Repo created

libs/base/base_tests/observer_list_test.cpp

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+#include "testing/testing.hpp"
+
+#include "base/observer_list.hpp"
+
+#include <string>
+
+namespace
+{
+struct Observer
+{
+  Observer() : status(0) {}
+
+  void OnOperationCompleted(std::string const & message, int status)
+  {
+    this->message = message;
+    this->status = status;
+  }
+
+  std::string message;
+  int status;
+};
+}  // namespace
+
+UNIT_TEST(ObserverList_Basic)
+{
+  Observer observer0;
+  Observer observer1;
+  Observer observer2;
+
+  base::ObserverListSafe<Observer> observers;
+
+  // Register all observers in a list. Also check that it's not
+  // possible to add the same observer twice.
+  TEST(observers.Add(observer0), ());
+  TEST(!observers.Add(observer0), ());
+
+  TEST(observers.Add(observer1), ());
+  TEST(!observers.Add(observer1), ());
+
+  TEST(observers.Add(observer2), ());
+  TEST(!observers.Add(observer2), ());
+
+  TEST(!observers.Add(observer1), ());
+  TEST(!observers.Add(observer2), ());
+
+  std::string const message = "HTTP OK";
+  observers.ForEach(&Observer::OnOperationCompleted, message, 204);
+
+  // Check observers internal state.
+  TEST_EQUAL(message, observer0.message, ());
+  TEST_EQUAL(204, observer0.status, ());
+
+  TEST_EQUAL(message, observer1.message, ());
+  TEST_EQUAL(204, observer1.status, ());
+
+  TEST_EQUAL(message, observer2.message, ());
+  TEST_EQUAL(204, observer2.status, ());
+
+  // Remove all observers from a list.
+  TEST(observers.Remove(observer0), ());
+  TEST(!observers.Remove(observer0), ());
+
+  TEST(observers.Remove(observer1), ());
+  TEST(!observers.Remove(observer1), ());
+
+  TEST(observers.Remove(observer2), ());
+  TEST(!observers.Remove(observer2), ());
+}