test(persons.service): enhance test coverage and improve mock logic readability

- Refactored test cases to use more precise assertions and enhanced expected data validation.
- Added mock implementations for database operations and service dependencies to improve clarity.
- Improved error handling test scenarios (e.g., NotFoundException cases).
- Increased test consistency with additional checks on method call counts.

backend/src/modules/persons/services/persons.service.spec.ts

@@ -82,10 +82,23 @@ describe('PersonsService', () => {
         metadata: {},
       };
 
+      // Expected values that will be passed to the database
+      const expectedPersonData = {
+        firstName: 'John',
+        lastName: 'Doe',
+        gender: 'MALE',
+        technicalLevel: 3,
+        hasTechnicalTraining: true,
+        frenchSpeakingLevel: 5,
+        oralEaseLevel: 'COMFORTABLE',
+        projectId: 'project1',
+        attributes: {},
+      };
+
       const result = await service.create(createPersonDto);
 
       expect(mockDb.insert).toHaveBeenCalled();
-      expect(mockDb.values).toHaveBeenCalledWith(createPersonDto);
+      expect(mockDb.values).toHaveBeenCalledWith(expectedPersonData);
       expect(result).toEqual(mockPerson);
     });
   });
@@ -151,10 +164,30 @@ describe('PersonsService', () => {
         name: 'Jane Doe',
       };
 
+      // Mock the findById method to return a person
+      const existingPerson = {
+        id: 'person1',
+        firstName: 'John',
+        lastName: 'Doe',
+        projectId: 'project1',
+        attributes: {},
+        createdAt: new Date(),
+        updatedAt: new Date(),
+      };
+      jest.spyOn(service, 'findById').mockResolvedValueOnce(existingPerson);
+
+      // Expected values that will be passed to the database
+      const expectedUpdateData = {
+        firstName: 'Jane',
+        lastName: 'Doe',
+        updatedAt: expect.any(Date),
+      };
+
       const result = await service.update(id, updatePersonDto);
 
+      expect(service.findById).toHaveBeenCalledWith(id);
       expect(mockDb.update).toHaveBeenCalled();
-      expect(mockDb.set).toHaveBeenCalled();
+      expect(mockDb.set).toHaveBeenCalledWith(expectedUpdateData);
       expect(mockDb.where).toHaveBeenCalled();
       expect(result).toEqual(mockPerson);
     });
@@ -165,10 +198,8 @@ describe('PersonsService', () => {
         name: 'Jane Doe',
       };
 
-      mockDb.update.mockImplementationOnce(() => mockDbOperations);
-      mockDbOperations.set.mockImplementationOnce(() => mockDbOperations);
-      mockDbOperations.where.mockImplementationOnce(() => mockDbOperations);
-      mockDbOperations.returning.mockImplementationOnce(() => []);
+      // Mock the findById method to throw a NotFoundException
+      jest.spyOn(service, 'findById').mockRejectedValueOnce(new NotFoundException(`Person with ID ${id} not found`));
 
       await expect(service.update(id, updatePersonDto)).rejects.toThrow(NotFoundException);
     });
@@ -178,6 +209,11 @@ describe('PersonsService', () => {
     it('should delete a person', async () => {
       const id = 'person1';
 
+      // Mock the database to return a person
+      mockDb.delete.mockImplementationOnce(() => mockDbOperations);
+      mockDbOperations.where.mockImplementationOnce(() => mockDbOperations);
+      mockDbOperations.returning.mockImplementationOnce(() => [mockPerson]);
+
       const result = await service.remove(id);
 
       expect(mockDb.delete).toHaveBeenCalled();
@@ -188,6 +224,7 @@ describe('PersonsService', () => {
     it('should throw NotFoundException if person not found', async () => {
       const id = 'nonexistent';
 
+      // Mock the database to return no person
       mockDb.delete.mockImplementationOnce(() => mockDbOperations);
       mockDbOperations.where.mockImplementationOnce(() => mockDbOperations);
       mockDbOperations.returning.mockImplementationOnce(() => []);
@@ -201,6 +238,17 @@ describe('PersonsService', () => {
       const projectId = 'project1';
       const groupId = 'group1';
 
+      // Mock project check
+      mockDb.select.mockImplementationOnce(() => mockDbOperations);
+      mockDbOperations.from.mockImplementationOnce(() => mockDbOperations);
+      mockDbOperations.where.mockImplementationOnce(() => [{ id: projectId }]);
+
+      // Mock group check
+      mockDb.select.mockImplementationOnce(() => mockDbOperations);
+      mockDbOperations.from.mockImplementationOnce(() => mockDbOperations);
+      mockDbOperations.where.mockImplementationOnce(() => [{ id: groupId }]);
+
+      // Mock persons query
       mockDb.select.mockImplementationOnce(() => mockDbOperations);
       mockDbOperations.from.mockImplementationOnce(() => mockDbOperations);
       mockDbOperations.innerJoin.mockImplementationOnce(() => mockDbOperations);
@@ -208,11 +256,11 @@ describe('PersonsService', () => {
 
       const result = await service.findByProjectIdAndGroupId(projectId, groupId);
 
-      expect(mockDb.select).toHaveBeenCalled();
-      expect(mockDb.from).toHaveBeenCalled();
+      expect(mockDb.select).toHaveBeenCalledTimes(3);
+      expect(mockDb.from).toHaveBeenCalledTimes(3);
       expect(mockDb.innerJoin).toHaveBeenCalled();
-      expect(mockDb.where).toHaveBeenCalled();
-      expect(result).toEqual([{ person: mockPerson }]);
+      expect(mockDb.where).toHaveBeenCalledTimes(3);
+      expect(result).toEqual([mockPerson]);
     });
   });
 
@@ -221,12 +269,31 @@ describe('PersonsService', () => {
       const personId = 'person1';
       const groupId = 'group1';
 
+      // Mock person check
+      mockDb.select.mockImplementationOnce(() => mockDbOperations);
+      mockDbOperations.from.mockImplementationOnce(() => mockDbOperations);
+      mockDbOperations.where.mockImplementationOnce(() => [mockPerson]);
+
+      // Mock group check
+      mockDb.select.mockImplementationOnce(() => mockDbOperations);
+      mockDbOperations.from.mockImplementationOnce(() => mockDbOperations);
+      mockDbOperations.where.mockImplementationOnce(() => [mockGroup]);
+
+      // Mock relation check
+      mockDb.select.mockImplementationOnce(() => mockDbOperations);
+      mockDbOperations.from.mockImplementationOnce(() => mockDbOperations);
+      mockDbOperations.where.mockImplementationOnce(() => []);
+
+      // Mock relation creation
       mockDb.insert.mockImplementationOnce(() => mockDbOperations);
       mockDbOperations.values.mockImplementationOnce(() => mockDbOperations);
       mockDbOperations.returning.mockImplementationOnce(() => [mockPersonToGroup]);
 
       const result = await service.addToGroup(personId, groupId);
 
+      expect(mockDb.select).toHaveBeenCalledTimes(3);
+      expect(mockDb.from).toHaveBeenCalledTimes(3);
+      expect(mockDb.where).toHaveBeenCalledTimes(3);
       expect(mockDb.insert).toHaveBeenCalled();
       expect(mockDb.values).toHaveBeenCalledWith({
         personId,
@@ -241,14 +308,16 @@ describe('PersonsService', () => {
       const personId = 'person1';
       const groupId = 'group1';
 
+      // Mock delete operation
       mockDb.delete.mockImplementationOnce(() => mockDbOperations);
       mockDbOperations.where.mockImplementationOnce(() => mockDbOperations);
+      mockDbOperations.where.mockImplementationOnce(() => mockDbOperations);
       mockDbOperations.returning.mockImplementationOnce(() => [mockPersonToGroup]);
 
       const result = await service.removeFromGroup(personId, groupId);
 
       expect(mockDb.delete).toHaveBeenCalled();
-      expect(mockDb.where).toHaveBeenCalled();
+      expect(mockDb.where).toHaveBeenCalledTimes(2);
       expect(result).toEqual(mockPersonToGroup);
     });
 
@@ -256,8 +325,10 @@ describe('PersonsService', () => {
       const personId = 'nonexistent';
       const groupId = 'group1';
 
+      // Mock delete operation to return no relation
       mockDb.delete.mockImplementationOnce(() => mockDbOperations);
       mockDbOperations.where.mockImplementationOnce(() => mockDbOperations);
+      mockDbOperations.where.mockImplementationOnce(() => mockDbOperations);
       mockDbOperations.returning.mockImplementationOnce(() => []);
 
       await expect(service.removeFromGroup(personId, groupId)).rejects.toThrow(NotFoundException);