public void Count_With_Enumerable_ValueType(int expected)
{
// Arrange
IEnumerable <int> source = TestEnumerable.ValueType(expected);
// Act
var result = source.Count();
// Assert
result.Should().Be(expected);
}
public void Single_With_MoreThanElement_Should_Throw()
{
// Arrange
var empty = TestEnumerable.ValueType(2);
// Act
Action action = () => empty.SingleOrDefault();
// Assert
action.Should()
.ThrowExactly <InvalidOperationException>()
.WithMessage("Sequence contains more than one element");
}
public void First_With_EmptyIEnumerable_Should_Throw()
{
// Arrange
var empty = TestEnumerable.ValueType(0);
// Act
Action action = () => empty.First();
// Assert
action.Should()
.ThrowExactly <InvalidOperationException>()
.WithMessage("Sequence contains no elements");
}