def test_extend(self):
self.assertEqual(
_.extend({}, {
"a": 'b'
}).get("a"), 'b',
'can extend an object with the attributes of another')
self.assertEqual(
_.extend({
"a": 'x'
}, {
"a": 'b'
}).get("a"), 'b', 'properties in source override destination')
self.assertEqual(
_.extend({
"x": 'x'
}, {
"a": 'b'
}).get("x"), 'x', 'properties not in source dont get overriden')
result = _.extend({"x": 'x'}, {"a": 'a'}, {"b": 'b'})
self.assertEqual(result, {
"x": 'x',
"a": 'a',
"b": 'b'
}, 'can extend from multiple source objects')
result = _.extend({"x": 'x'}, {"a": 'a', "x": 2}, {"a": 'b'})
self.assertEqual(
result, {
"x": 2,
"a": 'b'
}, 'extending from multiple source'
' objects last property trumps')
result = _.extend({}, {"a": None, "b": None})
self.assertEqual(set(_.keys(result)), {"a", "b"},
'extend does not copy undefined values')
def test_extend(self):
self.assertEqual(_.extend({}, {"a": 'b'}).get("a"), 'b', 'can extend an object with the attributes of another')
self.assertEqual(_.extend({"a": 'x'}, {"a": 'b'}).get("a"), 'b', 'properties in source override destination')
self.assertEqual(_.extend({"x": 'x'}, {"a": 'b'}).get("x"), 'x', 'properties not in source dont get overriden')
result = _.extend({"x": 'x'}, {"a": 'a'}, {"b": 'b'})
self.assertEqual(result, {"x": 'x', "a": 'a', "b": 'b'}, 'can extend from multiple source objects')
result = _.extend({"x": 'x'}, {"a": 'a', "x": 2}, {"a": 'b'})
self.assertEqual(result, {"x": 2, "a": 'b'}, 'extending from multiple source objects last property trumps')
result = _.extend({}, {"a": None, "b": None})
self.assertEqual(_.keys(result), ["a", "b"], 'extend does not copy undefined values')
def test_keys(self):
self.assertEqual(set(_.keys({
"one": 1,
"two": 2
})), {'two', 'one'}, 'can extract the keys from an object')
def test_keys(self):
self.assertEqual(set(_.keys({"one": 1, "two": 2})),
{'two', 'one'}, 'can extract the keys from an object')
