Bootstrap all tests with a yaml front matter unless already provided or the content is explicitly empty

Author: Mpdreamz

tests/Elastic.Markdown.Tests/Directives/DirectiveBaseTests.cs

@@ -59,7 +59,16 @@ protected DirectiveTest(ITestOutputHelper output, [LanguageInjection("markdown")
 		var logger = new TestLoggerFactory(output);
 		FileSystem = new MockFileSystem(new Dictionary<string, MockFileData>
 		{
-			{ "docs/source/index.md", new MockFileData(content) }
+			{ "docs/source/index.md", new MockFileData(string.IsNullOrEmpty(content) || content.StartsWith("---") ? content :
+				// language=markdown
+$"""
+---
+title: Test Document
+---
+
+{content}
+"""
+			)}
 		}, new MockFileSystemOptions
 		{
 			CurrentDirectory = Paths.Root.FullName

tests/Elastic.Markdown.Tests/Inline/AnchorLinkTests.cs

@@ -12,14 +12,14 @@ namespace Elastic.Markdown.Tests.Inline;
 
 public abstract class AnchorLinkTestBase(ITestOutputHelper output, [LanguageInjection("markdown")] string content)
 	: InlineTest<LinkInline>(output,
-		$"""
-		## Hello world
+$"""
+## Hello world
 
-		A paragraph
+A paragraph
 
-		{content}
+{content}
 
-		""")
+""")
 {
 	protected override void AddToFileSystem(MockFileSystem fileSystem)
 	{

tests/Elastic.Markdown.Tests/Inline/InlneBaseTests.cs

@@ -69,7 +69,16 @@ protected InlineTest(ITestOutputHelper output, [LanguageInjection("markdown")]st
 		var logger = new TestLoggerFactory(output);
 		FileSystem = new MockFileSystem(new Dictionary<string, MockFileData>
 		{
-			{ "docs/source/index.md", new MockFileData(content) }
+			{ "docs/source/index.md", new MockFileData(string.IsNullOrEmpty(content) || content.StartsWith("---") ? content :
+				// language=markdown
+$"""
+---
+title: Test Document
+---
+
+{content}
+"""
+			)}
 		}, new MockFileSystemOptions
 		{
 			CurrentDirectory = Paths.Root.FullName