python-tdd/src/functional_tests/base.py

import os
import time

from django.contrib.staticfiles.testing import StaticLiveServerTestCase
from selenium import webdriver
from selenium.common.exceptions import WebDriverException
from selenium.webdriver.common.by import By

MAX_WAIT = 5

class FunctionalTest(StaticLiveServerTestCase):
    # Helper methods
    def setUp(self):
        self.browser = webdriver.Firefox()
        if test_server := os.environ.get('TEST_SERVER'):
            self.live_server_url = 'http://' + test_server
    
    def tearDown(self):
        self.browser.quit()

    def wait_for(self, fn):
        start_time = time.time()
        while True:
            try:
                return fn()
            except (AssertionError, WebDriverException):
                if time.time() - start_time > MAX_WAIT:
                    raise
                time.sleep(0.5)

    def wait_for_row_in_list_table(self, row_text):
        start_time = time.time()
        while True:
            try:
                table = self.browser.find_element(By.ID, 'id_list_table')
                rows = table.find_elements(By.TAG_NAME, 'tr')
                self.assertIn(row_text, [row.text for row in rows])
                return
            except (AssertionError, WebDriverException):
                if time.time() - start_time > MAX_WAIT:
                    raise
                time.sleep(0.5)

    def get_item_input_box(self):
        return self.browser.find_element(By.ID, "id_text")
    
    def wait_to_be_logged_in(self, email):
        self.wait_for(
            lambda: self.browser.find_element(By.CSS_SELECTOR, "#id_logout"),
        )
        navbar = self.browser.find_element(By.CSS_SELECTOR, ".navbar")
        self.assertIn(email, navbar.text)

    def wait_to_be_logged_out(self, email):
        self.wait_for(
            lambda: self.browser.find_element(By.CSS_SELECTOR, "input[name=email]"),
        )
        navbar = self.browser.find_element(By.CSS_SELECTOR, ".navbar")
        self.assertNotIn(email, navbar.text)