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      1 //
      2 // Copyright (C) 2014 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/property_observer.h"
     18 
     19 #include <string>
     20 
     21 #include <base/bind.h>
     22 #include <gmock/gmock.h>
     23 #include <gtest/gtest.h>
     24 
     25 #include "shill/accessor_interface.h"
     26 #include "shill/error.h"
     27 
     28 using base::Bind;
     29 using base::Unretained;
     30 using testing::_;
     31 using testing::DoAll;
     32 using testing::Mock;
     33 using testing::Return;
     34 
     35 namespace shill {
     36 
     37 class TestPropertyAccessor : public AccessorInterface<bool> {
     38  public:
     39   MOCK_METHOD1(Clear, void(Error* error));
     40   MOCK_METHOD1(Get, bool(Error* error));
     41   MOCK_METHOD2(Set, bool(const bool& value, Error* error));
     42 };
     43 
     44 class PropertyObserverTest : public testing::Test {
     45  public:
     46   PropertyObserverTest()
     47      : test_accessor_(new TestPropertyAccessor()),
     48        bool_accessor_(test_accessor_) {}
     49   virtual ~PropertyObserverTest() {}
     50 
     51   MOCK_METHOD1(TestCallback, void(const bool& value));
     52 
     53   // Invoked method during expectations.
     54   void SetError(Error* error) {
     55     error->Populate(Error::kPermissionDenied);
     56   }
     57 
     58  protected:
     59   bool GetSavedValue(const PropertyObserver<bool>& observer) {
     60     return observer.saved_value_;
     61   }
     62 
     63   TestPropertyAccessor* test_accessor_;
     64   BoolAccessor bool_accessor_;  // Owns reference to |test_accessor_|.
     65 };
     66 
     67 TEST_F(PropertyObserverTest, Callback) {
     68   EXPECT_CALL(*test_accessor_, Get(_)).WillOnce(Return(true));
     69   EXPECT_CALL(*this, TestCallback(_)).Times(0);
     70   PropertyObserver<bool> observer(bool_accessor_,
     71                                   Bind(&PropertyObserverTest::TestCallback,
     72                                        Unretained(this)));
     73   EXPECT_TRUE(GetSavedValue(observer));
     74   Mock::VerifyAndClearExpectations(test_accessor_);
     75 
     76   // Accessor returns an error.
     77   EXPECT_CALL(*test_accessor_, Get(_))
     78       .WillOnce(DoAll(Invoke(this, &PropertyObserverTest::SetError),
     79                       Return(false)));
     80   observer.Update();
     81 
     82   // Value remains unchanged.
     83   EXPECT_CALL(*test_accessor_, Get(_)).WillOnce(Return(true));
     84   observer.Update();
     85   Mock::VerifyAndClearExpectations(test_accessor_);
     86   Mock::VerifyAndClearExpectations(this);
     87 
     88   // Value changes.
     89   EXPECT_CALL(*test_accessor_, Get(_)).WillOnce(Return(false));
     90   EXPECT_CALL(*this, TestCallback(false));
     91   observer.Update();
     92   EXPECT_FALSE(GetSavedValue(observer));
     93   Mock::VerifyAndClearExpectations(test_accessor_);
     94   Mock::VerifyAndClearExpectations(this);
     95 
     96   // Value remains unchanged (false).
     97   EXPECT_CALL(*test_accessor_, Get(_)).WillOnce(Return(false));
     98   EXPECT_CALL(*this, TestCallback(_)).Times(0);
     99   observer.Update();
    100 }
    101 
    102 }  // namespace shill
    103