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// Copyright 2013 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "net/websockets/websocket_deflater.h"
#include <string>
#include "base/containers/span.h"
#include "net/base/io_buffer.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace net {
namespace {
std::string ToString(IOBufferWithSize* buffer) {
return std::string(buffer->data(), buffer->size());
}
TEST(WebSocketDeflaterTest, Construct) {
WebSocketDeflater deflater(WebSocketDeflater::TAKE_OVER_CONTEXT);
deflater.Initialize(8);
ASSERT_EQ(0u, deflater.CurrentOutputSize());
ASSERT_TRUE(deflater.Finish());
scoped_refptr<IOBufferWithSize> actual =
deflater.GetOutput(deflater.CurrentOutputSize());
EXPECT_EQ(std::string("\00", 1), ToString(actual.get()));
ASSERT_EQ(0u, deflater.CurrentOutputSize());
}
TEST(WebSocketDeflaterTest, DeflateHelloTakeOverContext) {
WebSocketDeflater deflater(WebSocketDeflater::TAKE_OVER_CONTEXT);
deflater.Initialize(15);
scoped_refptr<IOBufferWithSize> actual1, actual2;
ASSERT_TRUE(deflater.AddBytes(base::byte_span_from_cstring("Hello")));
ASSERT_TRUE(deflater.Finish());
actual1 = deflater.GetOutput(deflater.CurrentOutputSize());
EXPECT_EQ(std::string("\xf2\x48\xcd\xc9\xc9\x07\x00", 7),
ToString(actual1.get()));
ASSERT_TRUE(deflater.AddBytes(base::byte_span_from_cstring("Hello")));
ASSERT_TRUE(deflater.Finish());
actual2 = deflater.GetOutput(deflater.CurrentOutputSize());
EXPECT_EQ(std::string("\xf2\x00\x11\x00\x00", 5), ToString(actual2.get()));
}
TEST(WebSocketDeflaterTest, DeflateHelloDoNotTakeOverContext) {
WebSocketDeflater deflater(WebSocketDeflater::DO_NOT_TAKE_OVER_CONTEXT);
deflater.Initialize(15);
scoped_refptr<IOBufferWithSize> actual1, actual2;
ASSERT_TRUE(deflater.AddBytes(base::byte_span_from_cstring("Hello")));
ASSERT_TRUE(deflater.Finish());
actual1 = deflater.GetOutput(deflater.CurrentOutputSize());
EXPECT_EQ(std::string("\xf2\x48\xcd\xc9\xc9\x07\x00", 7),
ToString(actual1.get()));
ASSERT_TRUE(deflater.AddBytes(base::byte_span_from_cstring("Hello")));
ASSERT_TRUE(deflater.Finish());
actual2 = deflater.GetOutput(deflater.CurrentOutputSize());
EXPECT_EQ(std::string("\xf2\x48\xcd\xc9\xc9\x07\x00", 7),
ToString(actual2.get()));
}
TEST(WebSocketDeflaterTest, MultipleAddBytesCalls) {
WebSocketDeflater deflater(WebSocketDeflater::DO_NOT_TAKE_OVER_CONTEXT);
deflater.Initialize(15);
std::string input(32, 'a');
scoped_refptr<IOBufferWithSize> actual;
for (char& c : input) {
ASSERT_TRUE(deflater.AddBytes(base::byte_span_from_ref(c)));
}
ASSERT_TRUE(deflater.Finish());
actual = deflater.GetOutput(deflater.CurrentOutputSize());
EXPECT_EQ(std::string("\x4a\x4c\xc4\x0f\x00\x00", 6), ToString(actual.get()));
}
TEST(WebSocketDeflaterTest, GetMultipleDeflatedOutput) {
WebSocketDeflater deflater(WebSocketDeflater::TAKE_OVER_CONTEXT);
deflater.Initialize(15);
scoped_refptr<IOBufferWithSize> actual;
ASSERT_TRUE(deflater.AddBytes(base::byte_span_from_cstring("Hello")));
ASSERT_TRUE(deflater.Finish());
deflater.PushSyncMark();
ASSERT_TRUE(deflater.Finish());
deflater.PushSyncMark();
ASSERT_TRUE(deflater.AddBytes(base::byte_span_from_cstring("Hello")));
ASSERT_TRUE(deflater.Finish());
actual = deflater.GetOutput(deflater.CurrentOutputSize());
EXPECT_EQ(std::string("\xf2\x48\xcd\xc9\xc9\x07\x00\x00\x00\xff\xff"
"\x00\x00\x00\xff\xff"
"\xf2\x00\x11\x00\x00", 21),
ToString(actual.get()));
ASSERT_EQ(0u, deflater.CurrentOutputSize());
}
TEST(WebSocketDeflaterTest, WindowBits8) {
WebSocketDeflater deflater(WebSocketDeflater::DO_NOT_TAKE_OVER_CONTEXT);
deflater.Initialize(8);
// Set the head and tail of |input| so that back-reference
// can be used if the window size is sufficiently-large.
const std::string word = "Chromium";
std::string input = word + std::string(256, 'a') + word;
scoped_refptr<IOBufferWithSize> actual;
ASSERT_TRUE(deflater.AddBytes(base::as_byte_span(input)));
ASSERT_TRUE(deflater.Finish());
actual = deflater.GetOutput(deflater.CurrentOutputSize());
EXPECT_EQ(std::string("r\xce(\xca\xcf\xcd,\xcdM\x1c\xe1\xc0\x39\xa3"
"(?7\xb3\x34\x17\x00", 21),
ToString(actual.get()));
}
TEST(WebSocketDeflaterTest, WindowBits10) {
WebSocketDeflater deflater(WebSocketDeflater::DO_NOT_TAKE_OVER_CONTEXT);
deflater.Initialize(10);
// Set the head and tail of |input| so that back-reference
// can be used if the window size is sufficiently-large.
const std::string word = "Chromium";
std::string input = word + std::string(256, 'a') + word;
scoped_refptr<IOBufferWithSize> actual;
ASSERT_TRUE(deflater.AddBytes(base::as_byte_span(input)));
ASSERT_TRUE(deflater.Finish());
actual = deflater.GetOutput(deflater.CurrentOutputSize());
EXPECT_EQ(
std::string("r\xce(\xca\xcf\xcd,\xcdM\x1c\xe1\xc0\x19\x1a\x0e\0\0", 17),
ToString(actual.get()));
}
} // namespace
} // namespace net
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