if err != nil {
				t.Logf("unexpected error: %v", err)
			}
			defer rwc.Close()
		}
		panic(panicValue)
	})
	if wrapper != nil {
		handler = wrapper(handler)
	}
	cst := newClientServerTest(t, mode, handler, func(ts *httptest.Server) {
		ts.Config.ErrorLog = log.New(pw, "", 0)
	})

	// Do a blocking read on the log output pipe.
	done := make(chan bool, 1)

			if strings.HasPrefix(err.Error(), str) {
				found = true
				break
			}
		}
		if !found {
			t.Errorf("did not find error %q", str)
			t.Logf("\tseek: %s\n\t  in:", str)
			for _, err := range errs {
				t.Logf("\t      %s", err.Error())
			}
		}
	}
}

func TestSimpleForward(t *testing.T) {
	pkgs, err := loadPkgs("./testdata/simple-fwd/aaa")
	if err != nil {

	cmd := testenv.Command(t, testenv.GoToolPath(t), "tool", "compile", "-p", pkgpath, "-D", "testdata", "-importcfg", importcfgfile, "-o", outname, filename)
	cmd.Dir = dirname
	out, err := cmd.CombinedOutput()
	if err != nil {
		t.Logf("%s", out)
		t.Fatalf("go tool compile %s failed: %s", filename, err)
	}
	return outname
}

func testPath(t *testing.T, path, srcDir string) *types.Package {
	t0 := time.Now()
	fset := token.NewFileSet()

		i++

		if result.err != nil {
			t.Logf("Still waiting for the server to start - err: %v", err)
			return false, nil
		}
		if result.response.StatusCode != http.StatusOK {
			t.Logf("Still waiting for the server to start - expecting: %d, but got: %v", http.StatusOK, result.response)
			return false, nil
		}

		t.Log("The API server has started")
		return true, nil
	})

		Sleep(2 * delta)
		select {
		case <-ticker.C:
			errs = append(errs, "Ticker did not shut down")
			continue
		default:
			// ok
		}

		// Test passed, so all done.
		if len(errs) > 0 {
			t.Logf("saw %d errors, ignoring to avoid flakiness", len(errs))
			logErrs()
		}

		return
	}

	t.Errorf("saw %d errors", len(errs))
	logErrs()
}

// Issue 21874

	}
	return nil, &fs.PathError{Op: "open", Path: name, Err: fs.ErrPermission}
}

func TestTestFSWrappedErrors(t *testing.T) {
	err := TestFS(failPermFS{})
	if err == nil {
		t.Fatal("error expected")
	}
	t.Logf("Error (expecting wrapped fs.ErrPermission):\n%v", err)

	if !errors.Is(err, fs.ErrPermission) {
		t.Errorf("error should be a wrapped ErrPermission: %#v", err)
	}

	// TestFS is expected to return a list of errors.

		}
	}()
	if err := os.Chdir(temp); err != nil {
		t.Fatal(err)
	}
	t.Logf("Chdir(%#q)", temp)

	wdRelDir := filepath.VolumeName(temp) + `dir\sub` // no backslash after volume.
	absLink := filepath.Join(temp, "link")
	err = os.Symlink(wdRelDir, absLink)
	if err != nil {
		t.Fatal(err)
	}
	t.Logf("Symlink(%#q, %#q)", wdRelDir, absLink)

		100*time.Millisecond,
		func() (bool, error) {
			fakePluginHandler.Lock()
			defer fakePluginHandler.Unlock()
			if reflect.DeepEqual(fakePluginHandler.events, expected) {
				return true, nil
			}
			t.Logf("expected %#v, got %#v, will retry", expected, fakePluginHandler.events)
			return false, nil
		},
	)
	if err != nil {
		t.Fatalf("Timed out waiting for plugin to be added to actual state of world cache.")
	}
}

		// healthz checks are installed in PrepareRun
		resp, err = http.Get(server.URL + "/healthz")
		assert.NoError(err)
		data, _ := io.ReadAll(resp.Body)
		if http.StatusOK != resp.StatusCode {
			t.Logf("got %d", resp.StatusCode)
			t.Log(string(data))
			return false, nil
		}
		return true, nil
	}))
	resp, err = http.Get(server.URL + "/healthz/ping")
	assert.NoError(err)
	assert.Equal(http.StatusOK, resp.StatusCode)
}

	if err != nil {
		t.Fatalf("failed to listen: %v", err)
	}

	go func() {
		pb.RegisterIstioCertificateServiceServer(s, &ca)
		if err := s.Serve(lis); err != nil {
			t.Logf("failed to serve: %v", err)
		}
	}()
	_, port, _ := net.SplitHostPort(lis.Addr().String())
	return fmt.Sprintf("localhost:%s", port)
}

func TestCitadelClientRotation(t *testing.T) {