def test_get(self):
data = {"a": {"b": 10}}
a = key("a", {})
b = key("b", 0)
ab = compose(a, b)
self.assertEqual(get(ab, data), 10, "Composed getter gets the value")
def test_set_with_defaults(self):
data = {}
a = key("a", {})
b = key("b", 0)
ab = compose(a, b)
data = put(ab, data, 11)
self.assertIsInstance(data, dict, "Setter returns container type")
self.assertEqual(data["a"]["b"], 11, "Setter sets the value at key")
def test_4(self):
data = {"b": 11}
a = key("a", 0)
data = put(a, data, 10)
self.assertIsInstance(data, dict, "Update returns container type")
self.assertEqual(data["a"], 10, "Update sets the value at key")
def test_1(self):
data = {"a": 0}
a = key("a")
x = over(a, lambda a: a + 1, data)
self.assertEqual(x["a"], 1, "over sets the value using functor")
def test_1(self):
data = {"a": 10, "b": 11}
a = key("a", 0)
self.assertEqual(get(a, data), 10, "Getter gets the value at key")
def test_deep_get(self):
data = {"a": {"b": {"c": {"d": 10}}}}
abcd = compose(key("a"), key("b"), key("c"), key("d"))
self.assertEqual(get(abcd, data), 10, "Composed getter gets the value")
def test_3(self):
data = {"b": 11}
a = key("a")
self.assertEqual(get(a, data), None,
"Getter returns None if no default value provided")
def test_2(self):
data = {"b": 11}
a = key("a", 0)
self.assertEqual(get(a, data), 0,
"Getter gets the default if no value is present")