Add granular consent preference flow and regression tests

apps/core/tests/test_consent.py

@@ -21,3 +21,47 @@ def test_consent_post_view(client):
     resp = client.post("/consent/", {"accept_all": "1"}, follow=False)
     assert resp.status_code == 302
     assert CONSENT_COOKIE_NAME in resp.cookies
+
+
+@pytest.mark.django_db
+def test_consent_get_without_cookie_defaults_false():
+    request = HttpRequest()
+    state = ConsentService.get_consent(request)
+    assert state.analytics is False
+    assert state.advertising is False
+    assert state.requires_prompt is True
+
+
+@pytest.mark.django_db
+def test_consent_malformed_cookie_returns_safe_default():
+    request = HttpRequest()
+    request.COOKIES[CONSENT_COOKIE_NAME] = "not=a=valid%%%cookie"
+    state = ConsentService.get_consent(request)
+    assert state.analytics is False
+    assert state.advertising is False
+
+
+@pytest.mark.django_db
+def test_consent_post_preferences(client):
+    resp = client.post("/consent/", {"analytics": "1", "advertising": ""})
+    assert resp.status_code == 302
+    value = resp.cookies[CONSENT_COOKIE_NAME].value
+    assert "a=1" in value
+    assert "d=0" in value
+
+
+@pytest.mark.django_db
+def test_consent_get_method_not_allowed(client):
+    resp = client.get("/consent/")
+    assert resp.status_code == 405
+
+
+@pytest.mark.django_db
+def test_cookie_banner_hides_after_consent(client, home_page):
+    first = client.get("/")
+    assert "id=\"cookie-banner\"" in first.content.decode()
+    consented = client.post("/consent/", {"accept_all": "1"})
+    cookie_value = consented.cookies[CONSENT_COOKIE_NAME].value
+    client.cookies[CONSENT_COOKIE_NAME] = cookie_value
+    second = client.get("/")
+    assert "id=\"cookie-banner\"" not in second.content.decode()