// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
 
using Microsoft.AspNetCore.Razor.Language.Intermediate;
using Xunit;
 
namespace Microsoft.AspNetCore.Razor.Language.CodeGeneration;
 
public class LiteralRuntimeNodeWriterTest
{
    [Fact]
    public void WriteCSharpExpression_UsesWriteLiteral_WritesLinePragma_WithSource()
    {
        // Arrange
        var writer = LiteralRuntimeNodeWriter.Instance;
        using var context = TestCodeRenderingContext.CreateRuntime();
 
        var node = new CSharpExpressionIntermediateNode();
        var builder = IntermediateNodeBuilder.Create(node);
        builder.Add(IntermediateNodeFactory.CSharpToken("i++", new SourceSpan("test.cshtml", 0, 0, 0, 3, 0, 3)));
 
        // Act
        writer.WriteCSharpExpression(context, node);
 
        // Assert
        var csharp = context.CodeWriter.GetText().ToString();
        Assert.Equal(
@"
#nullable restore
#line (1,1)-(1,4) 13 ""test.cshtml""
WriteLiteral(i++
 
#line default
#line hidden
#nullable disable
);
",
            csharp,
            ignoreLineEndingDifferences: true);
    }
 
    [Fact]
    public void WriteCSharpExpression_WithMultipleChildren()
    {
        // Arrange
        var writer = LiteralRuntimeNodeWriter.Instance;
        using var context = TestCodeRenderingContext.CreateRuntime();
 
        var node = new CSharpExpressionIntermediateNode();
        var builder = IntermediateNodeBuilder.Create(node);
        builder.Add(IntermediateNodeFactory.CSharpToken("i++;", new SourceSpan("test.cshtml", 0, 0, 0, 4, 0, 4)));
        builder.Add(IntermediateNodeFactory.CSharpToken("j++;", new SourceSpan("test.cshtml", 5, 0, 5, 4, 0, 9)));
        builder.Add(IntermediateNodeFactory.CSharpToken("k++;", new SourceSpan("test.cshtml", 10, 0, 10, 4, 0, 14)));
 
        // Act
        writer.WriteCSharpExpression(context, node);
 
        // Assert
        var csharp = context.CodeWriter.GetText().ToString();
        Assert.Equal(
@"
#nullable restore
#line (1,1)-(1,5) 13 ""test.cshtml""
WriteLiteral(i++;
 
#line default
#line hidden
#nullable disable
#nullable restore
#line (1,6)-(1,10) ""test.cshtml""
j++;
 
#line default
#line hidden
#nullable disable
#nullable restore
#line (1,11)-(1,15) ""test.cshtml""
k++;
 
#line default
#line hidden
#nullable disable
);
",
            csharp,
            ignoreLineEndingDifferences: true);
    }
}