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    // Should return an array of products when the database has products
    it('should return an array of products when the database has products', async () => {
      const mockProductModel = {
        findAll: sinon.stub().resolves([{ dataValues: { id: 1, name: 'Product 1', price: '10.00', userId: 1 } }])
      };
      const result = await getAllProducts();
      expect(result).to.deep.equal([{ id: 1, name: 'Product 1', price: '10.00', userId: 1 }]);
      expect(mockProductModel.findAll.calledOnce).to.be.true;
    });

    // Should return an empty array when the database has no products
    it('should return an empty array when the database has no products', async () => {
      const mockProductModel = {
        findAll: sinon.stub().resolves([])
      };
      const result = await getAllProducts();
      expect(result).to.deep.equal([]);
      expect(mockProductModel.findAll.calledOnce).to.be.true;
    });

    // Should return an array of products with correct properties
    it('should return an array of products with correct properties', async () => {
      const mockProductModel = {
        findAll: sinon.stub().resolves([{ dataValues: { id: 1, name: 'Product 1', price: '10.00', userId: 1 } }])
      };
      const result = await getAllProducts();
      expect(result).to.deep.equal([{ id: 1, name: 'Product 1', price: '10.00', userId: 1 }]);
      expect(mockProductModel.findAll.calledOnce).to.be.true;
    });


    // Should handle errors when the database is not accessible
    it('should handle errors when the database is not accessible', async () => {
      const mockProductModel = {
        findAll: sinon.stub().rejects(new Error('Database error'))
      };
      try {
        await getAllProducts();
        expect.fail('Expected an error to be thrown');
      } catch (error) {
        expect(error.message).to.equal('Database error');
        expect(mockProductModel.findAll.calledOnce).to.be.true;
      }
    });


    // Should handle errors when the database returns invalid data
    it('should handle errors when the database returns invalid data', async () => {
      const mockProductModel = {
        findAll: sinon.stub().resolves([{ invalidProperty: 'Invalid' }])
      };
      try {
        await getAllProducts();
        expect.fail('Expected an error to be thrown');
      } catch (error) {
        expect(error.message).to.equal('Invalid data');
        expect(mockProductModel.findAll.calledOnce).to.be.true;
      }
    });


    // Should handle errors when the database query times out
    it('should handle errors when the database query times out', async () => {
      const mockProductModel = {
        findAll: sinon.stub().rejects(new Error('Query timeout'))
      };
      try {
        await getAllProducts();
        expect.fail('Expected an error to be thrown');
      } catch (error) {
        expect(error.message).to.equal('Query timeout');
        expect(mockProductModel.findAll.calledOnce).to.be.true;
      }
    });