refactor: Implement test run helper to work with services

packages/backend/src/services/flow.ts

@@ -0,0 +1,24 @@
+import Flow from '../models/flow';
+import globalVariable from '../helpers/global-variable';
+
+type ProcessFlowOptions = {
+  flowId: string;
+  testRun?: boolean;
+};
+
+export const processFlow = async (options: ProcessFlowOptions) => {
+  const flow = await Flow.query().findById(options.flowId).throwIfNotFound();
+
+  const triggerStep = await flow.getTriggerStep();
+  const triggerCommand = await triggerStep.getTriggerCommand();
+
+  const $ = await globalVariable({
+    flow,
+    connection: await triggerStep.$relatedQuery('connection'),
+    app: await triggerStep.getApp(),
+    step: triggerStep,
+    testRun: options.testRun,
+  });
+
+  return await triggerCommand.run($);
+};