@Test
  public void check_varags_only() throws Throwable {
    CallSite concat =
        MethodInvocationSupport.bootstrap(
            lookup(),
            "defaultConcat",
            methodType(Object.class, Object.class, Object.class, Object.class, Object.class),
            0);
    VarargsChecking receiver = varargsChecking();

    Object result = concat.dynamicInvoker().invokeWithArguments(receiver, "a", "b", "c");
    assertThat(result, notNullValue());
    assertThat(result, instanceOf(String.class));
    assertThat((String) result, is("a-b-c"));

    concat =
        MethodInvocationSupport.bootstrap(
            lookup(), "defaultConcat", methodType(Object.class, Object.class, Object.class), 0);
    result = concat.dynamicInvoker().invokeWithArguments(receiver, new String[] {"a", "b", "c"});
    assertThat(result, notNullValue());
    assertThat(result, instanceOf(String.class));
    assertThat((String) result, is("a-b-c"));

    concat =
        MethodInvocationSupport.bootstrap(
            lookup(), "defaultConcat", methodType(Object.class, Object.class, Object.class), 0);
    receiver = varargsChecking();
    assertThat((String) concat.dynamicInvoker().invokeWithArguments(receiver, "a"), is("a"));

    concat =
        MethodInvocationSupport.bootstrap(
            lookup(), "defaultConcat", methodType(Object.class, Object.class), 0);
    receiver = varargsChecking();
    assertThat((String) concat.dynamicInvoker().invokeWithArguments(receiver), is(""));
  }
 @Test(expectedExceptions = NoSuchMethodError.class)
 public void check_bogus() throws Throwable {
   CallSite bogus =
       MethodInvocationSupport.bootstrap(
           lookup(), "bogus", methodType(Object.class, Object.class), 0);
   bogus.dynamicInvoker().invokeWithArguments(julien());
 }
  @Test
  public void dynamic_object_smoke_tests() throws Throwable {
    DynamicObject a = new DynamicObject();
    DynamicObject b = new DynamicObject();
    CallSite plopper =
        MethodInvocationSupport.bootstrap(
            lookup(), "plop", methodType(Object.class, Object.class, Object.class), 1);
    MethodHandle invoker = plopper.dynamicInvoker();

    invoker.invoke(a, 1);
    assertThat(a.get("plop"), is((Object) 1));

    invoker.invoke(b, 1);
    assertThat(b.get("plop"), is((Object) 1));

    invoker.invoke(a, 10);
    assertThat(a.get("plop"), is((Object) 10));
    assertThat(b.get("plop"), is((Object) 1));

    assertThat(invoker.invoke(new Ploper(), 666), is((Object) "666"));

    b.undefine("plop");
    Object result = invoker.invoke(b, 1);
    assertThat(result, is((Object) b));
    assertThat(b.get("plop"), is((Object) 1));
  }
 @Test(expectedExceptions = NullPointerException.class)
 public void not_nullsafe_invocation() throws Throwable {
   CallSite toString =
       MethodInvocationSupport.bootstrap(
           lookup(), "toString", methodType(Object.class, Object.class), 0);
   toString.dynamicInvoker().invoke(null);
 }
 @Test
 public void check_set_name() throws Throwable {
   CallSite setName =
       MethodInvocationSupport.bootstrap(
           lookup(), "setName", methodType(Object.class, Object.class, Object.class), 0);
   Person julien = julien();
   setName.dynamicInvoker().invokeWithArguments(julien, "Julien Ponge");
   assertThat(julien.name, is("Julien Ponge"));
 }
 @Test
 public void check_boolean_property_style_getter() throws Throwable {
   CallSite isGoloCommitter =
       MethodInvocationSupport.bootstrap(
           lookup(), "goloCommitter", methodType(Object.class, Object.class), 0);
   Person julien = julien();
   boolean goloCommitter = (boolean) isGoloCommitter.dynamicInvoker().invokeWithArguments(julien);
   assertThat(goloCommitter, is(true));
 }
 @Test
 public void check_equals() throws Throwable {
   CallSite equals =
       MethodInvocationSupport.bootstrap(
           lookup(), "equals", methodType(Object.class, Object.class, Object.class), 0);
   Person julien = julien();
   Boolean result = (Boolean) equals.dynamicInvoker().invokeWithArguments(julien, julien);
   assertThat(result, is(true));
 }
 @Test
 public void check_field_read() throws Throwable {
   CallSite email =
       MethodInvocationSupport.bootstrap(
           lookup(), "email", methodType(Object.class, Object.class), 0);
   String result = (String) email.dynamicInvoker().invokeWithArguments(julien());
   assertThat(result, notNullValue());
   assertThat(result, is("*****@*****.**"));
 }
 @Test
 public void check_property_style_getter_on_computed_field() throws Throwable {
   CallSite isRockStar =
       MethodInvocationSupport.bootstrap(
           lookup(), "rockStar", methodType(Object.class, Object.class), 0);
   Person julien = julien();
   boolean rockstar = (boolean) isRockStar.dynamicInvoker().invoke(julien);
   assertThat(rockstar, is(true));
 }
 @Test
 public void check_property_style_getter() throws Throwable {
   CallSite getName =
       MethodInvocationSupport.bootstrap(
           lookup(), "name", methodType(Object.class, Object.class), 0);
   Person julien = julien();
   String name = (String) getName.dynamicInvoker().invokeWithArguments(julien);
   assertThat(name, is("Julien"));
 }
 @Test
 public void check_property_style_setter_with_return_value() throws Throwable {
   CallSite setScore =
       MethodInvocationSupport.bootstrap(
           lookup(), "score", methodType(Object.class, Object.class, Object.class), 0);
   Person julien = julien();
   int halfScore = (int) setScore.dynamicInvoker().invokeWithArguments(julien, 100);
   assertThat(julien.score, is(100));
   assertThat(halfScore, is(50));
 }
 @Test
 public void check_boolean_property_style_setter() throws Throwable {
   CallSite setGoloCommitter =
       MethodInvocationSupport.bootstrap(
           lookup(), "goloCommitter", methodType(Object.class, Object.class, Object.class), 0);
   Person julien = julien();
   Person instance = (Person) setGoloCommitter.dynamicInvoker().invokeWithArguments(julien, false);
   assertThat(julien.goloCommitter, is(false));
   assertThat(instance, is(julien));
 }
 @Test
 public void check_to_string() throws Throwable {
   CallSite toString =
       MethodInvocationSupport.bootstrap(
           lookup(), "toString", methodType(Object.class, Object.class), 0);
   String result = (String) toString.dynamicInvoker().invokeWithArguments(julien());
   assertThat(result, notNullValue());
   assertThat(
       result, is("Person{name='Julien', email='*****@*****.**', goloCommitter=true}"));
 }
 @Test(
     expectedExceptions = NoSuchMethodError.class,
     expectedExceptionsMessageRegExp = ".*Person::notAccessible.*")
 public void check_property_style_resolution_fail_when_no_getter_setter_found() throws Throwable {
   CallSite getNoAccessible =
       MethodInvocationSupport.bootstrap(
           lookup(), "notAccessible", methodType(Object.class, Object.class), 0);
   Person julien = julien();
   getNoAccessible.dynamicInvoker().invokeWithArguments(julien);
 }
  @Test
  public void check_field_setter() throws Throwable {
    CallSite property =
        MethodInvocationSupport.bootstrap(
            lookup(), "property", methodType(Object.class, Object.class, Object.class), 0);
    FieldAccessors receiver = new FieldAccessors();
    receiver.property = "undefined";

    property.dynamicInvoker().invokeWithArguments(receiver, "foo");
    assertThat((String) receiver.property, is("foo"));
  }
  @Test
  public void nullsafe_invocation() throws Throwable {
    CallSite toString =
        MethodInvocationSupport.bootstrap(
            lookup(), "toString", methodType(Object.class, Object.class), 1);

    MethodHandle invoker = toString.dynamicInvoker();
    assertThat(invoker.invoke(null), nullValue());
    assertThat((String) invoker.invoke("a"), is("a"));
    assertThat((String) invoker.invoke("b"), is("b"));
    assertThat(invoker.invoke(null), nullValue());
  }
  @Test
  public void check_primitive_argument_allowance() throws Throwable {
    List<String> list = Arrays.asList("a", "b", "c");
    CallSite get =
        MethodInvocationSupport.bootstrap(
            lookup(), "get", methodType(Object.class, Object.class, Object.class), 0);

    MethodHandle handle = get.dynamicInvoker();
    assertThat(((String) handle.invokeWithArguments(list, 0)), is("a"));
    assertThat(((String) handle.invokeWithArguments(list, 1)), is("b"));
    assertThat(((String) handle.invokeWithArguments(list, 2)), is("c"));
  }
  @Test
  public void check_field_getter() throws Throwable {
    CallSite property =
        MethodInvocationSupport.bootstrap(
            lookup(), "property", methodType(Object.class, Object.class), 0);
    FieldAccessors receiver = new FieldAccessors();
    receiver.property = "foo";

    Object result = property.dynamicInvoker().invokeWithArguments(receiver);
    assertThat(result, notNullValue());
    assertThat(result, instanceOf(String.class));
    assertThat((String) result, is("foo"));
  }
  @Test
  public void nullsafe_megamorphic_invocation() throws Throwable {
    CallSite toString =
        MethodInvocationSupport.bootstrap(
            lookup(), "toString", methodType(Object.class, Object.class), 1);
    MethodInvocationSupport.InlineCache pic = (MethodInvocationSupport.InlineCache) toString;
    pic.depth = MethodInvocationSupport.InlineCache.MEGAMORPHIC_THRESHOLD + 10;

    MethodHandle invoker = toString.dynamicInvoker();
    assertThat(invoker.invoke(null), nullValue());
    assertThat((String) invoker.invoke("a"), is("a"));
    assertThat((String) invoker.invoke(1), is("1"));
    assertThat((String) invoker.invoke(1L), is("1"));
    assertThat((String) invoker.invoke(Arrays.asList()), is("[]"));
    assertThat((String) invoker.invoke(new Object()), startsWith("java.lang.Object"));
    assertThat(invoker.invoke(null), nullValue());
  }
  @Test
  public void check_many_to_string() throws Throwable {
    CallSite toString =
        MethodInvocationSupport.bootstrap(
            lookup(), "toString", methodType(Object.class, Object.class), 0);
    MethodHandle toStringMH = toString.dynamicInvoker();

    for (int i = 0; i < 5; i++) {
      String result = (String) toStringMH.invokeWithArguments(julien());
      assertThat(
          result,
          is("Person{name='Julien', email='*****@*****.**', goloCommitter=true}"));

      result = (String) toStringMH.invokeWithArguments("foo");
      assertThat(result, is("foo"));

      result = (String) toStringMH.invokeWithArguments(666);
      assertThat(result, is("666"));

      result = (String) toStringMH.invokeWithArguments(666L);
      assertThat(result, is("666"));

      result = (String) toStringMH.invokeWithArguments("foo");
      assertThat(result, is("foo"));

      result = (String) toStringMH.invokeWithArguments(new BigInteger("1234"));
      assertThat(result, is("1234"));

      result =
          (String)
              toStringMH.invokeWithArguments(
                  new Object() {
                    @Override
                    public String toString() {
                      return "Damn";
                    }
                  });
      assertThat(result, is("Damn"));

      result =
          (String)
              toStringMH.invokeWithArguments(
                  new Object() {
                    @Override
                    public String toString() {
                      return "Plop";
                    }
                  });
      assertThat(result, is("Plop"));

      result =
          (String)
              toStringMH.invokeWithArguments(
                  new Object() {
                    @Override
                    public String toString() {
                      return "Hey!";
                    }
                  });
      assertThat(result, is("Hey!"));
    }
  }