package command import ( "flag" "strings" "testing" "github.com/urfave/cli/v2" "github.com/zenizh/go-capturer" ) type TestPortData struct { urlString string expected string } func TestPort(t *testing.T) { urlString := "postgres://user:pass@host.com:5432/path/to?key=value&other=other%20value#some-fragment" tables := []TestPortData{ { urlString: urlString, expected: "5432", }, } 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() { _ = Port(c) })) if result != table.expected { t.Fatalf("URL port `%v`, should be `%v`", result, table.expected) } } }