Print the expected char with the default output

cmd/tests/cmd_run_test.go

@@ -57,6 +57,7 @@ func TestSimpleTestStdin(t *testing.T) {
 	cmd.ExecuteWithGlobalState(ts.GlobalState)
 
 	stdout := ts.Stdout.String()
+	assert.Contains(t, stdout, "output: -")
 	assert.Contains(t, stdout, "default: 1 iterations for each of 1 VUs")
 	assert.Contains(t, stdout, "1 complete and 0 interrupted iterations")
 	assert.Empty(t, ts.Stderr.Bytes())

cmd/ui.go

@@ -109,8 +109,6 @@ func printExecutionDescription(
 	switch {
 	case outputOverride != "":
 		outputDescriptions = []string{outputOverride}
-	case len(outputs) == 0:
-		outputDescriptions = []string{"-"}
 	default:
 		for _, out := range outputs {
 			outputDescriptions = append(outputDescriptions, out.Description())

metrics/engine/ingester.go

@@ -23,7 +23,11 @@ type outputIngester struct {
 
 // Description returns a human-readable description of the output.
 func (oi *outputIngester) Description() string {
-	return "engine"
+	// It is used in the print banner to make visible
+	// that no output has been set from the user so the default output is used.
+	// It keeps things simple but changing this value breaks the cmd/ui.
+	// If decoupling is required then address the change in cmd/ui also.
+	return "-"
 }
 
 // Start the engine by initializing a new output.PeriodicFlusher