mfgames-cil/tests/MfGames.Nitride.Markdown.Tests/ExtractMarkdownHeading1Tests.cs

using System.Collections.Generic;
using System.Linq;
using MfGames.Gallium;
using MfGames.Nitride.Contents;
using MfGames.TestSetup;
using Xunit;
using Xunit.Abstractions;

namespace MfGames.Nitride.Markdown.Tests;

/// <summary>
/// Tests the functionality of the ParseMarkdownHeadingOne operation.
/// </summary>
public class ExtractMarkdownHeading1Tests : TestBase<MarkdownTestContext>
{
    public ExtractMarkdownHeading1Tests(ITestOutputHelper output)
        : base(output) { }

    [Fact]
    public void ParseComplexHeader()
    {
        using MarkdownTestContext context = this.CreateContext();

        List<Entity> input =
            new()
            {
                new Entity()
                    .Set(IsMarkdown.Instance)
                    .SetTextContent("# Heading [One](/test)\n\nContent\nsecond\n\nline"),
            };

        ExtractMarkdownHeading1 op = context
            .Resolve<ExtractMarkdownHeading1>()
            .WithAddModelCallback((entity, heading) => entity.Set(heading));

        IEnumerable<Entity> output = op.Run(input);
        Entity first = output.First();
        string content = first.GetTextContentString()!.Trim();

        Assert.Equal("Content\nsecond\n\nline", content);
        Assert.Equal("Heading [One](/test)", first.Get<string>());
    }

    [Fact]
    public void ParseEmptyHeader()
    {
        using MarkdownTestContext context = this.CreateContext();

        List<Entity> input =
            new() { new Entity().Set(IsMarkdown.Instance).SetTextContent("#\nContent"), };

        ExtractMarkdownHeading1 op = context
            .Resolve<ExtractMarkdownHeading1>()
            .WithAddModelCallback((entity, heading) => entity.Set(heading));

        IEnumerable<Entity> output = op.Run(input);
        Entity first = output.First();
        string content = first.GetTextContentString()!.Trim();

        Assert.Equal("Content", content);
        Assert.Equal("", first.Get<string>());
    }

    [Fact]
    public void ParseHeaderTwo()
    {
        using MarkdownTestContext context = this.CreateContext();

        List<Entity> input =
            new()
            {
                new Entity().Set(IsMarkdown.Instance).SetTextContent("## Heading Two\nContent"),
            };

        ExtractMarkdownHeading1 op = context
            .Resolve<ExtractMarkdownHeading1>()
            .WithAddModelCallback((entity, heading) => entity.Set(heading));

        IEnumerable<Entity> output = op.Run(input);
        Entity first = output.First();
        string content = first.GetTextContentString()!.Trim();

        Assert.Equal("## Heading Two\nContent", content);
        Assert.False(first.Has<string>());
    }

    [Fact]
    public void ParseMultipleHeaderOne()
    {
        using MarkdownTestContext context = this.CreateContext();

        List<Entity> input =
            new()
            {
                new Entity()
                    .Set(IsMarkdown.Instance)
                    .SetTextContent("# Heading One\n\n# Heading Two\n Content"),
            };

        ExtractMarkdownHeading1 op = context
            .Resolve<ExtractMarkdownHeading1>()
            .WithAddModelCallback((entity, heading) => entity.Set(heading));

        IEnumerable<Entity> output = op.Run(input);
        Entity first = output.First();
        string content = first.GetTextContentString()!.Trim();

        Assert.Equal("# Heading Two\n Content", content);
        Assert.Equal("Heading One", first.Get<string>());
    }

    [Fact]
    public void ParseNoHeader()
    {
        using MarkdownTestContext context = this.CreateContext();

        List<Entity> input =
            new() { new Entity().Set(IsMarkdown.Instance).SetTextContent("Content"), };

        ExtractMarkdownHeading1 op = context
            .Resolve<ExtractMarkdownHeading1>()
            .WithAddModelCallback((entity, heading) => entity.Set(heading));

        IEnumerable<Entity> output = op.Run(input);
        Entity first = output.First();
        string content = first.GetTextContentString()!.Trim();

        Assert.Equal("Content", content);
        Assert.False(first.Has<string>());
    }

    [Fact]
    public void ParseSimpleHeader()
    {
        using MarkdownTestContext context = this.CreateContext();

        List<Entity> input =
            new()
            {
                new Entity().Set(IsMarkdown.Instance).SetTextContent("# Heading One\n\nContent"),
            };

        ExtractMarkdownHeading1 op = context
            .Resolve<ExtractMarkdownHeading1>()
            .WithAddModelCallback((entity, heading) => entity.Set(heading));

        IEnumerable<Entity> output = op.Run(input);
        Entity first = output.First();
        string content = first.GetTextContentString()!.Trim();

        Assert.Equal("Content", content);
        Assert.Equal("Heading One", first.Get<string>());
    }
}