test: add test TestTimeDuration

commands/utils.go

@@ -130,7 +130,7 @@ func (d *TimeDuration) String() string {
 
 	// s
 	if d.Duration < time.Minute {
-		return fmt.Sprintf("%ds", d.Duration.Seconds())
+		return fmt.Sprintf("%.2fs", d.Duration.Seconds())
 	}
 
 	// m

commands/utils_test.go

@@ -0,0 +1,23 @@
+package commands
+
+import (
+	"testing"
+	"time"
+)
+
+func TestTimeDuration(t *testing.T) {
+	// ms
+	if (&TimeDuration{Duration: 100 * time.Millisecond}).String() != "100ms" {
+		t.Fatalf("expected 100ms, but got %s", (&TimeDuration{Duration: 100 * time.Millisecond}).String())
+	}
+
+	// s
+	if (&TimeDuration{Duration: 2*time.Second + 123*time.Millisecond}).String() != "2.12s" {
+		t.Fatalf("expected 2.12s, but got %s", (&TimeDuration{Duration: 2 * time.Second}).String())
+	}
+
+	// m
+	if (&TimeDuration{Duration: 2*time.Minute + 12*time.Second}).String() != "2m 12s" {
+		t.Fatalf("expected 2m 12s, but got %s", (&TimeDuration{Duration: 2 * time.Minute}).String())
+	}
+}