使用 Selenium 测试 JS 函数的问题，在 Django 上设置：“selenium.common.exceptions.TimeoutException: Message”

Question

我只想测试 getRates() 函数。但是我遇到了无法修复的错误： selenium.common.exceptions.TimeoutException 或者我收到未定义 getRates 的错误消息。

function getRates(currency_name) {
    if(currency_name === "pln"){ return 1; }
    return fetch(`http://api.nbp.pl/api/exchangerates/rates/a/${currency_name}`)
        .then((response) => response.json())
        .then(json_data => {
            console.log(json_data);
            const value_in_pln = json_data.rates[0].mid;
            return value_in_pln;
        })
        .catch(error => {
            console.error(error);
        });
}

我的测试函数：

def test_conversion_getRates(self):
    self.driver.get(self.live_server_url + '/conv')
    curr = 'chf'
    print("1")
    wait = WebDriverWait(self.driver, 10)
    print("2")
    wait.until(expected_conditions.presence_of_element_located((By.XPATH, '//script[@src="js/converter.js"]')))
    print("3")
    # time.sleep(1)
    resultFunc = self.driver.execute_script(f'return getRates("{curr}");')
    print("resultFunc = " + resultFunc)
    response = requests.get(f'http://api.nbp.pl/api/exchangerates/rates/a/{curr}/')
    data = response.json()
    rates = data['rates']
    mid = rates[0]['mid']
    print(mid)
    self.assertEqual(resultFunc, str(mid), "Comparison Done")

我也试过：

def test_conversion_getRates(self):
    self.driver.get(self.live_server_url + '/conv')
    curr = 'chf'
    wait = WebDriverWait(self.driver, 5)
    wait.until(
        expected_conditions.presence_of_element_located((By.XPATH, '//script[@src="js/converter.js"]')))
    wait.until(lambda driver: driver.execute_script('return typeof exampleFunc !== "undefined";'))
    resultFunc = self.driver.execute_script("return exampleFunc()")
    response = requests.get(f'http://api.nbp.pl/api/exchangerates/rates/a/{curr}/')
    data = response.json()
    rates = data['rates']
    mid = rates[0]['mid']
    self.assertEqual(resultFunc, mid, "Comparison Done")

基本上它在第二次打印后崩溃，以 wait.until(...) 开头的行。

当然我的 converter.js 文件在 static 和 js 文件夹中 (WebApp/static/js/converter.js)

感谢您的帮助:)