}

  /**
   * Runs {@link #testConstructor} on every constructor in class {@code c} that has at least {@code
   * minimalVisibility}.
   */
  public void testConstructors(Class<?> c, Visibility minimalVisibility) {
    for (Constructor<?> constructor : c.getDeclaredConstructors()) {
      if (minimalVisibility.isVisible(constructor) && !isIgnored(constructor)) {
        testConstructor(constructor);
      }
    }
  }

  }

  /**
   * Runs {@link #testConstructor} on every constructor in class {@code c} that has at least {@code
   * minimalVisibility}.
   */
  public void testConstructors(Class<?> c, Visibility minimalVisibility) {
    for (Constructor<?> constructor : c.getDeclaredConstructors()) {
      if (minimalVisibility.isVisible(constructor) && !isIgnored(constructor)) {
        testConstructor(constructor);
      }
    }
  }

    }
    return methods.build();
  }

  private static String typeName(Class<?> type) {
    return type.isArray() ? typeName(type.getComponentType()) + "[]" : type.getName();
  }

  public void testConstructor() throws Exception {
    Invokable<A, A> invokable = A.constructor();
    assertTrue(invokable.isPublic());
    assertFalse(invokable.isPackagePrivate());
    assertFalse(invokable.isAbstract());

  public void testPrivateClass() {
    NullPointerTester tester = new NullPointerTester();
    for (Constructor<?> constructor :
        PrivateClassWithPrivateConstructor.class.getDeclaredConstructors()) {
      tester.testConstructor(constructor);
    }
  }

  private interface Foo<T> {
    void doSomething(T bar, Integer baz);
  }

  private static class StringFoo implements Foo<String> {

    @Override

          IllegalAccessException,
          InvocationTargetException,
          FactoryMethodReturnsNullException {
    if (!Modifier.isAbstract(cls.getModifiers())) {
      nullPointerTester.testConstructors(cls, visibility);
    }
    nullPointerTester.testStaticMethods(cls, visibility);
    if (hasInstanceMethodToTestNulls(cls, visibility)) {
      Object instance = instantiate(cls);
      if (instance != null) {