SystemFunctionTests.cs

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// 
//  Copyright 2010-2014 Deveel
// 
//    Licensed under the Apache License, Version 2.0 (the "License");
//    you may not use this file except in compliance with the License.
//    You may obtain a copy of the License at
// 
//        http://www.apache.org/licenses/LICENSE-2.0
// 
//    Unless required by applicable law or agreed to in writing, software
//    distributed under the License is distributed on an "AS IS" BASIS,
//    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
//    See the License for the specific language governing permissions and
//    limitations under the License.
using System;

using Deveel.Data;
using Deveel.Data.Sql;
using Deveel.Data.Sql.Expressions;
using Deveel.Data.Sql.Objects;
using Deveel.Data.Types;

using NUnit.Framework;

namespace Deveel.Data.Routines {
    [TestFixture]
    public class SystemFunctionTests : ContextBasedTest {
        private DataObject InvokeFunction(string name) {
            return Query.InvokeSystemFunction(name);
        }

        private DataObject InvokeFunction(string name, DataObject arg) {
            return Query.InvokeSystemFunction(name, SqlExpression.Constant(arg));
        }

        [Test]
        public void ResolveSystemFunctionWithNoSchema() {
            IFunction function = null;
            Assert.DoesNotThrow(() => function = Query.ResolveFunction(new ObjectName("user")));
            Assert.IsNotNull(function);
            Assert.AreEqual(SystemSchema.Name, function.FullName.ParentName);
            Assert.AreEqual("user", function.FullName.Name);
        }

        [Test]
        public void ResolveSystemFunctionFullyQualified() {
            IFunction function = null;
            Assert.DoesNotThrow(() => function = Query.ResolveFunction(ObjectName.Parse("SYSTEM.user")));
            Assert.IsNotNull(function);
            Assert.AreEqual(SystemSchema.Name, function.FullName.ParentName);
            Assert.AreEqual("user", function.FullName.Name);
        }

        [Test]
        public void InvokeUserFunction() {
            DataObject result = null;
            Assert.DoesNotThrow(() => result = InvokeFunction("user"));
            Assert.IsNotNull(result);
            Assert.AreEqual(AdminUserName, result.Value.ToString());
        }

        [Test]
        public void InvokeIntegerToString() {
            var value = DataObject.Integer(455366);
            DataObject result = null;
            Assert.DoesNotThrow(() => result = InvokeFunction("TOSTRING", value));
            Assert.IsNotNull(result);
            Assert.IsInstanceOf<StringType>(result.Type);

            var stringResult = result.Value.ToString();
            Assert.AreEqual("455366", stringResult);
        }

        [Test]
        public void InvokeDateToString() {
            var value = DataObject.Date(new SqlDateTime(2015, 02, 10));
            DataObject result = null;
            Assert.DoesNotThrow(() => result = InvokeFunction("TOSTRING", value));
            Assert.IsNotNull(result);
            Assert.IsInstanceOf<StringType>(result.Type);

            var stringResult = result.Value.ToString();
            Assert.AreEqual("2015-02-10", stringResult);
        }

        [Test]
        public void InvokeTimeStampToString_NoFormat() {
            var value = DataObject.TimeStamp(new SqlDateTime(2015, 02, 10, 17, 15, 01,00));
            DataObject result = null;
            Assert.DoesNotThrow(() => result = InvokeFunction("TOSTRING", value));
            Assert.IsNotNull(result);
            Assert.IsInstanceOf<StringType>(result.Type);

            var stringResult = result.Value.ToString();
            Assert.AreEqual("2015-02-10T17:15:01.000 +00:00", stringResult);
        }
    }
}