Method test_single_expresion

t/unit/tasks/test_canvas.py:717–720

(self)

        assert res == 20

    def test_single_expresion(self):
        x = chain(self.add.s(1, 2)).apply()
        assert x.get() == 3
        assert x.parent is None

    def test_empty_chain_returns_none(self):
        assert chain(app=self.app)() is None