from selenium import webdriver
from selenium.webdriver.common.by import By
from selenium.webdriver.support.ui import WebDriverWait
from selenium.webdriver.support import expected_conditions as EC

driver = webdriver.Chrome()

try:
    driver.get("https://example.com/login")

    # 要素が表示されるまで明示的に待機（手動）
    wait = WebDriverWait(driver, timeout=10)
    email = wait.until(
        EC.element_to_be_clickable((By.ID, "email"))
    )
    email.send_keys("user@example.com")

    password = driver.find_element(By.ID, "password")
    password.send_keys("secret")

    btn = driver.find_element(By.CSS_SELECTOR, "button[type='submit']")
    btn.click()

    # ページ遷移後の明示的待機
    heading = wait.until(
        EC.visibility_of_element_located((By.TAG_NAME, "h1"))
    )
    assert heading.text == "Dashboard"

finally:
    driver.quit()

from playwright.sync_api import sync_playwright, expect

with sync_playwright() as p:
    browser = p.chromium.launch()
    page = browser.new_page()

    page.goto("https://example.com/login")

    # 自動待機：操作可能になるまでPlaywrightが自動で待つ
    page.get_by_label("Email").fill("user@example.com")
    page.get_by_label("Password").fill("secret")
    page.get_by_role("button", name="Login").click()

    # expect()はポーリング不要・タイムアウト自動管理
    expect(page.get_by_role("heading", level=1)).to_have_text("Dashboard")

    browser.close()