Record tests as separate scenes

src/spec/SceneBuilder.ts

@@ -0,0 +1,24 @@
+export interface Scene {
+  name: string,
+  start: number
+  stop: number
+  duration: number
+}
+
+export class SceneBuilder {
+  public scenes: Array<Scene> = []
+  public offset = Date.now()
+
+  public async record(name: string, callback: () => Promise<any>): Promise<any> {
+    const start = Date.now() - this.offset
+    await callback()
+    const stop = Date.now() - this.offset
+
+    this.scenes.push({
+      name,
+      start,
+      stop,
+      duration: stop - start,
+    })
+  }
+}