package main import ( "fmt" "net/http" "strings" "testing" "github.com/urfave/cli/v2" ) func TestCmdInstance(t *testing.T) { out := testWithServer( func(w http.ResponseWriter, r *http.Request) { switch r.URL.Path { case "/api/v1/instance": fmt.Fprintln(w, `{"title": "zzz"}`) return } http.Error(w, http.StatusText(http.StatusNotFound), http.StatusNotFound) return }, func(app *cli.App) { app.Run([]string{"mstdn", "instance"}) }, ) if !strings.Contains(out, "zzz") { t.Fatalf("%q should be contained in output of command: %v", "zzz", out) } }