feat: add accessibility testing using axe-core-python

- Integrated axe-core-python into existing test cases to check for accessibility violations

Author: TimOsahenru

tests/test.py

@@ -7,6 +7,9 @@
 from playwright.sync_api import Page, expect, sync_playwright
 
 
+from axe_core_python.sync_playwright import Axe
+
+
 @pytest.fixture(scope="module")
 def page_url(xprocess, url_port):
     """Returns the url of the live server"""
@@ -42,6 +45,15 @@ class Starter(ProcessStarter):
         # Clean up the process
         xprocess.getinfo("page_url").terminate()
 
+def test_accessibility(page_url: tuple[Page, str]):
+    """Run accessibility tests on the homepage"""
+    page, live_server_url = page_url
+    page.goto(f"{live_server_url}/")
+
+    axe = Axe()
+    results = axe.run(page)
+
+    assert len(results["violations"]) == 0, f"Accessibility violations found: {results['violations']}"
 
 def test_destination(
     loaded_route: str,
@@ -79,6 +91,12 @@ def test_headers_in_language(page_url: tuple[Page, str], route: str) -> None:
     ]  # urls start with the language if not en
     assert doc_lang == lang
 
+    axe = Axe()
+    results = axe.run(page)
+
+    assert len(results["violations"]) == 0, f"Accessibility violations found: {results['violations']}"
+
+
 
 @pytest.mark.parametrize(
     "title, url",
@@ -96,13 +114,25 @@ def test_bpdevs_title_en(page_url: tuple[Page, str], title: str, url: str) -> No
     page.goto(f"{live_server_url}{url}")
     expect(page).to_have_title(f"Black Python Devs | {title}")
 
+    axe = Axe()
+    results = axe.run(page)
+
+    assert len(results["violations"]) == 0, f"Accessibility violations found: {results['violations']}"
+
+
 
 def test_mailto_bpdevs(page_url: tuple[Page, str]) -> None:
     page, live_server_url = page_url
     page.goto(live_server_url)
     mailto = page.get_by_role("link", name="email")
     expect(mailto).to_have_attribute("href", "mailto:[email protected]")
 
+    axe = Axe()
+    results = axe.run(page)
+
+    assert len(results["violations"]) == 0, f"Accessibility violations found: {results['violations']}"
+
+
 
 @pytest.mark.parametrize(
     "url",
@@ -115,6 +145,12 @@ def test_page_description_in_index_and_blog(page_url: tuple[Page, str], url: str
     expect(page.locator("p.post-description").first).to_be_visible()
     expect(page.locator("p.post-description").first).not_to_be_empty()
 
+    axe = Axe()
+    results = axe.run(page)
+
+    assert len(results["violations"]) == 0, f"Accessibility violations found: {results['violations']}"
+
+
 
 def stem_description(
     path: pathlib.Path,
@@ -146,3 +182,9 @@ def test_page_blog_posts(
         page.locator('meta[name="description"]').get_attribute("content")
         == frontmatter["description"]
     )
+
+    axe = Axe()
+    results = axe.run(page)
+
+    assert len(results["violations"]) == 0, f"Accessibility violations found: {results['violations']}"
+