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

                .from(String.class, String.class, Object.class)
                .drop(1)
                .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 testDropLast() throws Throwable {

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                .from(String.class, String.class, Object.class)
                .dropLast()
                .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()));


        handle = Binder
                .from(String.class, String.class, Object.class, double.class)
                .dropLast(2)

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                .from(String.class, String.class, Object.class, double.class)
                .dropLast(2)
                .insert(1, "world")
                .invoke(target);


        assertEquals(MethodType.methodType(String.class, String.class, Object.class, double.class), handle.type());
        assertEquals("Hello, world", (String) handle.invokeExact("Hello, ", new Object(), 1.0));
    }


    @Test
    public void testDropFirst() throws Throwable {

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                .from(String.class, Object.class, String.class)
                .dropFirst()
                .insert(1, "world")
                .invoke(target);


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


        handle = Binder
                .from(String.class, Object.class, double.class, String.class)
                .dropFirst(2)

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                .from(String.class, Object.class, double.class, String.class)
                .dropFirst(2)
                .insert(1, "world")
                .invoke(target);


        assertEquals(MethodType.methodType(String.class, Object.class, double.class, String.class), handle.type());
        assertEquals("Hello, world", (String) handle.invokeExact(new Object(), 1.0, "Hello, "));
    }


    @Test
    public void testDropAll() throws Throwable {

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                .from(String.class, String.class, Object.class)
                .dropAll()
                .insert(0, "Hello, ", "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 testConvert() throws Throwable {

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        MethodHandle handle = Binder
                .from(String.class, Object.class, Integer.class, Float.class)
                .convert(target.type())
                .invoke(target);


        assertEquals(MethodType.methodType(String.class, Object.class, Integer.class, Float.class), handle.type());
        assertEquals(null, (String) handle.invokeExact((Object) "foo", (Integer) 5, (Float) 5.0f));
    }


    @Test
    public void testConvert2() throws Throwable {

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        MethodHandle handle = Binder
                .from(String.class, Object.class, Integer.class, Float.class)
                .convert(target.type().returnType(), target.type().parameterArray())
                .invoke(target);


        assertEquals(MethodType.methodType(String.class, Object.class, Integer.class, Float.class), handle.type());
        assertEquals(null, (String)handle.invokeExact((Object)"foo", (Integer)5, (Float)5.0f));
    }


    @Test
    public void testCast() throws Throwable {

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        MethodHandle handle = Binder
                .from(String.class, Object.class, byte.class, int.class)
                .cast(target.type())
                .invoke(target);


        assertEquals(MethodType.methodType(String.class, Object.class, byte.class, int.class), handle.type());
        assertEquals(null, (String)handle.invokeExact((Object)"foo", (byte)5, 5));
    }


    @Test
    public void testCast2() throws Throwable {

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        MethodHandle handle = Binder
                .from(String.class, Object.class, byte.class, int.class)
                .cast(target.type().returnType(), target.type().parameterArray())
                .invoke(target);


        assertEquals(MethodType.methodType(String.class, Object.class, byte.class, int.class), handle.type());
        assertEquals(null, (String)handle.invokeExact((Object)"foo", (byte)5, 5));
    }


    @Test
    public void testDropReorder() throws Throwable {

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