8353489: Increase timeout and improve Windows compatibility in test/jdk/java/lang/ProcessBuilder/Basic.java

Reviewed-by: rrich
Backport-of: 6bcbc3b0a21687504b07a0a405d824a448aea872

Author: GoeLin

test/jdk/java/lang/ProcessBuilder/Basic.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2003, 2023, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2003, 2025, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -36,8 +36,8 @@
  * @requires !vm.musl
  * @requires vm.flagless
  * @library /test/lib
- * @run main/othervm/native/timeout=300 -Djava.security.manager=allow Basic
- * @run main/othervm/native/timeout=300 -Djava.security.manager=allow -Djdk.lang.Process.launchMechanism=fork Basic
+ * @run main/othervm/native/timeout=360 -Djava.security.manager=allow Basic
+ * @run main/othervm/native/timeout=360 -Djava.security.manager=allow -Djdk.lang.Process.launchMechanism=fork Basic
  * @author Martin Buchholz
  */
 
@@ -209,7 +209,7 @@ private static void compareLinesIgnoreCase(String lines1, String lines2) {
 
     private static final Runtime runtime = Runtime.getRuntime();
 
-    private static final String[] winEnvCommand = {"cmd.exe", "/c", "set"};
+    private static final String[] winEnvCommand = {"cmd.exe", "/d", "/c", "set"};
 
     private static String winEnvFilter(String env) {
         return env.replaceAll("\r", "")
@@ -1914,7 +1914,9 @@ public void doIt(Map<String,String> environ) {
         // Test Runtime.exec(...envp...) with envstrings without any `='
         //----------------------------------------------------------------
         try {
-            String[] cmdp = {"echo"};
+            // In Windows CMD (`cmd.exe`), `echo/` outputs a newline (i.e., an empty line).
+            // Wrapping it with `cmd.exe /c` ensures compatibility in both native Windows and Cygwin environments.
+            String[] cmdp = Windows.is() ? new String[]{"cmd.exe", "/c", "echo/"} : new String[]{"echo"};
             String[] envp = {"Hello", "World"}; // Yuck!
             Process p = Runtime.getRuntime().exec(cmdp, envp);
             equal(commandOutput(p), "\n");