Add some views for selecting broadcast areas

These are just so we have some pages to click through for now. They
don’t use real templates, or any of the broadcast stuff from the
database.

But I think it’s useful to get some skeleton pages in first so that we
can see the map etc working in production, then build on that, without
having to do it all in one mega PR.

For that reason there are two short term things I’ve done in this commit
which should be revisited soon:
- no tests for the endpoints
- data about which areas are selected is stored in the session

tests/app/main/views/test_broadcast.py

@@ -0,0 +1,121 @@
+import pytest
+from flask import url_for
+
+from tests.conftest import SERVICE_ONE_ID
+
+
+@pytest.mark.parametrize('endpoint, extra_args', (
+    ('.broadcast', {}),
+    ('.preview_broadcast_areas', {}),
+    ('.choose_broadcast_library', {}),
+    ('.choose_broadcast_area', {'library_slug': 'countries'}),
+    ('.add_broadcast_area', {'area_slug': 'england'}),
+    ('.remove_broadcast_area', {'area_slug': 'england'}),
+    ('.preview_broadcast_message', {}),
+))
+def test_broadcast_pages_403_without_permission(
+    client_request,
+    endpoint,
+    extra_args,
+):
+    client_request.get(
+        endpoint,
+        service_id=SERVICE_ONE_ID,
+        _expected_status=403,
+        **extra_args
+    )
+
+
+def test_broadcast_page(
+    client_request,
+    service_one,
+):
+    service_one['permissions'] += ['broadcast']
+    client_request.get(
+        '.broadcast',
+        service_id=SERVICE_ONE_ID,
+        _expected_redirect=url_for(
+            '.preview_broadcast_areas',
+            service_id=SERVICE_ONE_ID,
+            _external=True,
+        ),
+    ),
+
+
+def test_preview_broadcast_areas_page(
+    client_request,
+    service_one,
+):
+    service_one['permissions'] += ['broadcast']
+    client_request.get(
+        '.preview_broadcast_areas',
+        service_id=SERVICE_ONE_ID,
+    )
+
+
+def test_choose_broadcast_library_page(
+    client_request,
+    service_one,
+):
+    service_one['permissions'] += ['broadcast']
+    client_request.get(
+        '.choose_broadcast_library',
+        service_id=SERVICE_ONE_ID,
+    )
+
+
+def test_choose_broadcast_area_page(
+    client_request,
+    service_one,
+):
+    service_one['permissions'] += ['broadcast']
+    client_request.get(
+        '.choose_broadcast_area',
+        service_id=SERVICE_ONE_ID,
+        library_slug='countries',
+    )
+
+
+def test_add_broadcast_area_page(
+    client_request,
+    service_one,
+):
+    service_one['permissions'] += ['broadcast']
+    client_request.get(
+        '.add_broadcast_area',
+        service_id=SERVICE_ONE_ID,
+        area_slug='england',
+        _expected_redirect=url_for(
+            '.preview_broadcast_areas',
+            service_id=SERVICE_ONE_ID,
+            _external=True,
+        ),
+    ),
+
+
+def test_remove_broadcast_area_page(
+    client_request,
+    service_one,
+):
+    service_one['permissions'] += ['broadcast']
+    client_request.get(
+        '.remove_broadcast_area',
+        service_id=SERVICE_ONE_ID,
+        area_slug='england',
+        _expected_redirect=url_for(
+            '.preview_broadcast_areas',
+            service_id=SERVICE_ONE_ID,
+            _external=True,
+        ),
+    ),
+
+
+def test_preview_broadcast_message_page(
+    client_request,
+    service_one,
+):
+    service_one['permissions'] += ['broadcast']
+    client_request.get(
+        '.preview_broadcast_message',
+        service_id=SERVICE_ONE_ID,
+    ),

tests/app/main/views/test_templates.py

@@ -693,6 +693,10 @@ def test_view_broadcast_template(
         (link.text.strip(), link['href'])
         for link in page.select('.pill-separate-item')
     ] == [
+        ('Prepare broadcast', url_for(
+            '.broadcast',
+            service_id=SERVICE_ONE_ID,
+        )),
         ('Edit', url_for(
             '.edit_service_template',
             service_id=SERVICE_ONE_ID,