public void Clear_ShouldClearTheCollection()
 {
     ConfigurationElementCollectionMock configurationElementCollection = new ConfigurationElementCollectionMock
     {
         new ConfigurationElementMock {Name = "1"},
         new ConfigurationElementMock {Name = "2"},
         new ConfigurationElementMock {Name = "3"}
     };
     Assert.AreEqual(3, configurationElementCollection.Count);
     configurationElementCollection.Clear();
     Assert.AreEqual(0, configurationElementCollection.Count);
 }
        public void Insert_ShouldInsertTheItemAtTheGivenIndex()
        {
            ConfigurationElementMock firstConfigurationElement = new ConfigurationElementMock {Name = "1"};
            ConfigurationElementMock secondConfigurationElement = new ConfigurationElementMock {Name = "2"};
            ConfigurationElementMock thirdConfigurationElement = new ConfigurationElementMock {Name = "3"};

            ConfigurationElementCollectionMock configurationElementCollection = new ConfigurationElementCollectionMock
            {
                firstConfigurationElement,
                secondConfigurationElement,
                thirdConfigurationElement
            };

            Assert.AreEqual(firstConfigurationElement, configurationElementCollection[0]);
            Assert.AreEqual(secondConfigurationElement, configurationElementCollection[1]);
            Assert.AreEqual(thirdConfigurationElement, configurationElementCollection[2]);

            configurationElementCollection.Clear();

            configurationElementCollection.Insert(0, firstConfigurationElement);
            configurationElementCollection.Insert(0, secondConfigurationElement);
            configurationElementCollection.Insert(0, thirdConfigurationElement);

            Assert.AreEqual(thirdConfigurationElement, configurationElementCollection[0]);
            Assert.AreEqual(secondConfigurationElement, configurationElementCollection[1]);
            Assert.AreEqual(firstConfigurationElement, configurationElementCollection[2]);
        }