def test_tagged_dictionary_views_work():
x = TaggedDict()
y = x.view("animals")
z = y.view("insects")
z["0"] = "butterfly"
z["1"] = "bee"
assert len(z) == 2
z1 = y.view("mammals")
z1["0"] = "dog"
w = x.view("things")
w["0"] = "chair"
assert len(z) == 2
assert len(z1) == 1
assert len(y) == 3
assert len(w) == 1
assert len(x) == 4
assert set(x.values()) == {"chair", "dog", "bee", "butterfly"}
assert set(x[()]) == {"chair", "dog", "bee", "butterfly"}
def test_tagged_dictionary_views_add_method_unique_handles():
x = TaggedDict()
y = x.view("animals")
h1 = y.add("dog")
h2 = y.add("cat")
assert h1 != h2
def test_tagged_dictionary_views_can_remove_by_value():
x = TaggedDict()
y = x.view("animals")
h1 = y.add("dog")
y.remove("dog")
assert not y
with pytest.raises(ValueError):
y.remove("dog")
def test_tagged_dictionary_views_add_method():
x = TaggedDict()
y = x.view("animals")
h = y.add("dog")
assert h
assert y[()] == ["dog"]
assert x[()] == ["dog"]
assert h in x
del x[h]
assert not x
def test_tagged_dictionary_views_added_tag_reflects_on_other_tags():
x = TaggedDict()
y = x.view("animals")
z = y.view("insects")
z1 = y.view("mammals")
assert not y
z["mammals"] = "spyderman"
assert y
assert len(y) == 1
assert len(z) == 1
assert x["insects", "mammals"] == ["spyderman"]
def test_tagged_dictionary_can_delete_simple_items():
x = TaggedDict()
x["simple"] = "simple"
del x["simple"]
with pytest.raises(KeyError):
x["simple"]
def test_tagged_dictionary_can_delete_itens_by_any_tag():
x = TaggedDict()
x["first", "second"] = "element"
del x["first"]
assert not x
x["first", "second"] = "element"
del x["second"]
assert not x
x["first", "second"] = "element"
del x["second", "first"]
assert not x
x["first", "second"] = "element"
with pytest.raises(KeyError):
x["simple", "second", "third"]
assert x
def test_tagged_dictionary_can_contain_items_with_2_tags():
x = TaggedDict()
x["first", "second"] = "element"
assert x["first"] == ["element"]
assert x["second"] == ["element"]
def test_tagged_dictionary_can_contain_simple_items():
x = TaggedDict()
x["simple"] = "simple"
assert x["simple"] == ["simple"]
def test_tagged_dictionary_is_created():
x = TaggedDict()
assert not x