CodeConverter/Tests/CSharp/ExpressionTests/XmlExpressionTests.cs at ddde13fddd774af65fa3fdb4f0eebdcb19ecd967 · icsharpcode/CodeConverter · GitHub

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using System.Threading.Tasks;
using ICSharpCode.CodeConverter.Tests.TestRunners;
using Xunit;

namespace ICSharpCode.CodeConverter.Tests.CSharp.ExpressionTests;

/// <summary>
/// See https://docs.microsoft.com/en-us/dotnet/visual-basic/programming-guide/language-features/xml/how-to-transform-xml-by-using-linq
/// </summary>
public class XmlExpressionTests : ConverterTestBase
{
    [Fact]
    public async Task NestedXmlEchoSimpleAsync()
    {
        await TestConversionVisualBasicToCSharpAsync(@"Class TestClass
    Private Sub TestMethod()
        Dim hello = ""Hello""
        dim x = <h1><%= hello %></h1>
    End Sub
End Class", @"using System.Xml.Linq;

internal partial class TestClass
{
    private void TestMethod()
    {
        string hello = ""Hello"";
        var x = new XElement(""h1"", hello);
    }
}");
    }

    [Fact]
    public async Task TwoLayerNestedXmlWithExpressionsAsync()
    {
        await TestConversionVisualBasicToCSharpAsync(@"Class TestClass
    Private Sub TestMethod()
        Dim var1 = 1
        Dim var2 = 2
        dim x = <h1><%= var1 %><%= var2 %><span><%= var2 %><%= var1 %></span></h1>
    End Sub
End Class", @"using System.Xml.Linq;

internal partial class TestClass
{
    private void TestMethod()
    {
        int var1 = 1;
        int var2 = 2;
        var x = new XElement(""h1"", var1, var2, new XElement(""span"", var2, var1));
    }
}");
    }

    [Fact]
    public async Task MultiLineXmlExpressionsAsync()
    {
        await TestConversionVisualBasicToCSharpAsync(@"Imports System.Linq

Class TestClass
    Private Sub TestMethod()
        Dim catalog =
          <?xml version=""1.0""?>
          <Catalog>
              <Book id=""bk101"">
                  <Author>Garghentini, Davide</Author>
                  <Title>XML Developer's Guide</Title>
                  <Price>44.95</Price>
                  <Description>
          An in-depth look at creating applications
          with <technology>XML</technology>. For
          <audience>beginners</audience> or
          <audience>advanced</audience> developers.
        </Description>
              </Book>
              <Book id=""bk331"">
                  <Author>Spencer, Phil</Author>
                  <Title>Developing Applications with Visual Basic .NET</Title>
                  <Price>45.95</Price>
                  <Description>
          Get the expert insights, practical code samples,
          and best practices you need
          to advance your expertise with <technology>Visual
          Basic .NET</technology>.
          Learn how to create faster, more reliable applications
          based on professional,
          pragmatic guidance by today's top <audience>developers</audience>.
        </Description>
              </Book>
          </Catalog>

        Dim htmlOutput =
          <html>
              <body>
                  <%= From book In catalog.<Catalog>.<Book>
                      Select <div>
                                 <h1><%= book.<Title>.Value %></h1>
                                 <h3><%= ""By "" & book.<Author>.Value %></h3>
                                 <h3><%= ""Price = "" & book.<Price>.Value %></h3>
                                 <h2>Description</h2>
                                 <%= TransformDescription(book.<Description>(0)) %>
                                 <hr/>
                             </div> %>
              </body>
          </html>
    End Sub

    Public Function TransformDescription(s As String) As String
        Return s
    End Function
End Class", @"using System.Linq;
using System.Xml.Linq;

internal partial class TestClass
{
    private void TestMethod()
    {
        var catalog = new XDocument(
new XElement(""Catalog"",
    new XElement(""Book"", new XAttribute(""id"", ""bk101""),
        new XElement(""Author"", ""Garghentini, Davide""),
        new XElement(""Title"", ""XML Developer's Guide""),
        new XElement(""Price"", ""44.95""),
        new XElement(""Description"", ""\n          An in-depth look at creating applications\n          with "", new XElement(""technology"", ""XML""), "". For\n          "", new XElement(""audience"", ""beginners""), "" or\n          "", new XElement(""audience"", ""advanced""), "" developers.\n        "")
    ),
    new XElement(""Book"", new XAttribute(""id"", ""bk331""),
        new XElement(""Author"", ""Spencer, Phil""),
        new XElement(""Title"", ""Developing Applications with Visual Basic .NET""),
        new XElement(""Price"", ""45.95""),
        new XElement(""Description"", ""\n          Get the expert insights, practical code samples,\n          and best practices you need\n          to advance your expertise with "", new XElement(""technology"", ""Visual\n          Basic .NET""), "".\n          Learn how to create faster, more reliable applications\n          based on professional,\n          pragmatic guidance by today's top "", new XElement(""audience"", ""developers""), "".\n        "")
    )
)

);
        var htmlOutput = new XElement(""html"",
                  new XElement(""body"", from book in catalog.Elements(""Catalog"").Elements(""Book"")
                                       select new XElement(""div"",
                                                  new XElement(""h1"", book.Elements(""Title"").Value),
                                                  new XElement(""h3"", ""By "" + book.Elements(""Author"").Value),
                                                  new XElement(""h3"", ""Price = "" + book.Elements(""Price"").Value),

                                                  new XElement(""h2"", ""Description""), TransformDescription((string)book.Elements(""Description"").ElementAtOrDefault(0)), new XElement(""hr"")
                                              )
              )
          );
    }

    public string TransformDescription(string s)
    {
        return s;
    }
}
1 target compilation errors:
CS1061: 'IEnumerable<XElement>' does not contain a definition for 'Value' and no accessible extension method 'Value' accepting a first argument of type 'IEnumerable<XElement>' could be found (are you missing a using directive or an assembly reference?)", incompatibleWithAutomatedCommentTesting: true /* auto-testing of comments doesn't work because it tries to put VB comments inside the xml literal */);
        //BUG: See compilation error
    }


    [Fact]
    public async Task AssignmentStatementWithXmlElementAsync()
    {
        await TestConversionVisualBasicToCSharpAsync(@"Class TestClass
    Private Sub TestMethod()
        Dim b = <someXmlTag></someXmlTag>
        Dim c = <someXmlTag><bla anAttribute=""itsValue"">tata</bla><someContent>tata</someContent></someXmlTag>
    End Sub
End Class", @"using System.Xml.Linq;

internal partial class TestClass
{
    private void TestMethod()
    {
        var b = new XElement(""someXmlTag"");
        var c = new XElement(""someXmlTag"", new XElement(""bla"", new XAttribute(""anAttribute"", ""itsValue""), ""tata""), new XElement(""someContent"", ""tata""));
    }
}");
    }

    [Fact]
    public async Task AssignmentStatementWithXmlElementAndEmbeddedExpressionAsync()
    {
        await TestConversionVisualBasicToCSharpAsync(@"Class TestClass
    Private Sub TestMethod()
        Const value1 = ""something""
        Dim xElement = <Elem1 Attr1=<%= value1 %> Attr2=<%= 100 %>></Elem1>
    End Sub
End Class", @"using System.Xml.Linq;

internal partial class TestClass
{
    private void TestMethod()
    {
        const string value1 = ""something"";
        var xElement = new XElement(""Elem1"", new XAttribute(""Attr1"", value1), new XAttribute(""Attr2"", 100));
    }
}");
    }

    [Fact]
    public async Task SelfClosingXmlTagAsync()
    {
        await TestConversionVisualBasicToCSharpAsync(@"Class TestClass
    Private Sub TestMethod()
        Dim xElement = <Elem1 Attr1=""something"" />
    End Sub
End Class", @"using System.Xml.Linq;

internal partial class TestClass
{
    private void TestMethod()
    {
        var xElement = new XElement(""Elem1"", new XAttribute(""Attr1"", ""something""));
    }
}");
    }


    [Fact]
    public async Task ConditionalMemberAccessAsync()
    {
        await TestConversionVisualBasicToCSharpAsync(@"Class TestClass
    Private Sub TestMethod()
        Dim xDocument = <Test></Test>
        Dim elements1 = xDocument.<Something>.SingleOrDefault()?.<SomethingElse>
    End Sub
End Class", @"using System.Linq;
using System.Xml.Linq;

internal partial class TestClass
{
    private void TestMethod()
    {
        var xDocument = new XElement(""Test"");
        var elements1 = xDocument.Elements(""Something"").SingleOrDefault()?.Elements(""SomethingElse"");
    }
}");

    }


    [Fact]
    public async Task NamespaceImportAsync()
    {
        await TestConversionVisualBasicToCSharpAsync(@"' Place Imports statements at the top of your program.
Imports <xmlns=""http://DefaultNamespace"">
Imports <xmlns:ns=""http://NewNamespace"">

Module Module1

  Sub Main()
    ' Create element by using the default global XML namespace.
    Dim inner = <innerElement/>

    ' Create element by using both the default global XML namespace and the namespace identified with the ""ns"" prefix.
    Dim outer = <ns:outer><ns:innerElement attr=""value""></ns:innerElement><siblingElement></siblingElement><%= inner %></ns:outer>

    ' Display element to see its final form.
    Console.WriteLine(outer)
  End Sub

End Module", @"using System;
using System.Xml.Linq;
using XmlImports = XmlImportsCodeToConvert;

internal static class XmlImportsCodeToConvert
{
    // Place Imports statements at the top of your program.
    internal static readonly XNamespace Default = ""http://DefaultNamespace"";
    internal static readonly XNamespace ns = ""http://NewNamespace"";
    private static readonly XAttribute[] namespaceAttributes = {
        new XAttribute(""xmlns"", Default.NamespaceName),
        new XAttribute(XNamespace.Xmlns + ""ns"", ns.NamespaceName)
    };

    internal static XElement Apply(XElement x)
    {
        foreach (var d in x.DescendantsAndSelf())
        {
            foreach (var n in namespaceAttributes)
            {
                var a = d.Attribute(n.Name);
                if (a != null && a.Value == n.Value)
                {
                    a.Remove();
                }
            }
        }
        x.Add(namespaceAttributes);
        return x;
    }

    internal static XDocument Apply(XDocument x)
    {
        Apply(x.Root);
        return x;
    }
}

internal static partial class Module1
{

    public static void Main()
    {
        // Create element by using the default global XML namespace.
        var inner = XmlImports.Apply(new XElement(XmlImports.Default + ""innerElement""));

        // Create element by using both the default global XML namespace and the namespace identified with the ""ns"" prefix.
        var outer = XmlImports.Apply(new XElement(XmlImports.ns + ""outer"", new XElement(XmlImports.ns + ""innerElement"", new XAttribute(""attr"", ""value"")), new XElement(XmlImports.Default + ""siblingElement""), inner));

        // Display element to see its final form.
        Console.WriteLine(outer);
    }

}");
    }

    [Fact]
    public async Task XmlBuiltinNamespaceAsync()
    {
        await TestConversionVisualBasicToCSharpAsync(@"Class TestClass
    Private Sub TestMethod()
        Dim xElement = <Name xml:lang=""de"">Beispiel</Name>
        Dim xElement2 = <Name xmlns:ns1=""http://www.example.com/namespace/1"">Beispiel</Name>
    End Sub
End Class", @"using System.Xml.Linq;

internal partial class TestClass
{
    private void TestMethod()
    {
        var xElement = new XElement(""Name"", new XAttribute(XNamespace.Xml + ""lang"", ""de""), ""Beispiel"");
        var xElement2 = new XElement(""Name"", new XAttribute(XNamespace.Xmlns + ""ns1"", ""http://www.example.com/namespace/1""), ""Beispiel"");
    }
}");

    }

    [Fact]
    public async Task XmlCDataAsync()
    {
        await TestConversionVisualBasicToCSharpAsync(@"Class TestClass
    Private Sub TestMethod()
       Dim processedHtml = <![CDATA[
<!DOCTYPE html PUBLIC ""-//W3C//DTD XHTML 1.0 Transitional//EN"" ""http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"">
<html xmlns=""http://www.w3.org/1999/xhtml"">
	<head>
		<meta http-equiv=""Content-Type"" content=""text/html; charset=utf-8"" /><title>
	</head>
	<body>
		<p class=""cs95E872D0""><span class=""cs9D249CCB"">&nbsp;Regards,</span></p>
    </body>
</html>
    ]]>.Value()
    End Sub
End Class", @"using System.Xml.Linq;

internal partial class TestClass
{
    private void TestMethod()
    {
        string processedHtml = new XCData(""\n<!DOCTYPE html PUBLIC \""-//W3C//DTD XHTML 1.0 Transitional//EN\"" \""http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd\"">\n<html xmlns=\""http://www.w3.org/1999/xhtml\"">\n\t<head>\n\t\t<meta http-equiv=\""Content-Type\"" content=\""text/html; charset=utf-8\"" /><title>\n\t</head>\n\t<body>\n\t\t<p class=\""cs95E872D0\""><span class=\""cs9D249CCB\"">&nbsp;Regards,</span></p>\n    </body>\n</html>\n    "").Value;
    }
}", incompatibleWithAutomatedCommentTesting: true);

    }
}