public void TestGenericNullRefConverter()
{
var converter = new GenericOptionJsonConverter(typeof(Maybe <>));
Assert.True(converter.CanConvert(Maybes.None.GetType()));
TestOptionsConverter(converter, Maybes.Some(Boxed.Of(42)));
}
/// <summary>
/// Tries to get a value out of a dictionary of reference types by its key, returns None maybe if it fails.
/// </summary>
/// <typeparam name="TK">Type of the key of the dictionary.</typeparam>
/// <typeparam name="TV">Type of the value of the dictionary.</typeparam>
/// <param name="dict">The dictionary to look through.</param>
/// <param name="key">The key to look for.</param>
/// <returns>A maybe of the dictionary's value type.</returns>
public static Maybe <TV> GetMaybe <TK, TV>(this IReadOnlyDictionary <TK, TV> dict, TK key)
where TV : class =>
dict.TryGetValue(key, out var value) ? Maybes.Some(value) : Maybes.None;
public void Test_FirstMaybeWithPredicate_NotEmpty_Some()
{
Assert.IsTrue(Maybes.Some <object>(new object()).FirstMaybe(_ => true).HasValue);
}
public void Test_FirstMaybe_NotEmpty_Some()
{
Assert.IsTrue(Maybes.Some <object>(new object()).FirstMaybe().HasValue);
}
public void Test_FirstMaybeWithFalsePredicate_NotEmpty_None()
{
Assert.IsFalse(Maybes.Some <object>(new object()).FirstMaybe(_ => false).HasValue);
}