Deveel.Data.AssignTests.Existing C# (CSharp) Method

        public void Existing()
        {
            var result = AdminQuery.Assign("a", SqlExpression.Constant(7689));

            Assert.IsNotNull(result);
            Assert.IsInstanceOf<NumericType>(result.Type);

            var variable = AdminQuery.Context.FindVariable("a");
            Assert.IsNotNull(variable);
            Assert.IsNotNull(variable.Expression);
            Assert.IsNotNull(variable.Evaluate(AdminQuery));

            var value = ((SqlNumber) variable.Evaluate(AdminQuery).Value).ToDouble();
            Assert.AreEqual(7689, value);
        }