seperate run and render (#1)

cmd/cmd.go

@@ -92,7 +92,7 @@ $ dperf --serial /mnt/drive{1...6}
 			}
 			paths = append(paths, filepath.Clean(arg))
 		}
-		return perf.Run(c.Context(), paths...)
+		return perf.RunAndRender(c.Context(), paths...)
 	},
 }
 

pkg/dperf/perf.go

@@ -56,7 +56,7 @@ func (d *DrivePerf) runTests(ctx context.Context, path string) *DrivePerfResult
 }
 
 // Run drive performance
-func (d *DrivePerf) Run(ctx context.Context, paths ...string) error {
+func (d *DrivePerf) Run(ctx context.Context, paths ...string) ([]*DrivePerfResult, error) {
 	parallelism := len(paths)
 	if d.Serial {
 		parallelism = 1
@@ -86,6 +86,15 @@ func (d *DrivePerf) Run(ctx context.Context, paths ...string) error {
 		return results[i].ReadThroughput > results[j].ReadThroughput
 	})
 
+	return results, nil
+}
+
+// Run drive performance and render it
+func (d *DrivePerf) RunAndRender(ctx context.Context, paths ...string) error {
+	results, err := d.Run(ctx, paths...)
+	if err != nil {
+		return err
+	}
 	d.render(results)
 	return nil
 }