public void EitherExistsFalseWhenLeft()
{
bool expected = false;
Either <string, int> either = "Hello World";
bool result =
EitherModule.Exists(
right => right == 10,
left => left == "Test"
, either);
Assert.AreEqual(expected, result);
}
public void EitherExistsTrueWhenRight()
{
bool expected = true;
Either <string, int> either = 10;
bool result =
EitherModule.Exists(
right => right == 10,
left => left == "Test"
, either);
Assert.AreEqual(expected, result);
}
/// <summary> /// Returns true if the given predicate functions return true when applied to either value. /// 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="predicateWhenLeft">A function that evaluates whether the left value contained in the option is valid or not.</param> /// <param name="predicateWhenRight">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 Exists <TLeft, TRight>(this Either <TLeft, TRight> either, Func <TRight, bool> predicateWhenRight, Func <TLeft, bool> predicateWhenLeft) => EitherModule.Exists(predicateWhenRight, predicateWhenLeft, either);