public void TryGet_WithEmptyDictionaryAndTypedSymbol_ReturnsNoValue()
{
var symbol = new Symbol <int>();
var dictionary = new SymbolDictionary();
Assert.IsTrue(dictionary.TryGet(symbol) == Maybe <int> .NoValue);
}
public void GetSet_RoundTrip_WithUntypedSymbol()
{
var symbol = new Symbol();
var dictionary = new SymbolDictionary();
dictionary.Set(symbol, 42);
Assert.AreEqual(42, dictionary.Get <int>(symbol));
}
public void Set_WithNoValue_RemovesFromDictionary()
{
var symbol = new Symbol <int>();
var innerDictionary = new Dictionary <ISymbol, object> {
{ symbol, 42 }
};
var dictionary = new SymbolDictionary(innerDictionary);
dictionary.Set(symbol, Maybe <int> .NoValue);
Assert.AreEqual(0, innerDictionary.Count);
}
public void Set_ValueTwice_ReturnsSecondValue()
{
var symbol = new Symbol <int>();
var innerDictionary = new Dictionary <ISymbol, object> {
{ symbol, 42 }
};
var dictionary = new SymbolDictionary(innerDictionary);
dictionary.Set(symbol, 7);
dictionary.Set(symbol, 42);
Assert.AreEqual(1, innerDictionary.Count);
Assert.AreEqual(42, (int)innerDictionary[symbol]);
}
