def test_clear_flexi():
f = Flexi()
f["alice"] = 10
f["bob"] = 20
f["carol"] = 30
f["dave"] = 40
assert len(f) == 4
assert len(f.keys()) == 4
assert len(f.values()) == 4
f.clear()
assert len(f) == 0
assert len(f.keys()) == 0
assert len(f.values()) == 0
def test_write_dot_read_subscript():
f = Flexi()
f.alice = 50
assert f["alice"] == 50
assert len(f) == 1
assert len(f.keys()) == 1
assert len(f.values()) == 1
def test_write_dot_read_get():
f = Flexi()
f.alice = 50
assert f.get("alice") == 50
assert len(f) == 1
assert len(f.keys()) == 1
assert len(f.values()) == 1
def test_write_subscript_read_get():
f = Flexi()
f["alice"] = 50
assert f.get("alice") == 50
assert len(f) == 1
assert len(f.keys()) == 1
assert len(f.values()) == 1
def test_copy_flexi():
f = Flexi()
f["alice"] = 10
f["bob"] = 20
f["carol"] = 30
f["dave"] = 40
assert len(f) == 4
assert len(f.keys()) == 4
assert len(f.values()) == 4
x = f.copy()
assert len(x) == 4
assert len(x.keys()) == 4
assert len(x.values()) == 4
def test_constructor_empty():
f = Flexi()
assert len(f) == 0
assert len(f.keys()) == 0
assert len(f.values()) == 0