XmlFunctionsTest.cs

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using System;
using System.Text;

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

using NUnit.Framework;

namespace Deveel.Data.Xml {
    [TestFixture]
    public class XmlFunctionsTest : ContextBasedTest {
        protected override void RegisterServices(ServiceContainer container) {
            container.UseXml();
        }

        private DataObject ParseAndInvoke(string text) {
            var exp = SqlExpression.Parse(text);
            Assert.IsInstanceOf<SqlFunctionCallExpression>(exp);

            var functionName = ((SqlFunctionCallExpression)exp).FunctioName;
            var args = ((SqlFunctionCallExpression)exp).Arguments;
            var invoke = new Invoke(functionName, args);

            return Query.InvokeFunction(invoke);
        }

        [Test]
        public void ToXmlType() {
            const string text = "TO_XML('<root>value</root>')";

            var result = ParseAndInvoke(text);

            Assert.IsNotNull(result);
            Assert.IsInstanceOf<XmlNodeType>(result.Type);
            Assert.IsFalse(result.IsNull);
        }

        [Test]
        public void ExtractXml() {
            const string text = "EXTRACT(TO_XML('<root><child>value</child></root>'), '/root/child')";

            var result = ParseAndInvoke(text);

            Assert.IsNotNull(result);
            Assert.IsInstanceOf<XmlNodeType>(result.Type);
            Assert.IsFalse(result.IsNull);
        }

        [Test]
        public void ExtractValue() {
            const string text = "EXTRACTVALUE(TO_XML('<root><child>value</child></root>'), '/root/child/text()')";

            var result = ParseAndInvoke(text);

            Assert.IsNotNull(result);
            Assert.IsInstanceOf<StringType>(result.Type);
            Assert.IsFalse(result.IsNull);
        }

        [Test]
        public void UpdateText() {
            const string text = "UPDATEXML(TO_XML('<root><child>value</child></root>'), '/root/child/text()', 'value2')";

            var result = ParseAndInvoke(text);

            Assert.IsNotNull(result);
            Assert.IsInstanceOf<XmlNodeType>(result.Type);
            Assert.IsFalse(result.IsNull);

            /*
            TODO: must inspect why the text fails to compare...
            var xmlNode = (SqlXmlNode) result.Value;
            var updated = xmlNode.ToSqlString().Value;
            var expected = "<root><child>value2</child></root>";
            Assert.AreEqual(expected, updated);
            */
        }
    }
}