def test_calculate(self):
		im = Image.open(self._data_path('100x100.png'))
		fit = Fit(im, width=50, height=50)
		self.assertEqual(fit.calculate(), (50, 50))
		fit = Fit(im, width=50)
		self.assertEqual(fit.calculate(), (50, 50))
		fit = Fit(im, height=50)
		self.assertEqual(fit.calculate(), (50, 50))
		fit = Fit(im, width=60, height=50)
		self.assertEqual(fit.calculate(), (50, 50))