modbus test changed to pytest format

tests/test_modbus.py

@@ -1,36 +1,32 @@
-import unittest
 from pyhoff.modbus import _get_bits, _get_words, _from_bits, _from_words
 
 
-class TestModbusFunctions(unittest.TestCase):
-
-    def test_get_bits(self):
+def test_get_bits():
     data = bytes([0b11101010, 0b11010101])
     bit_number = 16
     expected = [False, True, False, True, False, True, True, True,
                 True, False, True, False, True, False, True, True]
     result = _get_bits(data, bit_number)
-        self.assertEqual(result, expected)
+    assert result == expected
 
-    def test_get_words(self):
+
+def test_get_words():
     data = bytes([0x12, 0x34, 0x56, 0x78])
     expected = [0x1234, 0x5678]
     result = _get_words(data)
-        self.assertEqual(result, expected)
+    assert result == expected
 
-    def test_from_bits(self):
+
+def test_from_bits():
     values = [False, True, False, True, False, True, True, True,
               True, False, True, False, True, False, True, True]
     expected = bytes([0b11101010, 0b11010101])
     result = _from_bits(values)
-        self.assertEqual(result, expected)
+    assert result == expected
 
-    def test_from_words(self):
+
+def test_from_words():
     values = [0x1234, 0x5678]
     expected = bytes([0x12, 0x34, 0x56, 0x78])
     result = _from_words(values)
-        self.assertEqual(result, expected)
-
-
-if __name__ == '__main__':
-    unittest.main()
+    assert result == expected