1 //
2 // Copyright (C) 2015 The Android Open Source Project
3 //
4 // Licensed under the Apache License, Version 2.0 (the "License");
5 // you may not use this file except in compliance with the License.
6 // You may obtain a copy of the License at
7 //
8 //      http://www.apache.org/licenses/LICENSE-2.0
9 //
10 // Unless required by applicable law or agreed to in writing, software
11 // distributed under the License is distributed on an "AS IS" BASIS,
12 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 // See the License for the specific language governing permissions and
14 // limitations under the License.
15 //
16 
17 #ifndef UPDATE_ENGINE_PAYLOAD_CONSUMER_FAKE_EXTENT_WRITER_H_
18 #define UPDATE_ENGINE_PAYLOAD_CONSUMER_FAKE_EXTENT_WRITER_H_
19 
20 #include <memory>
21 
22 #include <brillo/secure_blob.h>
23 
24 #include "update_engine/payload_consumer/extent_writer.h"
25 
26 namespace chromeos_update_engine {
27 
28 // FakeExtentWriter is a concrete ExtentWriter subclass that keeps track of all
29 // the written data, useful for testing.
30 class FakeExtentWriter : public ExtentWriter {
31  public:
32   FakeExtentWriter() = default;
33   ~FakeExtentWriter() override = default;
34 
35   // ExtentWriter overrides.
36   bool Init(FileDescriptorPtr /* fd */,
37             const google::protobuf::RepeatedPtrField<Extent>& /* extents */,
38             uint32_t /* block_size */) override {
39     init_called_ = true;
40     return true;
41   };
42   bool Write(const void* bytes, size_t count) override {
43     if (!init_called_)
44       return false;
45     written_data_.insert(written_data_.end(),
46                          reinterpret_cast<const uint8_t*>(bytes),
47                          reinterpret_cast<const uint8_t*>(bytes) + count);
48     return true;
49   }
50 
51   // Fake methods.
52   bool InitCalled() { return init_called_; }
53   brillo::Blob WrittenData() { return written_data_; }
54 
55  private:
56   bool init_called_{false};
57   brillo::Blob written_data_;
58 
59   DISALLOW_COPY_AND_ASSIGN(FakeExtentWriter);
60 };
61 
62 }  // namespace chromeos_update_engine
63 
64 #endif  // UPDATE_ENGINE_PAYLOAD_CONSUMER_FAKE_EXTENT_WRITER_H_
65