test/tools/jmod/JmodTest.java

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

*** 133,142 ****
--- 133,165 ----
                  assertContains(r.output, CLASSES_PREFIX + "jdk/test/foo/resources/foo.properties");
              });
      }
  
      @Test
+     public void testExtract() throws IOException {
+         Path cp = EXPLODED_DIR.resolve("foo").resolve("classes");
+         jmod("create",
+              "--class-path", cp.toString(),
+              MODS_DIR.resolve("fooExtract.jmod").toString())
+             .assertSuccess();
+ 
+         jmod("extract",
+              MODS_DIR.resolve("fooExtract.jmod").toString())
+             .assertSuccess()
+             .resultChecker(r -> {
+                 // module-info should exist, but jmod will have added its Packages attr.
+                 assertTrue(Files.exists(Paths.get("classes/module-info.class")));
+                 assertSameContent(cp.resolve("jdk/test/foo/Foo.class"),
+                                   Paths.get("classes/jdk/test/foo/Foo.class"));
+                 assertSameContent(cp.resolve("jdk/test/foo/internal/Message.class"),
+                                   Paths.get("classes/jdk/test/foo/internal/Message.class"));
+                 assertSameContent(cp.resolve("jdk/test/foo/resources/foo.properties"),
+                                   Paths.get("classes/jdk/test/foo/resources/foo.properties"));
+             });
+     }
+ 
+     @Test
      public void testMainClass() throws IOException {
          Path jmod = MODS_DIR.resolve("fooMainClass.jmod");
          FileUtils.deleteFileIfExistsWithRetry(jmod);
          String cp = EXPLODED_DIR.resolve("foo").resolve("classes").toString();
  
*** 530,539 ****
--- 553,572 ----
                  sb.append("\t" + s + "\n");
              assertTrue(false, "Jmod content check failed.\n" + sb.toString());
          }
      }
  
+     static void assertSameContent(Path p1, Path p2) {
+         try {
+             byte[] ba1 = Files.readAllBytes(p1);
+             byte[] ba2 = Files.readAllBytes(p2);
+             assertEquals(ba1, ba2);
+         } catch (IOException x) {
+             throw new UncheckedIOException(x);
+         }
+     }
+ 
      static JmodResult jmod(String... args) {
          ByteArrayOutputStream baos = new ByteArrayOutputStream();
          PrintStream ps = new PrintStream(baos);
          System.out.println("jmod " + Arrays.asList(args));
          int ec = JMOD_TOOL.run(ps, ps, args);