[#26] Create test for crud-sessions.js

app/src/database/crud/__tests__/crud-sessions.test.js

@@ -0,0 +1,40 @@
+import crudSessions from '../crud-sessions';
+jest.mock('expo-sqlite');
+
+describe('crudSessions function', () => {
+  beforeEach(() => {
+    jest.clearAllMocks();
+  });
+
+  describe('addSession', () => {
+    it('should insert the session', async () => {
+      const result = await crudSessions.addSession({ token: 'Bearer abcefg', passcode: '123456' });
+      expect(result).toEqual({ rowsAffected: 1 });
+    });
+  });
+
+  describe('selectLastSession', () => {
+    it('should return false if session does not exist', async () => {
+      const result = await crudSessions.selectLastSession();
+      expect(result).toBe(false);
+    });
+
+    it('should return last session', async () => {
+      // Mock the result set for select
+      const sessions = [
+        {
+          token: 'Bearer 1',
+          passcode: '123',
+        },
+        {
+          token: 'Bearer 2',
+          passcode: '321',
+        },
+      ];
+      const mockSelectSql = jest.fn(() => sessions[1]);
+      crudSessions.selectLastSession = mockSelectSql;
+      const result = await crudSessions.selectLastSession();
+      expect(result).toEqual(sessions[1]);
+    });
+  });
+});