public static void VerifyGreaterThan <T>(this IComparable <T> item, T value, string parameterName)
{
if (item.IsLessThanOrEqualTo(value))
{
throw new ArgumentOutOfRangeException(parameterName);
}
}
public static void IsLessThanOrEqualTo()
{
IComparable <string> instance = null;
string value = null;
var result = false;
When("an extension is called", () =>
{
Act(() =>
{
result = instance.IsLessThanOrEqualTo(value);
});
And("an instance is null", () =>
{
instance = null;
Should("return false", () =>
{
Assert.That(result, Is.False);
});
});
And("an instance is not null", () =>
{
value = "121";
And("the instance is less than the value", () =>
{
instance = "111";
Should("return true", () =>
{
Assert.That(result, Is.True);
});
});
And("the instance is greater than the value", () =>
{
instance = "131";
Should("return false", () =>
{
Assert.That(result, Is.False);
});
});
And("the instance is equal to the value", () =>
{
instance = "121";
Should("return true", () =>
{
Assert.That(result, Is.True);
});
});
});
});
}
public void When_IsLessThanOrEqualTo_is_called_with_a_same_value()
{
// Arrange.
IComparable <int> value = 10;
// Act.
bool result = value.IsLessThanOrEqualTo(10);
// Assert.
result.Should().Be(true);
}
public static bool IsBetween <T>(this IComparable <T> item, T minimum, T maximum, bool inclusive)
{
if (inclusive)
{
return(item.IsGreaterThanOrEqualTo(minimum) || item.IsLessThanOrEqualTo(maximum));
}
else
{
return(item.IsGreaterThan(minimum) || item.IsLessThan(maximum));
}
}
/// <summary> /// Returns whether the specified <see cref="IComparable"/> is between two ranges (inclusive) /// </summary> public static bool IsBetweenInclusive(this IComparable comparable, IComparable lower, IComparable upper) => comparable.IsGreaterThanOrEqualTo(lower) && comparable.IsLessThanOrEqualTo(upper);