public void TestSubStringStartIndexNull()
{
var function = new SubStringFunction();
Assert.That(function.Evaluate("abcdefg", null, 3), Is.EqualTo("abc"));
}
public void TestSubStringEndIndexNull()
{
var function = new SubStringFunction();
Assert.That(function.Evaluate("abcdefg", 3, null), Is.EqualTo("defg"));
}
public void TestSubStringAllNull()
{
var function = new SubStringFunction();
Assert.That(function.Evaluate(null, null, null), Is.EqualTo(""));
}
public void TestSubStringBothStartAndEndNull()
{
var function = new SubStringFunction();
Assert.That(function.Evaluate("abcdefg", null, null), Is.EqualTo("abcdefg"));
}
public void TesAllFilled()
{
var function = new SubStringFunction();
Assert.That(function.Evaluate("abcdefg", 3, 5), Is.EqualTo("de"));
}
