Issue #5870 - Updating Windows tests

+ Eliminating OS.MAC (as it doesn't support drive letters)
+ Adding alt URI syntax version as well

jetty-util/src/test/java/org/eclipse/jetty/util/resource/ResourceTest.java

@@ -43,8 +43,8 @@
 import static org.hamcrest.MatcherAssert.assertThat;
 import static org.hamcrest.Matchers.equalTo;
 import static org.hamcrest.Matchers.startsWith;
+import static org.junit.jupiter.api.Assertions.assertEquals;
 import static org.junit.jupiter.api.Assertions.assertNotNull;
-import static org.junit.jupiter.api.Assertions.assertTrue;
 
 public class ResourceTest
 {
@@ -299,17 +299,30 @@ public void testGlobPath() throws IOException
         Resource globResource = Resource.newResource(globReference);
         assertNotNull(globResource, "Should have produced a Resource");
     }
-
+
+    @Test
+    @EnabledOnOs(OS.WINDOWS)
+    public void testEqualsWindowsAltUriSyntax() throws Exception
+    {
+        URI a = new URI("file:/C:/foo/bar");
+        URI b = new URI("file:///C:/foo/bar");
+
+        Resource ra = Resource.newResource(a);
+        Resource rb = Resource.newResource(b);
+
+        assertEquals(rb, ra);
+    }
+
     @Test
-    @EnabledOnOs({OS.MAC, OS.WINDOWS}) 
-    public void testEquals() throws Exception
+    @EnabledOnOs(OS.WINDOWS)
+    public void testEqualsWindowsCaseInsensitiveDrive() throws Exception
     {
         URI a = new URI("file:///c:/foo/bar");
         URI b = new URI("file:///C:/foo/bar");
 
         Resource ra = Resource.newResource(a);
         Resource rb = Resource.newResource(b);
-        
-        assertTrue(ra.equals(rb));
+
+        assertEquals(rb, ra);
     }
 }