public void NullIsAValidValue()
{
WeakRefDictionary <object, object> dict = new WeakRefDictionary <object, object>();
dict.Add("foo", null);
Assert.Null(dict["foo"]);
}
public void CanFindOutIfContainsAKey()
{
WeakRefDictionary <object, object> dict = new WeakRefDictionary <object, object>();
dict.Add("foo", null);
Assert.True(dict.ContainsKey("foo"));
Assert.False(dict.ContainsKey("foo2"));
}
public void CanRegisterObjectAndFindItByID()
{
object o = new object();
WeakRefDictionary <object, object> dict = new WeakRefDictionary <object, object>();
dict.Add("foo", o);
Assert.NotNull(dict["foo"]);
Assert.Same(o, dict["foo"]);
}
public void CanAddSameObjectTwiceWithDifferentKeys()
{
object o = new object();
WeakRefDictionary <object, object> dict = new WeakRefDictionary <object, object>();
dict.Add("foo1", o);
dict.Add("foo2", o);
Assert.Same(dict["foo1"], dict["foo2"]);
}
public void CanAddItemAfterPreviousItemIsCollected()
{
WeakRefDictionary <object, object> dict = new WeakRefDictionary <object, object>();
dict.Add("foo", new object());
GC.Collect();
dict.Add("foo", new object());
}
public void AskingForAKeyThatDoesntExistThrows()
{
WeakRefDictionary <object, object> dict = new WeakRefDictionary <object, object>();
Assert.Throws <KeyNotFoundException>(
delegate
{
object unused = dict["foo"];
});
}
public void KeyCanBeOfArbitraryType()
{
object oKey = new object();
object oVal = new object();
WeakRefDictionary <object, object> dict = new WeakRefDictionary <object, object>();
dict.Add(oKey, oVal);
Assert.Same(oVal, dict[oKey]);
}
public void RemovingAKeyOfOneObjectDoesNotAffectOtherKeysForSameObject()
{
object o = new object();
WeakRefDictionary <object, object> dict = new WeakRefDictionary <object, object>();
dict.Add("foo1", o);
dict.Add("foo2", o);
dict.Remove("foo1");
Assert.Same(o, dict["foo2"]);
}
public void CanRegisterTwoObjectsAndGetThemBoth()
{
object o1 = new object();
object o2 = new object();
WeakRefDictionary <object, object> dict = new WeakRefDictionary <object, object>();
dict.Add("foo1", o1);
dict.Add("foo2", o2);
Assert.Same(o1, dict["foo1"]);
Assert.Same(o2, dict["foo2"]);
}
public void RemovingAKeyDoesNotAffectOtherKeys()
{
object o1 = new object();
object o2 = new object();
WeakRefDictionary <object, object> dict = new WeakRefDictionary <object, object>();
dict.Add("foo1", o1);
dict.Add("foo2", o2);
dict.Remove("foo1");
Assert.Same(o2, dict["foo2"]);
}
public void AddingToSameKeyTwiceAlwaysThrows()
{
object o = new object();
WeakRefDictionary <object, object> dict = new WeakRefDictionary <object, object>();
dict.Add("foo1", o);
Assert.Throws <ArgumentException>(
delegate
{
dict.Add("foo1", o);
});
}
public void RegistrationDoesNotPreventGarbageCollection()
{
WeakRefDictionary <object, object> dict = new WeakRefDictionary <object, object>();
dict.Add("foo", new object());
GC.Collect();
Assert.Throws <KeyNotFoundException>(
delegate
{
object unused = dict["foo"];
});
}
public void CanRemoveAnObjectThatWasAlreadyAdded()
{
object o = new object();
WeakRefDictionary <object, object> dict = new WeakRefDictionary <object, object>();
dict.Add("foo", o);
dict.Remove("foo");
Assert.Throws <KeyNotFoundException>(
delegate
{
object unused = dict["foo"];
});
}
public void CountReturnsNumberOfKeysWithLiveValues()
{
object o = new object();
WeakRefDictionary <object, object> dict = new WeakRefDictionary <object, object>();
dict.Add("foo1", o);
dict.Add("foo2", o);
Assert.Equal(2, dict.Count);
o = null;
GC.Collect();
Assert.Equal(0, dict.Count);
}
public void CanEnumerate()
{
object o1 = new object();
object o2 = new object();
WeakRefDictionary <object, object> dict = new WeakRefDictionary <object, object>();
dict.Add("foo1", o1);
dict.Add("foo2", o2);
foreach (KeyValuePair <object, object> kvp in dict)
{
Assert.NotNull(kvp);
Assert.NotNull(kvp.Key);
Assert.NotNull(kvp.Value);
}
}
public void RemovingANonExistantKeyDoesntThrow()
{
WeakRefDictionary <object, object> dict = new WeakRefDictionary <object, object>();
dict.Remove("foo1");
}