package commands import ( "flag" "strings" "testing" "github.com/kami-zh/go-capturer" "github.com/urfave/cli/v2" ) type TestUserData struct { urlString string expected string } func TestUser(t *testing.T) { urlString := "postgres://user:pass@host.com:5432/path/to?key=value&other=other%20value#some-fragment" tables := []TestUserData{ { urlString: urlString, expected: "user", }, } for _, table := range tables { app := cli.NewApp() set := flag.NewFlagSet("test", 0) set.String("url", table.urlString, "test url") c := cli.NewContext(app, set, nil) result := strings.TrimSpace(capturer.CaptureStdout(func() { User(c) })) if result != table.expected { t.Fatalf("URL user `%v`, should be `%v`", result, table.expected) } } }