old_contents: import pytest
  
  from mitmproxy.addons import onboarding
  from mitmproxy.test import taddons
  
  
  @pytest.fixture
  def client():
      with onboarding.app.test_client() as client:
          yield client
  
  
  class TestApp:
      def addons(self):
          return [onboarding.Onboarding()]
  
      async def test_basic(self, client):
          ob = onboarding.Onboarding()
          with taddons.context(ob) as tctx:
              tctx.configure(ob)
              assert client.get("/").status_code == 200
  
      @pytest.mark.parametrize("ext", ["pem", "p12", "cer"])
      async def test_cert(self, client, ext, tdata):
          ob = onboarding.Onboarding()
          with taddons.context(ob) as tctx:
              tctx.configure(ob, confdir=tdata.path("mitmproxy/data/confdir"))
              resp = client.get(f"/cert/{ext}")
              assert resp.status_code == 200
              assert resp.data
  
      @pytest.mark.parametrize("ext", ["pem", "p12", "cer"])
      async def test_head(self, client, ext, tdata):
          ob = onboarding.Onboarding()
          with taddons.context(ob) as tctx:
              tctx.configure(ob, confdir=tdata.path("mitmproxy/data/confdir"))
              resp = client.head(f"http://{tctx.options.onboarding_host}/cert/{ext}")
              assert resp.status_code == 200
              assert "Content-Length" in resp.headers
              assert not resp.data
  
new_contents: import pytest
  
  from mitmproxy.addons import onboarding
  from mitmproxy.test import taddons
  
  
  @pytest.fixture
  def client():
      with onboarding.app.test_client() as client:
          yield client
  
  
  class TestApp:
      def addons(self):
          return [onboarding.Onboarding()]
  
      def test_basic(self, client):
          ob = onboarding.Onboarding()
          with taddons.context(ob) as tctx:
              tctx.configure(ob)
              assert client.get("/").status_code == 200
  
      @pytest.mark.parametrize("ext", ["pem", "p12", "cer"])
      def test_cert(self, client, ext, tdata):
          ob = onboarding.Onboarding()
          with taddons.context(ob) as tctx:
              tctx.configure(ob, confdir=tdata.path("mitmproxy/data/confdir"))
              resp = client.get(f"/cert/{ext}")
              assert resp.status_code == 200
              assert resp.data
  
      @pytest.mark.parametrize("ext", ["pem", "p12", "cer"])
      def test_head(self, client, ext, tdata):
          ob = onboarding.Onboarding()
          with taddons.context(ob) as tctx:
              tctx.configure(ob, confdir=tdata.path("mitmproxy/data/confdir"))
              resp = client.head(f"http://{tctx.options.onboarding_host}/cert/{ext}")
              assert resp.status_code == 200
              assert "Content-Length" in resp.headers
              assert not resp.data
  
subject: fix tests