Овсюхно - Лабораторная работа #2

Isn't folowing test equivalent to the one you've offered?
```c++
    @Test
    public void computeButtonIsDisabledWhenFormatIsBad() {
        setTestData();
        viewModel.aXProperty().set("bad");

        assertTrue(viewModel.computationDisabledProperty().get());
    }
```