public void WhenListWithRepeatedIntegerValuesThenDistinctShouldReturnListWithSameCount()
{
List <Foo> sourceList = new List <Foo>();
sourceList.Add(new Foo()
{
IntProp = 42, StringProp = "First String"
});
sourceList.Add(new Foo()
{
IntProp = 42, StringProp = "Second String"
});
sourceList.Add(new Foo()
{
IntProp = 42, StringProp = "Second String"
});
sourceList.Add(new Foo()
{
IntProp = 41, StringProp = "Third String"
});
sourceList.Add(new Foo()
{
IntProp = 40, StringProp = "Fourth String"
});
var distinctEnumerable = IEnumerableUtil.DistinctBy(sourceList, f => f.IntProp);
Assert.AreEqual(3, distinctEnumerable.Count());
}
public void WhenNullListThenDistinctShouldThrowArgumentNullException()
{
List <Foo> sourceList = null;
Assert.ThrowsException <ArgumentNullException>(() => { IEnumerableUtil.DistinctBy(sourceList, f => f.IntProp).ToList(); });
}