below are two failing unit tests that demonstrate the misbehaviour. Reason seems to be the wrong order of
properties passed to the binding.


    /**
     * Bug: BooleanProperty.booleanProperty calls setter
     *
     * Reason is wrong way round bidi-binding, see below
     */
    @Test
    public void testBooleanBidiBindingInWrapper() {
        List<Object> setterInvokes = new ArrayList<>();
        Boolean initialValue = Boolean.FALSE;
        ObjectProperty<Boolean> p = new SimpleObjectProperty<Boolean>(initialValue) {
            
            @Override
            public void set(Boolean newValue) {
                setterInvokes.add(newValue);
                super.set(newValue);
            }
            
        };
        BooleanProperty wrap = BooleanProperty.booleanProperty(p);
        assertEquals("wrapper property value must be same", p.getValue(), wrap.getValue());
        // accidentally the same (defaults to false)
        assertEquals("wrapped property value must be unchanged", initialValue, p.getValue());
        assertEquals("wrapped setter must not be called", 0, setterInvokes.size());
    }
    
    /**
     * Bug: BooleanProperty.booleanProperty changes the value of the wrappee.
     *
     * The bidi-binding is the wrong way round, that's why the wrappee's
     * setter is invoked.
     *
     * Same for concrete numberProperty (seen in Integer), StringProperty has no
     * static wrapper.
     */
    @Test
    public void testBooleanBidiBindingInWrapperTrueInitial() {
        Boolean initialValue = Boolean.TRUE;
        ObjectProperty<Boolean> p = new SimpleObjectProperty<Boolean>(initialValue);
        assertTrue(p.get());
        BooleanProperty wrap = BooleanProperty.booleanProperty(p);
        assertEquals("wrapper property value must be same", p.getValue(), wrap.getValue());
        assertEquals("wrapped property value must be unchanged", initialValue, p.getValue());
    }