Playwright is a cross-browser, cross-platform, cross-language tool for end-to-end testing web applications. It validates an integrated MVP after APIs, parsing, databases, and dashboards work together. section 7.0 section 7.9
A practical Python workflow includes:
- Install pytest-playwright with pip, then run playwright install to install the required browser extensions. section 7.9
- Explore interactions in an interactive Python console with a visible browser by launching Chromium with headless=False. section 7.9
- Navigate to pages, locate controls, fill fields, click buttons, wait for rendered elements, and assert URLs, identifiers, text, visibility, and responses. section 7.9 section 9.2.4
- Use get_by_role for accessible element selection; its ARIA-based approach can support pages compatible with assistive-technology standards. section 7.9
Testing an ACH search
An integration test clears the database, loads an ACH file, opens the search page, enters “sally saver,” waits for the transaction-search response, checks for HTTP 200, verifies the visible result, and captures a screenshot. Pytest fixtures can display the browser and isolate each page with a fresh context. section 9.2.4
Listing 9.19 Playwright testing
def test_dashboard(page: Page):
page.goto("http://localhost:3000/search") #1
page.expect_navigation(wait_until="load") #2
expect(page).to_have_url("http://localhost:3000/search") #2
search_criteria = page.get_by_role("textbox") #3
search_criteria.fill("sally saver") #4
search_button = page.locator("#searchbtn") #4
with page.expect_response("**/files/transactions/search*") #5
➥ as response_info: #6
search_button.click() #6
response = response_info.value #6
assert response.status == 200 #6
search_result = page.locator('div[title="Sally Saver"]') #7
expect(search_result).to_be_visible() #8
page.screenshot(path="screenshots/search_results.png") #8
The listing provides a compact reference for navigation, role-based input, response waiting, status checking, visibility assertions, and screenshots. section 9.2.4
