Method TestPickerStatusCodes

test/control_plane_status_test.go:89–148

(t *testing.T)

}

func (s) TestPickerStatusCodes(t *testing.T) {
	testCases := []struct {
		name      string
		pickerErr error
		want      error
	}{{
		name:      "legal status code",
		pickerErr: status.Errorf(codes.Unavailable, "this error is fine"),
		want:      status.Errorf(codes.Unavailable, "this error is fine"),
	}, {
		name:      "illegal status code",
		pickerErr: status.Errorf(codes.NotFound, "this error is bad"),
		want:      status.Errorf(codes.Internal, "this error is bad"),
	}}

	for _, tc := range testCases {
		t.Run(tc.name, func(t *testing.T) {
			ss := &stubserver.StubServer{
				EmptyCallF: func(context.Context, *testpb.Empty) (*testpb.Empty, error) {
					return &testpb.Empty{}, nil
				},
			}

			if err := ss.Start(nil); err != nil {
				t.Fatalf("Error starting endpoint server: %v", err)
			}
			defer ss.Stop()

			// Create a stub balancer that creates a picker that always returns
			// an error.
			sbf := stub.BalancerFuncs{
				UpdateClientConnState: func(d *stub.BalancerData, _ balancer.ClientConnState) error {
					d.ClientConn.UpdateState(balancer.State{
						ConnectivityState: connectivity.TransientFailure,
						Picker:            base.NewErrPicker(tc.pickerErr),
					})
					return nil
				},
			}
			stub.Register("testPickerStatusCodesBalancer", sbf)

			ss.NewServiceConfig(`{"loadBalancingConfig": [{"testPickerStatusCodesBalancer":{}}] }`)

			// Make calls until pickerErr is received.
			ctx, cancel := context.WithTimeout(context.Background(), defaultTestTimeout)
			defer cancel()

			var lastErr error
			for ctx.Err() == nil {
				if _, lastErr = ss.Client.EmptyCall(ctx, &testpb.Empty{}); status.Code(lastErr) == status.Code(tc.want) && strings.Contains(lastErr.Error(), status.Convert(tc.want).Message()) {
					// Success!
					return
				}
				time.Sleep(time.Millisecond)
			}

			t.Fatalf("client.EmptyCall(_, _) = _, %v; want _, %v", lastErr, tc.want)
		})