fix: re-add advanced path operations (#684)

Fixes #682

Author: fgreinacher

Directory.Build.props

@@ -11,7 +11,7 @@
     <PackageTags>testing</PackageTags>
     <PackageProjectUrl>https://github.com/System-IO-Abstractions/System.IO.Abstractions</PackageProjectUrl>
     <PackageLicenseExpression>MIT</PackageLicenseExpression>
-    <DefineConstants Condition="'$(TargetFramework)' == 'net5.0' OR '$(TargetFramework)' == 'netcoreapp3.1' OR '$(TargetFramework)' == 'netstandard2.1'">$(DefineConstants);FEATURE_ASYNC_FILE;FEATURE_ENUMERATION_OPTIONS;FEATURE_ADVANCED_PATH_OPERATIONSFEATURE_PATH_JOIN_WITH_SPAN</DefineConstants>
+    <DefineConstants Condition="'$(TargetFramework)' == 'net5.0' OR '$(TargetFramework)' == 'netcoreapp3.1' OR '$(TargetFramework)' == 'netstandard2.1'">$(DefineConstants);FEATURE_ASYNC_FILE;FEATURE_ENUMERATION_OPTIONS;FEATURE_ADVANCED_PATH_OPERATIONS;FEATURE_PATH_JOIN_WITH_SPAN</DefineConstants>
     <DefineConstants Condition="'$(TargetFramework)' == 'net5.0'">$(DefineConstants);FEATURE_FILE_MOVE_WITH_OVERWRITE</DefineConstants>
     <DefineConstants Condition="'$(TargetFramework)' == 'net5.0'">$(DefineConstants);FEATURE_SUPPORTED_OS_ATTRIBUTE</DefineConstants>
     <DefineConstants Condition="'$(TargetFramework)' == 'net5.0'">$(DefineConstants);FEATURE_FILE_SYSTEM_WATCHER_FILTERS</DefineConstants>

tests/System.IO.Abstractions.Tests/__snapshots__/ApiParityTests.Path_.NET 5.0.snap

@@ -11,20 +11,13 @@
     "Boolean EndsInDirectorySeparator(System.String)",
     "Boolean HasExtension(System.ReadOnlySpan`1[System.Char])",
     "Boolean IsPathFullyQualified(System.ReadOnlySpan`1[System.Char])",
-    "Boolean IsPathFullyQualified(System.String)",
     "Boolean IsPathRooted(System.ReadOnlySpan`1[System.Char])",
-    "Boolean TryJoin(System.ReadOnlySpan`1[System.Char], System.ReadOnlySpan`1[System.Char], System.ReadOnlySpan`1[System.Char], System.Span`1[System.Char], Int32 ByRef)",
-    "Boolean TryJoin(System.ReadOnlySpan`1[System.Char], System.ReadOnlySpan`1[System.Char], System.Span`1[System.Char], Int32 ByRef)",
     "System.ReadOnlySpan`1[System.Char] GetDirectoryName(System.ReadOnlySpan`1[System.Char])",
     "System.ReadOnlySpan`1[System.Char] GetExtension(System.ReadOnlySpan`1[System.Char])",
     "System.ReadOnlySpan`1[System.Char] GetFileName(System.ReadOnlySpan`1[System.Char])",
     "System.ReadOnlySpan`1[System.Char] GetFileNameWithoutExtension(System.ReadOnlySpan`1[System.Char])",
     "System.ReadOnlySpan`1[System.Char] GetPathRoot(System.ReadOnlySpan`1[System.Char])",
     "System.ReadOnlySpan`1[System.Char] TrimEndingDirectorySeparator(System.ReadOnlySpan`1[System.Char])",
-    "System.String GetFullPath(System.String, System.String)",
-    "System.String GetRelativePath(System.String, System.String)",
-    "System.String Join(System.ReadOnlySpan`1[System.Char], System.ReadOnlySpan`1[System.Char])",
-    "System.String Join(System.ReadOnlySpan`1[System.Char], System.ReadOnlySpan`1[System.Char], System.ReadOnlySpan`1[System.Char])",
     "System.String Join(System.ReadOnlySpan`1[System.Char], System.ReadOnlySpan`1[System.Char], System.ReadOnlySpan`1[System.Char], System.ReadOnlySpan`1[System.Char])",
     "System.String Join(System.String, System.String)",
     "System.String Join(System.String, System.String, System.String)",

tests/System.IO.Abstractions.Tests/__snapshots__/ApiParityTests.Path_.NET Core 3.1.snap

@@ -11,20 +11,13 @@
     "Boolean EndsInDirectorySeparator(System.String)",
     "Boolean HasExtension(System.ReadOnlySpan`1[System.Char])",
     "Boolean IsPathFullyQualified(System.ReadOnlySpan`1[System.Char])",
-    "Boolean IsPathFullyQualified(System.String)",
     "Boolean IsPathRooted(System.ReadOnlySpan`1[System.Char])",
-    "Boolean TryJoin(System.ReadOnlySpan`1[System.Char], System.ReadOnlySpan`1[System.Char], System.ReadOnlySpan`1[System.Char], System.Span`1[System.Char], Int32 ByRef)",
-    "Boolean TryJoin(System.ReadOnlySpan`1[System.Char], System.ReadOnlySpan`1[System.Char], System.Span`1[System.Char], Int32 ByRef)",
     "System.ReadOnlySpan`1[System.Char] GetDirectoryName(System.ReadOnlySpan`1[System.Char])",
     "System.ReadOnlySpan`1[System.Char] GetExtension(System.ReadOnlySpan`1[System.Char])",
     "System.ReadOnlySpan`1[System.Char] GetFileName(System.ReadOnlySpan`1[System.Char])",
     "System.ReadOnlySpan`1[System.Char] GetFileNameWithoutExtension(System.ReadOnlySpan`1[System.Char])",
     "System.ReadOnlySpan`1[System.Char] GetPathRoot(System.ReadOnlySpan`1[System.Char])",
     "System.ReadOnlySpan`1[System.Char] TrimEndingDirectorySeparator(System.ReadOnlySpan`1[System.Char])",
-    "System.String GetFullPath(System.String, System.String)",
-    "System.String GetRelativePath(System.String, System.String)",
-    "System.String Join(System.ReadOnlySpan`1[System.Char], System.ReadOnlySpan`1[System.Char])",
-    "System.String Join(System.ReadOnlySpan`1[System.Char], System.ReadOnlySpan`1[System.Char], System.ReadOnlySpan`1[System.Char])",
     "System.String Join(System.ReadOnlySpan`1[System.Char], System.ReadOnlySpan`1[System.Char], System.ReadOnlySpan`1[System.Char], System.ReadOnlySpan`1[System.Char])",
     "System.String Join(System.String, System.String)",
     "System.String Join(System.String, System.String, System.String)",