test/langtools/tools/javac/expswitch/ExpSwitchNestingTest.java

*** 73,92 ****
          if (!result.isSuccess()) {
              System.err.printf("Diagnostics: %s%nTemplate: %s%n", diags.errorKeys(), sourceFiles.stream().map(p -> p.snd).collect(toList()));
          }
      }
  
      private void program(String... constructs) {
          String s = "class C { static boolean cond = false; static int x = 0; void m() { # } }";
          for (String c : constructs)
              s = s.replace("#", c);
          addSourceFile("C.java", new StringTemplate(s));
      }
  
      private void assertOK(String... constructs) {
          reset();
!         addCompileOptions("--enable-preview", "-source", "12");
          program(constructs);
          try {
              compile();
          }
          catch (IOException e) {
--- 73,94 ----
          if (!result.isSuccess()) {
              System.err.printf("Diagnostics: %s%nTemplate: %s%n", diags.errorKeys(), sourceFiles.stream().map(p -> p.snd).collect(toList()));
          }
      }
  
+     private static String[] PREVIEW_OPTIONS = {"--enable-preview", "-source", "13"};
+ 
      private void program(String... constructs) {
          String s = "class C { static boolean cond = false; static int x = 0; void m() { # } }";
          for (String c : constructs)
              s = s.replace("#", c);
          addSourceFile("C.java", new StringTemplate(s));
      }
  
      private void assertOK(String... constructs) {
          reset();
!         addCompileOptions(PREVIEW_OPTIONS);
          program(constructs);
          try {
              compile();
          }
          catch (IOException e) {
*** 95,105 ****
          assertCompileSucceeded();
      }
  
      private void assertOKWithWarning(String warning, String... constructs) {
          reset();
!         addCompileOptions("--enable-preview", "-source", "12");
          program(constructs);
          try {
              compile();
          }
          catch (IOException e) {
--- 97,107 ----
          assertCompileSucceeded();
      }
  
      private void assertOKWithWarning(String warning, String... constructs) {
          reset();
!         addCompileOptions(PREVIEW_OPTIONS);
          program(constructs);
          try {
              compile();
          }
          catch (IOException e) {
*** 108,118 ****
          assertCompileSucceededWithWarning(warning);
      }
  
      private void assertFail(String expectedDiag, String... constructs) {
          reset();
!         addCompileOptions("--enable-preview", "-source", "12");
          program(constructs);
          try {
              compile();
          }
          catch (IOException e) {
--- 110,120 ----
          assertCompileSucceededWithWarning(warning);
      }
  
      private void assertFail(String expectedDiag, String... constructs) {
          reset();
!         addCompileOptions(PREVIEW_OPTIONS);
          program(constructs);
          try {
              compile();
          }
          catch (IOException e) {