mfgames-cil/tests/MfGames.Nitride.Yaml.Tests/ParseYamlHeaderTests.cs

using System.Collections.Generic;
using System.Linq;

using MfGames.Gallium;
using MfGames.Nitride.Contents;
using MfGames.Nitride.Tests;

using Xunit;
using Xunit.Abstractions;

// ReSharper disable UnusedAutoPropertyAccessor.Local

namespace MfGames.Nitride.Yaml.Tests;

public class ParseYamlHeaderTests : NitrideTestBase
{
	public ParseYamlHeaderTests(ITestOutputHelper output)
		: base(output)
	{
	}

	[Fact]
	public void ParseNoContent()
	{
		var input = new List<Entity>
		{
			new Entity()
				.SetTextContent(
					new StringTextContent(
						"---",
						"title: Test Title 1",
						"---")),
		};

		var op = new ParseYamlHeader<TestHeader>();

		Entity output = input.Run(op)
			.First();

		Assert.True(output.Has<ITextContent>());

		Assert.Equal(
			new[]
			{
				string.Empty,
			},
			output
				.Get<ITextContent>()
				.GetTextContentString()
				.Split("\n"));

		Assert.True(output.Has<TestHeader>());

		Assert.Equal(
			"Test Title 1",
			output.Get<TestHeader>().Title);
	}

	[Fact]
	public void ParseNoHeader()
	{
		var input = new List<Entity>
		{
			new Entity().SetTextContent(new StringTextContent("Hello"))
		};

		var op = new ParseYamlHeader<TestHeader>();

		Entity output = input.Run(op)
			.First();

		Assert.True(output.Has<ITextContent>());

		Assert.Equal(
			new[]
			{
				"Hello",
				string.Empty,
			},
			output.Get<ITextContent>()
				.GetTextContentString()
				.Split("\n"));

		Assert.True(output.Has<TestHeader>());

		Assert.Null(
			output.Get<TestHeader>()
				.Title);
	}

	[Fact]
	public void ParseSimpleHeader()
	{
		var input = new List<Entity>
		{
			new Entity().SetTextContent(
				new StringTextContent(
					"---",
					"title: Test Title 1",
					"---",
					"Hello"))
		};

		var op = new ParseYamlHeader<TestHeader>();

		Entity output = input.Run(op)
			.First();

		Assert.True(output.Has<ITextContent>());

		Assert.Equal(
			new[]
			{
				"Hello",
				string.Empty,
			},
			output.Get<ITextContent>()
				.GetTextContentString()
				.Split("\n"));

		Assert.True(output.Has<TestHeader>());

		Assert.Equal(
			"Test Title 1",
			output.Get<TestHeader>()
				.Title);
	}

	private class TestHeader
	{
		public string? Title { get; set; }
	}
}