public void RewriteShouldReplaceNull()
{
// Arrange
var subject = new SqlQueryHelper.Parser();
// Act
var result = subject.Rewrite(@"null");
var result1 = subject.Rewrite(@"is not null");
var result2 = subject.Rewrite(@"is null");
// Assert
Assert.AreEqual(@"?", result);
Assert.AreEqual(@"?null?", result1);
Assert.AreEqual(@"?null?", result2);
}