumSize(0);
uint32 index = 0;
std::vector<uint32> removed_referenced_indices;
EXPECT_TRUE(
encoding_context.ProcessLiteralHeaderWithIncrementalIndexing(
"name", "value", &index, &removed_referenced_indices));
EXPECT_EQ(0u, index);
EXPECT_TRUE(removed_referenced_indices.empty());
EXPECT_EQ(0u, encoding_context.GetMutableEntryCount());
}
} // namespace
} // namespace net
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