251121:1700 Backend T3 wait testt

backend/src/modules/workflow-engine/workflow-engine.service.spec.ts

@@ -1,5 +1,7 @@
 import { Test, TestingModule } from '@nestjs/testing';
 import { WorkflowEngineService } from './workflow-engine.service';
+import { WorkflowAction } from './interfaces/workflow.interface';
+import { BadRequestException } from '@nestjs/common';
 
 describe('WorkflowEngineService', () => {
   let service: WorkflowEngineService;
@@ -15,4 +17,50 @@ describe('WorkflowEngineService', () => {
   it('should be defined', () => {
     expect(service).toBeDefined();
   });
+
+  describe('processAction', () => {
+    // 🟢 กรณี: อนุมัติทั่วไป (ไปขั้นต่อไป)
+    it('should move to next step on APPROVE', () => {
+      const result = service.processAction(1, 3, WorkflowAction.APPROVE);
+      expect(result.nextStepSequence).toBe(2);
+      expect(result.shouldUpdateStatus).toBe(false);
+    });
+
+    // 🟢 กรณี: อนุมัติขั้นตอนสุดท้าย (จบงาน)
+    it('should complete workflow on APPROVE at last step', () => {
+      const result = service.processAction(3, 3, WorkflowAction.APPROVE);
+      expect(result.nextStepSequence).toBeNull(); // ไม่มีขั้นต่อไป
+      expect(result.shouldUpdateStatus).toBe(true);
+      expect(result.documentStatus).toBe('COMPLETED');
+    });
+
+    // 🔴 กรณี: ปฏิเสธ (จบงานทันที)
+    it('should stop workflow on REJECT', () => {
+      const result = service.processAction(1, 3, WorkflowAction.REJECT);
+      expect(result.nextStepSequence).toBeNull();
+      expect(result.shouldUpdateStatus).toBe(true);
+      expect(result.documentStatus).toBe('REJECTED');
+    });
+
+    // 🟠 กรณี: ส่งกลับ (ย้อนกลับ 1 ขั้น)
+    it('should return to previous step on RETURN', () => {
+      const result = service.processAction(2, 3, WorkflowAction.RETURN);
+      expect(result.nextStepSequence).toBe(1);
+      expect(result.shouldUpdateStatus).toBe(true);
+      expect(result.documentStatus).toBe('REVISE_REQUIRED');
+    });
+
+    // 🟠 กรณี: ส่งกลับ (ระบุขั้น)
+    it('should return to specific step on RETURN', () => {
+      const result = service.processAction(3, 5, WorkflowAction.RETURN, 1);
+      expect(result.nextStepSequence).toBe(1);
+    });
+
+    // ❌ กรณี: Error (ส่งกลับต่ำกว่า 1)
+    it('should throw error if return step is invalid', () => {
+      expect(() => {
+        service.processAction(1, 3, WorkflowAction.RETURN);
+      }).toThrow(BadRequestException);
+    });
+  });
 });