src/webkit/browser/fileapi/local_file_stream_writer_unittest.cc

   1 // Copyright (c) 2012 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 "webkit/browser/fileapi/local_file_stream_writer.h"
   6
   7 #include <string>
   8
   9 #include "base/callback.h"
  10 #include "base/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
  21 namespace fileapi {
  22
  23 class LocalFileStreamWriterTest : public testing::Test {
  24  public:
  25   LocalFileStreamWriterTest()
  26       : file_thread_("FileUtilProxyTestFileThread") {}
  27
  28   virtual void SetUp() OVERRIDE {
  29     ASSERT_TRUE(file_thread_.Start());
  30     ASSERT_TRUE(temp_dir_.CreateUniqueTempDir());
  31   }
  32
  33   virtual void TearDown() OVERRIDE {
  34     // Give another chance for deleted streams to perform Close.
  35     base::RunLoop().RunUntilIdle();
  36     file_thread_.Stop();
  37     base::RunLoop().RunUntilIdle();
  38   }
  39
  40  protected:
  41   base::FilePath Path(const std::string& name) {
  42     return temp_dir_.path().AppendASCII(name);
  43   }
  44
  45   int WriteStringToWriter(LocalFileStreamWriter* writer,
  46                           const std::string& data) {
  47     scoped_refptr<net::StringIOBuffer> buffer(new net::StringIOBuffer(data));
  48     scoped_refptr<net::DrainableIOBuffer> drainable(
  49         new net::DrainableIOBuffer(buffer.get(), buffer->size()));
  50
  51     while (drainable->BytesRemaining() > 0) {
  52       net::TestCompletionCallback callback;
  53       int result = writer->Write(
  54           drainable.get(), drainable->BytesRemaining(), callback.callback());
  55       if (result == net::ERR_IO_PENDING)
  56         result = callback.WaitForResult();
  57       if (result <= 0)
  58         return result;
  59       drainable->DidConsume(result);
  60     }
  61     return net::OK;
  62   }
  63
  64   std::string GetFileContent(const base::FilePath& path) {
  65     std::string content;
  66     base::ReadFileToString(path, &content);
  67     return content;
  68   }
  69
  70   base::FilePath CreateFileWithContent(const std::string& name,
  71                                  const std::string& data) {
  72     base::FilePath path = Path(name);
  73     file_util::WriteFile(path, data.c_str(), data.size());
  74     return path;
  75   }
  76
  77   base::MessageLoopProxy* file_task_runner() const {
  78     return file_thread_.message_loop_proxy().get();
  79   }
  80
  81   LocalFileStreamWriter* CreateWriter(const base::FilePath& path,
  82                                       int64 offset) {
  83     return new LocalFileStreamWriter(file_task_runner(), path, offset);
  84   }
  85
  86  private:
  87   base::MessageLoopForIO message_loop_;
  88   base::Thread file_thread_;
  89   base::ScopedTempDir temp_dir_;
  90 };
  91
  92 void NeverCalled(int unused) {
  93   ADD_FAILURE();
  94 }
  95
  96 TEST_F(LocalFileStreamWriterTest, Write) {
  97   base::FilePath path = CreateFileWithContent("file_a", std::string());
  98   scoped_ptr<LocalFileStreamWriter> writer(CreateWriter(path, 0));
  99   EXPECT_EQ(net::OK, WriteStringToWriter(writer.get(), "foo"));
 100   EXPECT_EQ(net::OK, WriteStringToWriter(writer.get(), "bar"));
 101   writer.reset();
 102   base::RunLoop().RunUntilIdle();
 103   EXPECT_TRUE(base::PathExists(path));
 104   EXPECT_EQ("foobar", GetFileContent(path));
 105 }
 106
 107 TEST_F(LocalFileStreamWriterTest, WriteMiddle) {
 108   base::FilePath path = CreateFileWithContent("file_a", "foobar");
 109   scoped_ptr<LocalFileStreamWriter> writer(CreateWriter(path, 2));
 110   EXPECT_EQ(net::OK, WriteStringToWriter(writer.get(), "xxx"));
 111   writer.reset();
 112   base::RunLoop().RunUntilIdle();
 113   EXPECT_TRUE(base::PathExists(path));
 114   EXPECT_EQ("foxxxr", GetFileContent(path));
 115 }
 116
 117 TEST_F(LocalFileStreamWriterTest, WriteEnd) {
 118   base::FilePath path = CreateFileWithContent("file_a", "foobar");
 119   scoped_ptr<LocalFileStreamWriter> writer(CreateWriter(path, 6));
 120   EXPECT_EQ(net::OK, WriteStringToWriter(writer.get(), "xxx"));
 121   writer.reset();
 122   base::RunLoop().RunUntilIdle();
 123   EXPECT_TRUE(base::PathExists(path));
 124   EXPECT_EQ("foobarxxx", GetFileContent(path));
 125 }
 126
 127 TEST_F(LocalFileStreamWriterTest, WriteFailForNonexistingFile) {
 128   base::FilePath path = Path("file_a");
 129   ASSERT_FALSE(base::PathExists(path));
 130   scoped_ptr<LocalFileStreamWriter> writer(CreateWriter(path, 0));
 131   EXPECT_EQ(net::ERR_FILE_NOT_FOUND, WriteStringToWriter(writer.get(), "foo"));
 132   writer.reset();
 133   base::RunLoop().RunUntilIdle();
 134   EXPECT_FALSE(base::PathExists(path));
 135 }
 136
 137 TEST_F(LocalFileStreamWriterTest, CancelBeforeOperation) {
 138   base::FilePath path = Path("file_a");
 139   scoped_ptr<LocalFileStreamWriter> writer(CreateWriter(path, 0));
 140   // Cancel immediately fails when there's no in-flight operation.
 141   int cancel_result = writer->Cancel(base::Bind(&NeverCalled));
 142   EXPECT_EQ(net::ERR_UNEXPECTED, cancel_result);
 143 }
 144
 145 TEST_F(LocalFileStreamWriterTest, CancelAfterFinishedOperation) {
 146   base::FilePath path = CreateFileWithContent("file_a", std::string());
 147   scoped_ptr<LocalFileStreamWriter> writer(CreateWriter(path, 0));
 148   EXPECT_EQ(net::OK, WriteStringToWriter(writer.get(), "foo"));
 149
 150   // Cancel immediately fails when there's no in-flight operation.
 151   int cancel_result = writer->Cancel(base::Bind(&NeverCalled));
 152   EXPECT_EQ(net::ERR_UNEXPECTED, cancel_result);
 153
 154   writer.reset();
 155   base::RunLoop().RunUntilIdle();
 156   // Write operation is already completed.
 157   EXPECT_TRUE(base::PathExists(path));
 158   EXPECT_EQ("foo", GetFileContent(path));
 159 }
 160
 161 TEST_F(LocalFileStreamWriterTest, CancelWrite) {
 162   base::FilePath path = CreateFileWithContent("file_a", "foobar");
 163   scoped_ptr<LocalFileStreamWriter> writer(CreateWriter(path, 0));
 164
 165   scoped_refptr<net::StringIOBuffer> buffer(new net::StringIOBuffer("xxx"));
 166   int result =
 167       writer->Write(buffer.get(), buffer->size(), base::Bind(&NeverCalled));
 168   ASSERT_EQ(net::ERR_IO_PENDING, result);
 169
 170   net::TestCompletionCallback callback;
 171   writer->Cancel(callback.callback());
 172   int cancel_result = callback.WaitForResult();
 173   EXPECT_EQ(net::OK, cancel_result);
 174 }
 175
 176 }  // namespace fileapi