AttributeError:“GoogleSearch”对象在通过Python unittest执行测试时没有属性“driver”

我用这个帖子 http://www.autotest.org.ua/first-autotest-with-selenium-webdriver-and-python/ 在皮查姆做项目

代码测试:

from selenium import webdriver
import unittest
from selenium.webdriver.common.keys import Keys


class GoogleSearch(unittest.TestCase):
    def setUpp(self):
        self.driver = webdriver.Chrome(executable_path="C:\Python37-32\geckodriver-v0.23.0-win64\geckodriver.exe")
        self.driver.get('https://www.google.by')
        self.driver.maximize_window()
        self.driver.implicitly_wait(10)

    def test_01(self):
        driver = self.driver
        input_field = driver.find_element_by_class_name('class="gLFyf gsfi"')
        input_field.send_keys('python')
        input_field.send_keys(Keys.ENTER)

错误:

FAILED (errors=1)

Error
Traceback (most recent call last):
  File "C:\Python37-32\lib\unittest\case.py", line 59, in testPartExecutor
    yield
  File "C:\Python37-32\lib\unittest\case.py", line 615, in run
    testMethod()
  File "D:\QA\untitled\test.py", line 13, in test_01
    driver = self.driver
AttributeError: 'GoogleSearch' object has no attribute 'driver'


Process finished with exit code 1

我不知道怎么解决。。。