package clientinterceptors import ( "context" "errors" "testing" "github.com/stretchr/testify/assert" "google.golang.org/grpc" ) func TestPromMetricInterceptor(t *testing.T) { tests := []struct { name string err error }{ { name: "nil", err: nil, }, { name: "with error", err: errors.New("mock"), }, } for _, test := range tests { t.Run(test.name, func(t *testing.T) { cc := new(grpc.ClientConn) err := PrometheusInterceptor(context.Background(), "/foo", nil, nil, cc, func(ctx context.Context, method string, req, reply interface{}, cc *grpc.ClientConn, opts ...grpc.CallOption) error { return test.err }) assert.Equal(t, test.err, err) }) } }