public void EitherExistsRightFalseWhenLeft() { bool expected = false; Either <string, int> either = "Hello"; bool result = EitherModule.ExistsRight( left => left == 10 , either); Assert.AreEqual(expected, result); }
public void EitherExistsRightTrueWhenRight() { bool expected = true; Either <string, int> either = 10; bool result = EitherModule.ExistsRight( left => left == 10 , either); Assert.AreEqual(expected, result); }
/// <summary> /// Returns true when <paramref name="either"/> <see cref="Either{TLeft, TRight}.IsRight"/> and given <paramref name="predicate"/> function applied to <paramref name="either"/> return true. /// Otherwise, returns false. /// </summary> /// <typeparam name="TLeft">The type of the left value.</typeparam> /// <typeparam name="TRight">The type of the right value.</typeparam> /// <param name="predicate">A function that evaluates whether the right value contained in the option is valid or not.</param> /// <param name="either">the input either.</param> /// <returns> /// Returns true if the given predicate functions return true when applied to either value. /// </returns> public static bool ExistsRight <TLeft, TRight>(this Either <TLeft, TRight> either, Func <TRight, bool> predicate) => EitherModule.ExistsRight(predicate, either);