1// Copyright 2014 The Chromium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#include "storage/browser/fileapi/local_file_stream_writer.h"
6
7#include <string>
8
9#include "base/callback.h"
10#include "base/files/file_util.h"
11#include "base/files/scoped_temp_dir.h"
12#include "base/logging.h"
13#include "base/memory/scoped_ptr.h"
14#include "base/message_loop/message_loop.h"
15#include "base/run_loop.h"
16#include "base/threading/thread.h"
17#include "net/base/io_buffer.h"
18#include "net/base/test_completion_callback.h"
19#include "testing/gtest/include/gtest/gtest.h"
20
21using storage::FileStreamWriter;
22using storage::LocalFileStreamWriter;
23
24namespace content {
25
26class LocalFileStreamWriterTest : public testing::Test {
27 public:
28  LocalFileStreamWriterTest()
29      : file_thread_("FileUtilProxyTestFileThread") {}
30
31  virtual void SetUp() OVERRIDE {
32    ASSERT_TRUE(file_thread_.Start());
33    ASSERT_TRUE(temp_dir_.CreateUniqueTempDir());
34  }
35
36  virtual void TearDown() OVERRIDE {
37    // Give another chance for deleted streams to perform Close.
38    base::RunLoop().RunUntilIdle();
39    file_thread_.Stop();
40    base::RunLoop().RunUntilIdle();
41  }
42
43 protected:
44  base::FilePath Path(const std::string& name) {
45    return temp_dir_.path().AppendASCII(name);
46  }
47
48  int WriteStringToWriter(LocalFileStreamWriter* writer,
49                          const std::string& data) {
50    scoped_refptr<net::StringIOBuffer> buffer(new net::StringIOBuffer(data));
51    scoped_refptr<net::DrainableIOBuffer> drainable(
52        new net::DrainableIOBuffer(buffer.get(), buffer->size()));
53
54    while (drainable->BytesRemaining() > 0) {
55      net::TestCompletionCallback callback;
56      int result = writer->Write(
57          drainable.get(), drainable->BytesRemaining(), callback.callback());
58      if (result == net::ERR_IO_PENDING)
59        result = callback.WaitForResult();
60      if (result <= 0)
61        return result;
62      drainable->DidConsume(result);
63    }
64    return net::OK;
65  }
66
67  std::string GetFileContent(const base::FilePath& path) {
68    std::string content;
69    base::ReadFileToString(path, &content);
70    return content;
71  }
72
73  base::FilePath CreateFileWithContent(const std::string& name,
74                                 const std::string& data) {
75    base::FilePath path = Path(name);
76    base::WriteFile(path, data.c_str(), data.size());
77    return path;
78  }
79
80  base::MessageLoopProxy* file_task_runner() const {
81    return file_thread_.message_loop_proxy().get();
82  }
83
84  LocalFileStreamWriter* CreateWriter(const base::FilePath& path,
85                                      int64 offset) {
86    return new LocalFileStreamWriter(file_task_runner(), path, offset,
87        FileStreamWriter::OPEN_EXISTING_FILE);
88  }
89
90 private:
91  base::MessageLoopForIO message_loop_;
92  base::Thread file_thread_;
93  base::ScopedTempDir temp_dir_;
94};
95
96void NeverCalled(int unused) {
97  ADD_FAILURE();
98}
99
100TEST_F(LocalFileStreamWriterTest, Write) {
101  base::FilePath path = CreateFileWithContent("file_a", std::string());
102  scoped_ptr<LocalFileStreamWriter> writer(CreateWriter(path, 0));
103  EXPECT_EQ(net::OK, WriteStringToWriter(writer.get(), "foo"));
104  EXPECT_EQ(net::OK, WriteStringToWriter(writer.get(), "bar"));
105  writer.reset();
106  base::RunLoop().RunUntilIdle();
107  EXPECT_TRUE(base::PathExists(path));
108  EXPECT_EQ("foobar", GetFileContent(path));
109}
110
111TEST_F(LocalFileStreamWriterTest, WriteMiddle) {
112  base::FilePath path = CreateFileWithContent("file_a", "foobar");
113  scoped_ptr<LocalFileStreamWriter> writer(CreateWriter(path, 2));
114  EXPECT_EQ(net::OK, WriteStringToWriter(writer.get(), "xxx"));
115  writer.reset();
116  base::RunLoop().RunUntilIdle();
117  EXPECT_TRUE(base::PathExists(path));
118  EXPECT_EQ("foxxxr", GetFileContent(path));
119}
120
121TEST_F(LocalFileStreamWriterTest, WriteEnd) {
122  base::FilePath path = CreateFileWithContent("file_a", "foobar");
123  scoped_ptr<LocalFileStreamWriter> writer(CreateWriter(path, 6));
124  EXPECT_EQ(net::OK, WriteStringToWriter(writer.get(), "xxx"));
125  writer.reset();
126  base::RunLoop().RunUntilIdle();
127  EXPECT_TRUE(base::PathExists(path));
128  EXPECT_EQ("foobarxxx", GetFileContent(path));
129}
130
131TEST_F(LocalFileStreamWriterTest, WriteFailForNonexistingFile) {
132  base::FilePath path = Path("file_a");
133  ASSERT_FALSE(base::PathExists(path));
134  scoped_ptr<LocalFileStreamWriter> writer(CreateWriter(path, 0));
135  EXPECT_EQ(net::ERR_FILE_NOT_FOUND, WriteStringToWriter(writer.get(), "foo"));
136  writer.reset();
137  base::RunLoop().RunUntilIdle();
138  EXPECT_FALSE(base::PathExists(path));
139}
140
141TEST_F(LocalFileStreamWriterTest, CancelBeforeOperation) {
142  base::FilePath path = Path("file_a");
143  scoped_ptr<LocalFileStreamWriter> writer(CreateWriter(path, 0));
144  // Cancel immediately fails when there's no in-flight operation.
145  int cancel_result = writer->Cancel(base::Bind(&NeverCalled));
146  EXPECT_EQ(net::ERR_UNEXPECTED, cancel_result);
147}
148
149TEST_F(LocalFileStreamWriterTest, CancelAfterFinishedOperation) {
150  base::FilePath path = CreateFileWithContent("file_a", std::string());
151  scoped_ptr<LocalFileStreamWriter> writer(CreateWriter(path, 0));
152  EXPECT_EQ(net::OK, WriteStringToWriter(writer.get(), "foo"));
153
154  // Cancel immediately fails when there's no in-flight operation.
155  int cancel_result = writer->Cancel(base::Bind(&NeverCalled));
156  EXPECT_EQ(net::ERR_UNEXPECTED, cancel_result);
157
158  writer.reset();
159  base::RunLoop().RunUntilIdle();
160  // Write operation is already completed.
161  EXPECT_TRUE(base::PathExists(path));
162  EXPECT_EQ("foo", GetFileContent(path));
163}
164
165TEST_F(LocalFileStreamWriterTest, CancelWrite) {
166  base::FilePath path = CreateFileWithContent("file_a", "foobar");
167  scoped_ptr<LocalFileStreamWriter> writer(CreateWriter(path, 0));
168
169  scoped_refptr<net::StringIOBuffer> buffer(new net::StringIOBuffer("xxx"));
170  int result =
171      writer->Write(buffer.get(), buffer->size(), base::Bind(&NeverCalled));
172  ASSERT_EQ(net::ERR_IO_PENDING, result);
173
174  net::TestCompletionCallback callback;
175  writer->Cancel(callback.callback());
176  int cancel_result = callback.WaitForResult();
177  EXPECT_EQ(net::OK, cancel_result);
178}
179
180}  // namespace content
181