TestNameConvention.java

  @Test
  public void testPrefix() throws IOException {
    ClassPath cp = ClassPath.from(ClassLoader.getSystemClassLoader());
    Set<ClassPath.ClassInfo> classes = cp.getAllClasses();

    int prefixed = 0;
    int unPrefixed = 0;

    for (ClassPath.ClassInfo classInfo : classes) {
      Class<?> clazz;
      if (!classInfo.getPackageName().startsWith("org.apache.beam")) {
        continue;
      }

      try {
        clazz = classInfo.load();
      } catch (NoClassDefFoundError e) {
        System.err.println(String.format("Failed to load class %s: %s", classInfo.getName(), e));
        continue;
      }
      for (Method method : clazz.getDeclaredMethods()) {
        if (method.isAnnotationPresent(Test.class)) {
          if (method.getName().startsWith("test")) {
            prefixed++;
          } else
            unPrefixed++;
        }
      }
    }

    System.out.println(String.format("Prefixed: %d, Unprefixed: %d", prefixed, unPrefixed));
  }