| // Copyright 2008, Google Inc. |
| // All rights reserved. |
| // |
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| // modification, are permitted provided that the following conditions are |
| // met: |
| // |
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| // notice, this list of conditions and the following disclaimer. |
| // * Redistributions in binary form must reproduce the above |
| // copyright notice, this list of conditions and the following disclaimer |
| // in the documentation and/or other materials provided with the |
| // distribution. |
| // * Neither the name of Google Inc. nor the names of its |
| // contributors may be used to endorse or promote products derived from |
| // this software without specific prior written permission. |
| // |
| // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
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| // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
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| |
| #include "base/observer_list.h" |
| #include "testing/gtest/include/gtest/gtest.h" |
| |
| namespace { |
| |
| class ObserverListTest : public testing::Test { |
| }; |
| |
| class Foo { |
| public: |
| virtual void Observe(int x) = 0; |
| virtual ~Foo() {} |
| }; |
| |
| class Adder : public Foo { |
| public: |
| Adder(int scaler) : total(0), scaler_(scaler) {} |
| virtual void Observe(int x) { |
| total += x * scaler_; |
| } |
| virtual ~Adder() { } |
| int total; |
| private: |
| int scaler_; |
| }; |
| |
| class Disrupter : public Foo { |
| public: |
| Disrupter(ObserverList<Foo>& list, Foo* doomed) : list_(list), doomed_(doomed) { |
| } |
| virtual ~Disrupter() { } |
| virtual void Observe(int x) { |
| list_.RemoveObserver(doomed_); |
| } |
| private: |
| ObserverList<Foo>& list_; |
| Foo* doomed_; |
| }; |
| |
| } // namespace |
| |
| TEST(ObserverListTest, BasicTest) { |
| ObserverList<Foo> observer_list; |
| Adder a(1), b(-1), c(1), d(-1); |
| Disrupter evil(observer_list, &c); |
| |
| observer_list.AddObserver(&a); |
| observer_list.AddObserver(&b); |
| |
| FOR_EACH_OBSERVER(Foo, observer_list, Observe(10)); |
| |
| observer_list.AddObserver(&evil); |
| observer_list.AddObserver(&c); |
| observer_list.AddObserver(&d); |
| |
| FOR_EACH_OBSERVER(Foo, observer_list, Observe(10)); |
| |
| EXPECT_EQ(a.total, 20); |
| EXPECT_EQ(b.total, -20); |
| EXPECT_EQ(c.total, 0); |
| EXPECT_EQ(d.total, -10); |
| } |