

class TestDemo1:
    def test_a(self, connectDB):
        print("\n执行用例a")

    def test_b(self, connectDB):
        print("\n执行用例b")

class TestDemo2:
    def test_a(self, connectDB):
        print("\n执行用例a")

    def test_b(self, connectDB):
        print("\n执行用例b")