public void ByTest1()
{
var actual = new KeyEqualityComparer <String, String>(x => x, new StringLengthComparer());
var equals = actual.Equals("test", "1234");
equals.Should()
.BeTrue();
}
public void ByTest()
{
var actual = new KeyEqualityComparer <String, Int32>(x => x.Length, null);
var equals = actual.Equals("test", "1234");
equals.Should()
.BeTrue();
}
/// <summary>
/// Determines whether a sequence contains the specified element.
/// </summary>
public static bool EqualsAny <TElement, TKey>(this TElement element, IEnumerable <TElement> source, Func <TElement, TKey> keySelector)
{
_ = element ?? throw new ArgumentNullException(nameof(element));
_ = source ?? throw new ArgumentNullException(nameof(source));
_ = keySelector ?? throw new ArgumentNullException(nameof(keySelector));
var equalityComparer = new KeyEqualityComparer <TElement, TKey>(keySelector);
return(source.Any(i => equalityComparer.Equals(i, element)));
}
public void TestStringAndInts(string str1, string str2, bool bExpected)
{
var keyComparer = new KeyEqualityComparer <string, int>(str => str.Length);
Assert.AreEqual(keyComparer.Equals(str1, str2), bExpected);
}
public void TestStrings(string str1, string str2, bool bExpected)
{
var keyComparer = new KeyEqualityComparer <string, string>(str => str.ToLower());
Assert.AreEqual(keyComparer.Equals(str1, str2), bExpected);
}
public void TestInts(int x, int y, bool ret)
{
var keyComparer = new KeyEqualityComparer <int, int>(i => i % 2);
Assert.AreEqual(keyComparer.Equals(x, y), ret);
}
