test/tools/jmod/JmodNegativeTest.java

rev 16200 : 8166568: jmod tool needs extract option
8169492: jdk.internal.jmod.JmodFile.JMOD_MAGIC_NUMBER is a mutable array
Reviewed-by:

*** 80,99 ****
      @Test
      public void testNoArgs() {
          jmod()
              .assertFailure()
              .resultChecker(r ->
!                 assertContains(r.output, "Error: one of create, list, describe, or hash must be specified")
              );
      }
  
      @Test
      public void testBadAction() {
          jmod("badAction")
              .assertFailure()
              .resultChecker(r ->
!                 assertContains(r.output, "Error: mode must be one of create, list, describe, or hash")
              );
  
          jmod("--badOption")
              .assertFailure()
              .resultChecker(r ->
--- 80,99 ----
      @Test
      public void testNoArgs() {
          jmod()
              .assertFailure()
              .resultChecker(r ->
!                 assertContains(r.output, "Error: one of create, extract, list, describe, or hash must be specified")
              );
      }
  
      @Test
      public void testBadAction() {
          jmod("badAction")
              .assertFailure()
              .resultChecker(r ->
!                 assertContains(r.output, "Error: mode must be one of create, extract, list, describe, or hash")
              );
  
          jmod("--badOption")
              .assertFailure()
              .resultChecker(r ->