Examples of java.lang.invoke.MethodHandle.type()

java.lang.invoke.MethodHandle.type()
Reports the type of this method handle. Every invocation of this method handle via {@code invokeExact} must exactly match this type. @return the method handle type

        MethodHandle handle = SmartBinder
                .from(String.class, new String[]{"arg1", "arg2"}, String.class, String.class)
                .filter("arg.*", filter)
                .invoke(target).handle();


        assertEquals(MethodType.methodType(String.class, String.class, String.class), handle.type());
        assertEquals("foogoodbyebargoodbye", (String)handle.invokeExact("foo", "bar"));
    }


    @Test
    public void testIdentity() throws Throwable {

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                .fold("s", stringInt)
                .dropLast()
                .identity()
                .handle();


        assertEquals(MethodType.methodType(String.class, int.class), handle.type());
        assertEquals("15", (String)handle.invokeExact(15));
    }
    
    private static final MethodHandles.Lookup LOOKUP = MethodHandles.lookup();

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        MethodHandle handle = Binder
                .from(binder1)
                .insert(1, "world")
                .invoke(target);


        assertEquals(MethodType.methodType(String.class, String.class, Object.class), handle.type());
        assertEquals("Hello, world", (String) handle.invokeExact("Hello, ", new Object()));
    }


    @Test
    public void testInsertPrimitive() throws Throwable {

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        MethodHandle handle = Binder
                .from(String.class)
                .insert(0, new Class[]{int.class, long.class}, 1, 1L)
                .invoke(target);


        assertEquals(MethodType.methodType(String.class), handle.type());
        assertEquals("intLong ok", (String) handle.invokeExact());
    }


    @Test
    public void testTo() throws Throwable {

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        MethodHandle handle = Binder
                .from(String.class, String.class)
                .insert(1, "world")
                .invoke(target);


        assertEquals(MethodType.methodType(String.class, String.class), handle.type());
        assertEquals("Hello, world", (String) handle.invokeExact("Hello, "));


        MethodHandle target2 = Subjects.concatCharSequenceHandle();
        MethodHandle handle2 = Binder
                .from(String.class, String.class)

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        MethodHandle handle2 = Binder
                .from(String.class, String.class)
                .insert(1, CharSequence.class, "world")
                .invoke(target2);


        assertEquals(MethodType.methodType(String.class, String.class), handle2.type());
        assertEquals("Hello, world", (String) handle2.invokeExact("Hello, "));
    }


    @Test
    public void testAppend() throws Throwable {

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                .from(String.class, String.class, Object.class)
                .append("world")
                .drop(1)
                .invoke(target);


        assertEquals(MethodType.methodType(String.class, String.class, Object.class), handle.type());
        assertEquals("Hello, world", (String) handle.invokeExact("Hello, ", new Object()));


        MethodHandle target2 = Subjects.concatCharSequenceHandle();
        MethodHandle handle2 = Binder
                .from(String.class, String.class, Object.class)

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                .from(String.class, String.class, Object.class)
                .append(CharSequence.class, "world")
                .drop(1)
                .invoke(target2);


        assertEquals(MethodType.methodType(String.class, String.class, Object.class), handle2.type());
        assertEquals("Hello, world", (String) handle2.invokeExact("Hello, ", new Object()));
    }


    @Test
    public void testPrepend() throws Throwable {

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                .from(String.class, Object.class, String.class)
                .prepend("Hello, ")
                .drop(1)
                .invoke(target);


        assertEquals(MethodType.methodType(String.class, Object.class, String.class), handle.type());
        assertEquals("Hello, world", (String) handle.invokeExact(new Object(), "world"));


        MethodHandle target2 = Subjects.concatHandle();
        MethodHandle handle2 = Binder
                .from(String.class, Object.class, String.class)

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                .from(String.class, Object.class, String.class)
                .prepend(String.class, "Hello, ")
                .drop(1)
                .invoke(target2);


        assertEquals(MethodType.methodType(String.class, Object.class, String.class), handle2.type());
        assertEquals("Hello, world", (String) handle2.invokeExact(new Object(), "world"));
    }


    @Test
    public void testDropInsert() throws Throwable {

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