Fix System.IO.Compression test (#19509)

* Fix System.IO.Compression test

Author: safern

src/System.IO.Compression/tests/System.IO.Compression.Tests.csproj

@@ -27,6 +27,9 @@
     <Compile Include="$(CommonTestPath)\System\AssertExtensions.cs">
       <Link>Common\System\AssertExtensions.cs</Link>
     </Compile>
+    <Compile Include="$(CommonTestPath)\System\IO\PathFeatures.cs">
+      <Link>Common\System\IO\PathFeatures.cs</Link>
+    </Compile>
     <Compile Include="$(CommonTestPath)\System\IO\Compression\CRC.cs">
       <Link>Common\System\IO\Compression\CRC.cs</Link>
     </Compile>

src/System.IO.Compression/tests/ZipArchive/zip_ManualAndCompatibilityTests.cs

@@ -9,6 +9,8 @@ namespace System.IO.Compression.Tests
 {
     public class zip_ManualAndCompatabilityTests : ZipFileTestBase
     {
+        public static bool IsUsingNewPathNormalization => !PathFeatures.IsUsingLegacyPathNormalization();
+
         [Theory]
         [InlineData("7zip.zip", "normal", true, true)]
         [InlineData("windows.zip", "normalWithoutEmptyDir", false, true)]
@@ -45,7 +47,7 @@ public static async Task CompatibilityTestsMsFiles(string withTrailing, string w
         /// For example, the file "aa\bb\cc\dd" in a zip created on Unix should be one file "aa\bb\cc\dd" whereas the same file
         /// in a zip created on Windows should be interpreted as the file "dd" underneath three subdirectories.
         /// </summary>
-        [Theory]
+        [ConditionalTheory(nameof(IsUsingNewPathNormalization))]
         [InlineData("backslashes_FromUnix.zip", "aa\\bb\\cc\\dd")]
         [InlineData("backslashes_FromWindows.zip", "dd")]
         [InlineData("WindowsInvalid_FromUnix.zip", "aa<b>d")]