content/browser/fileapi/local_file_stream_writer_unittest.cc

   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/run_loop.h"
  15 #include "base/single_thread_task_runner.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 using storage::FileStreamWriter;
  22 using storage::LocalFileStreamWriter;
  23
  24 namespace content {
  25
  26 class LocalFileStreamWriterTest : public testing::Test {
  27  public:
  28   LocalFileStreamWriterTest()
  29       : file_thread_("FileUtilProxyTestFileThread") {}
  30
  31   void SetUp() override {
  32     ASSERT_TRUE(file_thread_.Start());
  33     ASSERT_TRUE(temp_dir_.CreateUniqueTempDir());
  34   }
  35
  36   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::SingleThreadTaskRunner* file_task_runner() const {
  81     return file_thread_.task_runner().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
  96 void NeverCalled(int unused) {
  97   ADD_FAILURE();
  98 }
  99
 100 TEST_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
 111 TEST_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
 121 TEST_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
 131 TEST_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
 141 TEST_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
 149 TEST_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
 165 TEST_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