public void ValidateStringNotToBeNull()
{
// Given
var validator = new StringInverseValidator("string");
// When
validator.BeNull();
// Then
Assert.True(true);
}
public void ValidateStringNotToBeNullViolated()
{
// Given
var validator = new StringInverseValidator(null);
// When
var exception = Assert.Throws <XunitException>(() => validator.BeNull(because: "that's the bottom line"));
// Then
Assert.NotNull(exception);
var rn = Environment.NewLine;
Assert.Equal(
$"{rn}validator{rn}is \"\"{rn}but was expected not to be null{rn}because that's the bottom line",
exception.UserMessage);
}