1 // 2 // Copyright (C) 2012 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 #include "shill/mock_log.h" 18 19 #include <string> 20 21 #include <gtest/gtest.h> 22 23 using std::string; 24 using testing::_; 25 using testing::AnyNumber; 26 27 namespace shill { 28 29 ScopedMockLog* ScopedMockLog::instance_ = nullptr; 30 31 ScopedMockLog::ScopedMockLog() { 32 previous_handler_ = ::logging::GetLogMessageHandler(); 33 ::logging::SetLogMessageHandler(HandleLogMessages); 34 instance_ = this; 35 } 36 37 ScopedMockLog::~ScopedMockLog() { 38 ::logging::SetLogMessageHandler(previous_handler_); 39 instance_ = nullptr; 40 } 41 42 // static 43 bool ScopedMockLog::HandleLogMessages(int severity, 44 const char* file, 45 int line, 46 size_t message_start, 47 const string& full_message) { 48 CHECK(instance_); 49 50 // |full_message| looks like this if it came through MemoryLog: 51 // "[0514/165501:INFO:mock_log_unittest.cc(22)] Some message\n" 52 // The user wants to match just the substring "Some message". Strip off the 53 // extra stuff. |message_start| is the position where "Some message" begins. 54 // 55 // Note that the -1 is to remove the trailing return line. 56 const string::size_type message_length = 57 full_message.length() - message_start - 1; 58 const string message(full_message, message_start, message_length); 59 60 // Call Log. Because Log is a mock method, this sets in motion the mocking 61 // magic. 62 instance_->Log(severity, file, message); 63 64 // Invoke the previously installed message handler if there was one. 65 if (instance_->previous_handler_) { 66 return (*instance_->previous_handler_)(severity, file, line, 67 message_start, full_message); 68 } 69 70 // Return false so that messages show up on stderr. 71 return false; 72 } 73 74 NiceScopedMockLog::NiceScopedMockLog() : ScopedMockLog() { 75 EXPECT_CALL(*this, Log(_, _, _)).Times(AnyNumber()); 76 } 77 78 NiceScopedMockLog::~NiceScopedMockLog() {} 79 80 } // namespace shill 81
