class TestPrintFunctions(unittest.TestCase):
def setUp(self):
self.ev = Evaluator()
def tearDown(self):
del self.ev
def test_log5(self):
self.ev.ev('format "%0.5f"')
self.ev.ev('2 log ')
x = self.ev.pop()
actual = self.ev.format_value(x)
expected = "%0.5f" % (math.log10(2))
self.assertEqual(expected, actual)
def test_print_hex(self):
self.ev.ev('format "0x%04x"')
self.ev.ev('50')
x = self.ev.pop()
actual = self.ev.format_value(x)
expected = "0x0032"
self.assertEqual(expected, actual)
self.ev.ev('depth')
actual = self.ev.pop()
expected = 0
self.assertEqual(expected, actual)
class TestTrigonometricFunctions(unittest.TestCase):
pi = 3.14159265358979
def setUp(self):
self.ev = Evaluator()
def tearDown(self):
del self.ev
def test_todegrees(self):
self.ev.ev("pi toDegrees")
expected = 180
actual = self.ev.pop()
self.assertEqual(expected, actual)
def test_toradians(self):
self.ev.ev("90 toRadians")
expected = self.pi / 2.0
actual = self.ev.pop()
self.assertAlmostEqual(expected, actual)
def test_acos(self):
self.ev.ev("0.5 acos toDegrees")
expected = 60
actual = self.ev.pop()
self.assertAlmostEqual(expected, actual)
def test_asin(self):
self.ev.ev("3 sqrt 2 / asin toDegrees")
expected = 60
actual = self.ev.pop()
self.assertAlmostEqual(expected, actual)
def test_atan(self):
self.ev.ev("1 atan")
actual = self.ev.pop()
expected = self.pi / 4
self.assertAlmostEqual(expected, actual)
def test_atan2(self):
self.ev.ev("-1 -1 atan2")
actual = self.ev.pop()
expected = -3 * self.pi / 4
self.assertAlmostEqual(expected, actual)
def test_cos(self):
self.ev.ev("55 toRadians cos")
actual = self.ev.pop()
expected = 0.573576436351
self.assertAlmostEqual(expected, actual)
def test_sin(self):
self.ev.ev("14 toRadians sin")
actual = self.ev.pop()
expected = 0.2419218956
self.assertAlmostEqual(expected, actual)
class TestLogFunctions(unittest.TestCase):
def setUp(self):
self.ev = Evaluator()
def tearDown(self):
del self.ev
def test_exp(self):
self.ev.ev("2 exp")
actual = self.ev.pop()
expected = 7.389056098
self.assertAlmostEqual(expected, actual)
def test_ln(self):
self.ev.ev("2 ln")
actual = self.ev.pop()
expected = 0.6931471805599453
self.assertAlmostEqual(expected, actual)
def test_log(self):
self.ev.ev("2 log")
actual = self.ev.pop()
expected = 0.301029995663981
self.assertAlmostEqual(expected, actual)
class TestStackFunctions(unittest.TestCase):
def setUp(self):
self.ev = Evaluator()
def tearDown(self):
del self.ev
def test_clear(self):
self.ev.ev("1 2 3")
self.assertEqual(len(self.ev.stack), 3)
self.ev.ev("clear")
self.assertEqual(len(self.ev.stack), 0)
def test_depth(self):
self.ev.ev("45 11 depth")
expected = 2
actual = self.ev.pop()
self.assertEqual(expected, actual)
def test_drop(self):
self.ev.ev("1 2 3 drop")
self.assertListEqual(self.ev.stack, [1.0, 2.0])
def test_dup(self):
self.ev.ev("5 dup")
self.assertListEqual(self.ev.stack, [5, 5])
def test_over(self):
self.ev.ev("1 2 over")
self.assertListEqual(self.ev.stack, [1, 2, 1])
def test_rot(self):
self.ev.ev("10 20 30 rot")
self.assertListEqual(self.ev.stack, [20, 30, 10])
def test_swap(self):
self.ev.ev("10 20 30 swap")
self.assertListEqual(self.ev.stack, [10, 30, 20])
class TestArithmeticOperations(unittest.TestCase):
def setUp(self):
self.ev = Evaluator()
def tearDown(self):
del self.ev
def test_add(self):
ev = self.ev
ev.ev('2 3')
ev.do_add()
expected = 5
actual = ev.pop()
self.assertEqual(expected, actual)
def test_sub(self):
ev = self.ev
ev.ev('3 5')
ev.do_sub()
expected = -2
actual = ev.pop()
self.assertEqual(expected, actual)
def test_mult(self):
self.ev.ev("10 1.8 *")
expected = 18
actual = self.ev.pop()
self.assertEqual(expected, actual)
def test_div(self):
self.ev.ev("10 1.8 /")
expected = 5.55555555
actual = self.ev.pop()
self.assertAlmostEqual(expected, actual)
def test_increment(self):
self.ev.ev("2 ++")
expected = 3
actual = self.ev.pop()
self.assertEqual(expected, actual)
self.ev.ev("4 1+")
expected = 5
actual = self.ev.pop()
self.assertEqual(expected, actual)
def test_decrement(self):
self.ev.ev("2 --")
expected = 1
actual = self.ev.pop()
self.assertEqual(expected, actual)
self.ev.ev("4 1-")
expected = 3
actual = self.ev.pop()
self.assertEqual(expected, actual)
def test_mod(self):
self.ev.ev("7 3 mod")
expected = 1
actual = self.ev.pop()
self.assertEqual(expected, actual)
self.ev.ev("14 5 %")
expected = 4
actual = self.ev.pop()
self.assertEqual(expected, actual)
def test_int(self):
self.ev.ev("7 3 / int")
expected = 2
actual = self.ev.pop()
self.assertEqual(expected, actual)
def test_sqrt(self):
self.ev.ev("9 sqrt")
expected = 3
actual = self.ev.pop()
self.assertEqual(expected, actual)
def test_pow(self):
self.ev.ev("2 3 **")
expected = 8
actual = self.ev.pop()
self.assertEqual(expected, actual)
def test_empty_stack(self):
with StringIO() as fp:
with stdout_redirected(fp):
ev = self.ev
ev.ev('2')
ev.do_add()
output = fp.getvalue()
self.assertIn("Stack empty", output)