def test_get_default_value(self):
"""
Tests the case that the environment variable does not
exists and the value is needed.
"""
expected = None
actual = EnvironmentVariable("Hello,World").get_value()
self.assertEqual(expected, actual)
expected = True
actual = EnvironmentVariable("Hello,World").get_value(default=True)
self.assertEqual(expected, actual)
def test_set_value_wrong_type(self):
"""
Tests the case that we want to set a non string value.
"""
self.assertRaises(TypeError,
lambda: EnvironmentVariable("TEST").set_value(1))
def test_name_does_not_exists(self):
"""
Tests the case that a name does not exist.
"""
expected = False
actual = EnvironmentVariable("HELLO,WORLD").exists()
self.assertEqual(expected, actual)
def test_get_value(self):
"""
Tests the case that the value is needed.
"""
environ["TEST"] = "Hello, World!"
expected = "Hello, World!"
actual = EnvironmentVariable("TEST").get_value()
self.assertEqual(expected, actual)
def test_name_exists(self):
"""
Tests the case that a name exist.
"""
environ["TEST"] = "test"
expected = True
actual = EnvironmentVariable("TEST").exists()
self.assertEqual(expected, actual)
def test_set_value(self):
"""
Tests the case the we want to set the value of an environment variable.
"""
expected_value = "Hello!"
expected_output = True
actual = EnvironmentVariable("TEST").set_value("Hello!")
self.assertEqual(expected_output, actual)
self.assertEqual(expected_value, environ["TEST"])