8343396: Use OperatingSystem, Architecture, and OSVersion in jpackage tests

Reviewed-by: rriggs, almatvee

Author: Alexey Semenyuk

test/jdk/tools/jpackage/helpers/jdk/jpackage/test/TKit.java

@@ -61,15 +61,14 @@
 import java.util.stream.Collectors;
 import static java.util.stream.Collectors.toSet;
 import java.util.stream.Stream;
+import jdk.internal.util.OperatingSystem;
 import jdk.jpackage.test.Functional.ExceptionBox;
 import jdk.jpackage.test.Functional.ThrowingConsumer;
 import jdk.jpackage.test.Functional.ThrowingRunnable;
 import jdk.jpackage.test.Functional.ThrowingSupplier;
 
 public final class TKit {
 
-    private static final String OS = System.getProperty("os.name").toLowerCase();
-
     public static final Path TEST_SRC_ROOT = Functional.identity(() -> {
         Path root = Path.of(System.getProperty("test.src"));
 
@@ -176,15 +175,15 @@ static String getCurrentDefaultAppName() {
     }
 
     public static boolean isWindows() {
-        return (OS.contains("win"));
+        return OperatingSystem.isWindows();
     }
 
     public static boolean isOSX() {
-        return (OS.contains("mac"));
+        return OperatingSystem.isMacOS();
     }
 
     public static boolean isLinux() {
-        return ((OS.contains("nix") || OS.contains("nux")));
+        return OperatingSystem.isLinux();
     }
 
     public static boolean isLinuxAPT() {

test/jdk/tools/jpackage/macosx/HostArchPkgTest.java

@@ -28,6 +28,7 @@
 import javax.xml.xpath.XPath;
 import javax.xml.xpath.XPathConstants;
 import javax.xml.xpath.XPathFactory;
+import jdk.internal.util.Architecture;
 import jdk.jpackage.test.JPackageCommand;
 import jdk.jpackage.test.PackageTest;
 import jdk.jpackage.test.PackageType;
@@ -73,7 +74,7 @@ private static void verifyHostArch(JPackageCommand cmd) throws Exception {
                     "/installer-gui-script/options/@hostArchitectures",
                     doc, XPathConstants.STRING);
 
-        if ("aarch64".equals(System.getProperty("os.arch"))) {
+        if (Architecture.isAARCH64()) {
             TKit.assertEquals(v, "arm64",
                     "Check value of \"hostArchitectures\" attribute");
         } else {