import unittest

class WorkerTests(unittest.TestCase):
    def setUp(self):
        self.worker = Worker('Ivan Ivanov', 1000, 10)
        
    def test_initialization(self):
        self.assertEqual('Ivan Ivanov', self.worker.name)
        self.assertEqual(1000, self.worker.salary)
        self.assertEqual(10, self.worker.energy)
        self.assertEqual(0, self.worker.money)
        
    def test_energy_incremented(self):
        worker = Worker('Ivan Ivanov', 1000, 10)
        worker.rest()
        self.assertEqual(worker.energy, 11)
        
    def test_energy_equal_to_zero(self):
        worker = Worker('Ivan Ivanov', 1000, 0)
        
        with self.assertRaises(Exception) as context:
            worker.work()
        self.assertEqual(str(context.exception), 'Not enough energy.')
        
    def test_energy_negative(self):
        worker = Worker('Ivan Ivanov', 1000, -1)
        
        with self.assertRaises(Exception) as context:
            worker.work()
        self.assertEqual(str(context.exception), 'Not enough energy.')
        
    def test_increase_worker_money(self):
        self.worker.work()
        self.assertEqual(self.worker.salary, 1000)
        
    def test_worker_energy_decreased(self):
        self.worker.work()
        self.assertEqual(self.worker.energy, 9)
        
        
    def test_get_info_returns_correct_string(self):
        self.assertEqual(self.worker.get_info(), f'Ivan Ivanov has saved 0 money.')
       
        
if __name__ == '__main__':
    unittest.main()