public void Should_use_provided_comparer()
{
var caseInsensitiveComparer = new ProjectionEqualityComparer <string, string>(s => s, StringComparer.OrdinalIgnoreCase);
caseInsensitiveComparer.GetHashCode("value").Should().Be(caseInsensitiveComparer.GetHashCode("VALUE"));
var caseSensitiveComparer = new ProjectionEqualityComparer <string, string>(s => s, StringComparer.Ordinal);
caseSensitiveComparer.GetHashCode("value").Should().NotBe(caseSensitiveComparer.GetHashCode("VALUE"));
}
public void Should_return_hashcode_of_nulls()
{
var comparer = new ProjectionEqualityComparer <string, string>(s => s);
comparer.GetHashCode(null).Should().Be(0);
}
public void Should_return_hashcode_of_projected_objects()
{
var comparer = new ProjectionEqualityComparer <string, string>(s => s.Substring(0, 3));
comparer.GetHashCode("value").Should().Be(comparer.GetHashCode("val"));
}