Add nullable_positive_or_zero_int_test.py

#18

Author: n1nj4t4nuk1

tests/unit/nullable_positive_or_zero_int_test.py

@@ -0,0 +1,62 @@
+import unittest
+
+from pyvalueobjects.errors.ValueObjectError import ValueObjectError
+from pyvalueobjects.numbers.nullable_positive_or_zero_int import NullablePositiveOrZeroInt
+
+
+class TestNullablePositiveIntValueObject(unittest.TestCase):
+    def test_value_return_input_value(self):
+        vo = NullablePositiveOrZeroInt(39)
+        self.assertEqual(39, vo.value())
+
+    def test_from_string_method_returns_int(self):
+        vo = NullablePositiveOrZeroInt.from_str('39')
+        self.assertEqual(39, vo.value())
+
+    def test_from_float_method_returns_int(self):
+        vo = NullablePositiveOrZeroInt.from_float(39.0)
+        self.assertEqual(39, vo.value())
+
+    def test_zero_value_return_input_value(self):
+        vo = NullablePositiveOrZeroInt(0)
+        self.assertEqual(0, vo.value())
+
+    def test_zero_from_string_method_returns_int(self):
+        vo = NullablePositiveOrZeroInt.from_str('0')
+        self.assertEqual(0, vo.value())
+
+    def test_zero_from_float_method_returns_int(self):
+        vo = NullablePositiveOrZeroInt.from_float(0.0)
+        self.assertEqual(0, vo.value())
+
+    def test_negative_value_raises_error(self):
+        self.assertRaises(ValueObjectError, NullablePositiveOrZeroInt, -39)
+
+    def test_from_string_method_raises_error(self):
+        self.assertRaises(ValueObjectError, NullablePositiveOrZeroInt.from_str, '-39')
+
+    def test_from_float_method_returns_negative_int(self):
+        self.assertRaises(ValueObjectError, NullablePositiveOrZeroInt.from_float, -39.0)
+
+    def test_from_string_with_not_numerical_format_raise_error(self):
+        self.assertRaises(ValueObjectError, NullablePositiveOrZeroInt.from_str, 'patata')
+
+    def test_from_float_with_decimals_raise_error(self):
+        self.assertRaises(ValueObjectError, NullablePositiveOrZeroInt.from_float, 39.1)
+
+    def test_from_str_number_with_no_decimals(self):
+        vo = NullablePositiveOrZeroInt.from_str('39.0')
+        self.assertEqual(39, vo.value())
+
+    def test_from_str_negative_number_with_no_decimals(self):
+        self.assertRaises(ValueObjectError, NullablePositiveOrZeroInt.from_str, '-39.0')
+
+    def test_from_str_number_with_decimals_raises_error(self):
+        self.assertRaises(ValueObjectError, NullablePositiveOrZeroInt.from_float, '39.1')
+
+    def test_from_str_negative_number_with_decimals_raises_error(self):
+        self.assertRaises(ValueObjectError, NullablePositiveOrZeroInt.from_float, '-39.1')
+
+    def test_none_value_return_none(self):
+        vo = NullablePositiveOrZeroInt(None)
+        self.assertEqual(None, vo.value())