public void ReadOperation_DelegatesToSourceDictionary_IfNoMutationsArePerformed()
{
// Arrange
var values = new List <object>();
var enumerator = Mock.Of <IEnumerator <KeyValuePair <string, object> > >();
var sourceDictionary = new Mock <IDictionary <string, object> >(MockBehavior.Strict);
sourceDictionary
.SetupGet(d => d.Count)
.Returns(100)
.Verifiable();
sourceDictionary
.SetupGet(d => d.Values)
.Returns(values)
.Verifiable();
sourceDictionary
.Setup(d => d.ContainsKey("test-key"))
.Returns(value: true)
.Verifiable();
sourceDictionary
.Setup(d => d.GetEnumerator())
.Returns(enumerator)
.Verifiable();
sourceDictionary
.Setup(d => d["key2"])
.Returns("key2-value")
.Verifiable();
object value;
sourceDictionary.Setup(d => d.TryGetValue("different-key", out value))
.Returns(false)
.Verifiable();
var copyOnWriteDictionary = new CopyOnWriteDictionary <string, object>(sourceDictionary.Object,
StringComparer.OrdinalIgnoreCase);
// Act and Assert
Assert.Equal("key2-value", copyOnWriteDictionary["key2"]);
Assert.Equal(100, copyOnWriteDictionary.Count);
Assert.Same(values, copyOnWriteDictionary.Values);
Assert.True(copyOnWriteDictionary.ContainsKey("test-key"));
Assert.Same(enumerator, copyOnWriteDictionary.GetEnumerator());
Assert.False(copyOnWriteDictionary.TryGetValue("different-key", out value));
sourceDictionary.Verify();
}
public void ReadOperation_DoesNotDelegateToSourceDictionary_OnceAValueIsChanged()
{
// Arrange
var values = new List <object>();
var sourceDictionary = new Dictionary <string, object>
{
{ "key1", "value1" },
{ "key2", "value2" }
};
var copyOnWriteDictionary = new CopyOnWriteDictionary <string, object>(
sourceDictionary,
StringComparer.OrdinalIgnoreCase);
// Act
copyOnWriteDictionary["key2"] = "value3";
// Assert
Assert.Equal("value2", sourceDictionary["key2"]);
Assert.Equal(2, copyOnWriteDictionary.Count);
Assert.Equal("value1", copyOnWriteDictionary["key1"]);
Assert.Equal("value3", copyOnWriteDictionary["key2"]);
}