public void ShouldCreateNotExpression() { var factory = new DbExpressionFactory(); var expression = factory.Not(factory.In(factory.Column("SomeColumn"), new object[] { 1, 2 })); Assert.IsNotNull(expression.Operand); Assert.IsTrue(expression.ExpressionType == DbExpressionType.Unary); Assert.IsTrue(expression.UnaryExpressionType == DbUnaryExpressionType.Not); }