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      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 "net/base/mock_file_stream.h"
      6 
      7 #include "base/bind.h"
      8 #include "base/message_loop/message_loop.h"
      9 
     10 namespace net {
     11 
     12 namespace testing {
     13 
     14 MockFileStream::MockFileStream(
     15     const scoped_refptr<base::TaskRunner>& task_runner)
     16     : net::FileStream(task_runner),
     17       forced_error_(net::OK),
     18       async_error_(false),
     19       throttled_(false),
     20       weak_factory_(this) {
     21 }
     22 
     23 MockFileStream::MockFileStream(
     24     base::File file,
     25     const scoped_refptr<base::TaskRunner>& task_runner)
     26     : net::FileStream(file.Pass(), task_runner),
     27       forced_error_(net::OK),
     28       async_error_(false),
     29       throttled_(false),
     30       weak_factory_(this) {
     31 }
     32 
     33 MockFileStream::~MockFileStream() {
     34 }
     35 
     36 int MockFileStream::Seek(base::File::Whence whence, int64 offset,
     37                          const Int64CompletionCallback& callback) {
     38   Int64CompletionCallback wrapped_callback =
     39       base::Bind(&MockFileStream::DoCallback64,
     40                  weak_factory_.GetWeakPtr(), callback);
     41   if (forced_error_ == net::OK)
     42     return FileStream::Seek(whence, offset, wrapped_callback);
     43   return ErrorCallback64(wrapped_callback);
     44 }
     45 
     46 int MockFileStream::Read(IOBuffer* buf,
     47                          int buf_len,
     48                          const CompletionCallback& callback) {
     49   CompletionCallback wrapped_callback = base::Bind(&MockFileStream::DoCallback,
     50                                                    weak_factory_.GetWeakPtr(),
     51                                                    callback);
     52   if (forced_error_ == net::OK)
     53     return FileStream::Read(buf, buf_len, wrapped_callback);
     54   return ErrorCallback(wrapped_callback);
     55 }
     56 
     57 int MockFileStream::Write(IOBuffer* buf,
     58                           int buf_len,
     59                           const CompletionCallback& callback) {
     60   CompletionCallback wrapped_callback = base::Bind(&MockFileStream::DoCallback,
     61                                                    weak_factory_.GetWeakPtr(),
     62                                                    callback);
     63   if (forced_error_ == net::OK)
     64     return FileStream::Write(buf, buf_len, wrapped_callback);
     65   return ErrorCallback(wrapped_callback);
     66 }
     67 
     68 int MockFileStream::Flush(const CompletionCallback& callback) {
     69   CompletionCallback wrapped_callback = base::Bind(&MockFileStream::DoCallback,
     70                                                    weak_factory_.GetWeakPtr(),
     71                                                    callback);
     72   if (forced_error_ == net::OK)
     73     return FileStream::Flush(wrapped_callback);
     74   return ErrorCallback(wrapped_callback);
     75 }
     76 
     77 void MockFileStream::ThrottleCallbacks() {
     78   CHECK(!throttled_);
     79   throttled_ = true;
     80 }
     81 
     82 void MockFileStream::ReleaseCallbacks() {
     83   CHECK(throttled_);
     84   throttled_ = false;
     85 
     86   if (!throttled_task_.is_null()) {
     87     base::Closure throttled_task = throttled_task_;
     88     throttled_task_.Reset();
     89     base::MessageLoop::current()->PostTask(FROM_HERE, throttled_task);
     90   }
     91 }
     92 
     93 void MockFileStream::DoCallback(const CompletionCallback& callback,
     94                                 int result) {
     95   if (!throttled_) {
     96     callback.Run(result);
     97     return;
     98   }
     99   CHECK(throttled_task_.is_null());
    100   throttled_task_ = base::Bind(callback, result);
    101 }
    102 
    103 void MockFileStream::DoCallback64(const Int64CompletionCallback& callback,
    104                                   int64 result) {
    105   if (!throttled_) {
    106     callback.Run(result);
    107     return;
    108   }
    109   CHECK(throttled_task_.is_null());
    110   throttled_task_ = base::Bind(callback, result);
    111 }
    112 
    113 int MockFileStream::ErrorCallback(const CompletionCallback& callback) {
    114   CHECK_NE(net::OK, forced_error_);
    115   if (async_error_) {
    116     base::MessageLoop::current()->PostTask(
    117         FROM_HERE, base::Bind(callback, forced_error_));
    118     clear_forced_error();
    119     return net::ERR_IO_PENDING;
    120   }
    121   int ret = forced_error_;
    122   clear_forced_error();
    123   return ret;
    124 }
    125 
    126 int64 MockFileStream::ErrorCallback64(const Int64CompletionCallback& callback) {
    127   CHECK_NE(net::OK, forced_error_);
    128   if (async_error_) {
    129     base::MessageLoop::current()->PostTask(
    130         FROM_HERE, base::Bind(callback, forced_error_));
    131     clear_forced_error();
    132     return net::ERR_IO_PENDING;
    133   }
    134   int64 ret = forced_error_;
    135   clear_forced_error();
    136   return ret;
    137 }
    138 
    139 }  // namespace testing
    140 
    141 }  // namespace net
    142