Redirect to new organisation after creation

The thing you want to do after creating an org is probably set some
domains or default branding, so let’s take you to the page where you can
do that.

app/main/views/organisations.py

@@ -54,8 +54,10 @@ def add_organisation():
     form = NewOrganisationForm()
 
     if form.validate_on_submit():
-        Organisation.create_from_form(form)
-        return redirect(url_for('.organisations'))
+        return redirect(url_for(
+            '.organisation_settings',
+            org_id=Organisation.create_from_form(form).id,
+        ))
 
     return render_template(
         'views/organisations/add-organisation.html',

tests/app/main/views/organisations/test_organisation.py

@@ -103,7 +103,8 @@ def test_create_new_organisation(
     mocker,
 ):
     mock_create_organisation = mocker.patch(
-        'app.organisations_client.create_organisation'
+        'app.organisations_client.create_organisation',
+        return_value=organisation_json(ORGANISATION_ID),
     )
 
     client_request.login(platform_admin_user)
@@ -113,7 +114,12 @@ def test_create_new_organisation(
             'name': 'new name',
             'organisation_type': 'local',
             'crown_status': 'non-crown',
-        }
+        },
+        _expected_redirect=url_for(
+            'main.organisation_settings',
+            org_id=ORGANISATION_ID,
+            _external=True,
+        ),
     )
 
     mock_create_organisation.assert_called_once_with(