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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 "mojo/shell/data_pipe_peek.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace mojo {
namespace runner {
namespace {
TEST(DataPipePeek, PeekNBytes) {
DataPipe data_pipe;
DataPipeConsumerHandle consumer(data_pipe.consumer_handle.get());
DataPipeProducerHandle producer(data_pipe.producer_handle.get());
// Inialize the pipe with 4 bytes.
const char* s4 = "1234";
uint32_t num_bytes4 = 4;
EXPECT_EQ(MOJO_RESULT_OK,
WriteDataRaw(producer, s4, &num_bytes4, MOJO_WRITE_DATA_FLAG_NONE));
EXPECT_EQ(4u, num_bytes4);
// We're not consuming data, so peeking for 4 bytes should always succeed.
std::string bytes;
MojoDeadline timeout = 0;
EXPECT_TRUE(shell::BlockingPeekNBytes(consumer, &bytes, num_bytes4, timeout));
EXPECT_EQ(bytes, std::string(s4));
timeout = 1000; // 1ms
EXPECT_TRUE(shell::BlockingPeekNBytes(consumer, &bytes, num_bytes4, timeout));
EXPECT_EQ(bytes, std::string(s4));
timeout = MOJO_DEADLINE_INDEFINITE;
EXPECT_TRUE(shell::BlockingPeekNBytes(consumer, &bytes, num_bytes4, timeout));
EXPECT_EQ(bytes, std::string(s4));
// Peeking for 5 bytes should fail, until another byte is written.
uint32_t bytes1 = 1;
uint32_t num_bytes5 = 5;
const char* s1 = "5";
const char* s5 = "12345";
timeout = 0;
EXPECT_FALSE(
shell::BlockingPeekNBytes(consumer, &bytes, num_bytes5, timeout));
timeout = 500; // Should cause peek to timeout after about 0.5ms.
EXPECT_FALSE(
shell::BlockingPeekNBytes(consumer, &bytes, num_bytes5, timeout));
EXPECT_EQ(MOJO_RESULT_OK,
WriteDataRaw(producer, s1, &bytes1, MOJO_WRITE_DATA_FLAG_NONE));
EXPECT_EQ(1u, bytes1);
EXPECT_TRUE(shell::BlockingPeekNBytes(consumer, &bytes, num_bytes5, timeout));
EXPECT_EQ(bytes, std::string(s5));
// If the consumer side of the pipe is closed, peek should fail.
data_pipe.consumer_handle.reset();
timeout = 0;
EXPECT_FALSE(
shell::BlockingPeekNBytes(consumer, &bytes, num_bytes5, timeout));
}
TEST(DataPipePeek, PeekLine) {
DataPipe data_pipe;
DataPipeConsumerHandle consumer(data_pipe.consumer_handle.get());
DataPipeProducerHandle producer(data_pipe.producer_handle.get());
// Inialize the pipe with 4 bytes and no newline.
const char* s4 = "1234";
uint32_t num_bytes4 = 4;
EXPECT_EQ(MOJO_RESULT_OK,
WriteDataRaw(producer, s4, &num_bytes4, MOJO_WRITE_DATA_FLAG_NONE));
EXPECT_EQ(4u, num_bytes4);
// Peeking for a line should fail.
std::string str;
size_t max_str_length = 5;
MojoDeadline timeout = 0;
EXPECT_FALSE(
shell::BlockingPeekLine(consumer, &str, max_str_length, timeout));
// Writing a newline should cause PeekLine to succeed.
uint32_t bytes1 = 1;
const char* s1 = "\n";
EXPECT_EQ(MOJO_RESULT_OK,
WriteDataRaw(producer, s1, &bytes1, MOJO_WRITE_DATA_FLAG_NONE));
EXPECT_EQ(1u, bytes1);
EXPECT_TRUE(shell::BlockingPeekLine(consumer, &str, max_str_length, timeout));
EXPECT_EQ(str, std::string(s4) + "\n");
// If the max_line_length parameter is less than the length of the
// newline terminated string, then peek should fail.
max_str_length = 3;
EXPECT_FALSE(
shell::BlockingPeekLine(consumer, &str, max_str_length, timeout));
}
} // namespace
} // namespace runner
} // namespace mojo
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