Add check tour notification page

On submit of form on this page, will continue to normal sending flow
which can be shared code as there is no longer previous context needed
of where they have come from

app/main/views/tour.py

@@ -111,4 +111,30 @@ def _get_tour_step_back_link(service_id, template_id, step_index):
 @main.route("/services/<uuid:service_id>/tour/<uuid:template_id>/check", methods=['GET'])
 @user_has_permissions('send_messages', restrict_admin_usage=True)
 def check_tour_notification(service_id, template_id):
-    pass
+    db_template = current_service.get_template(template_id)
+
+    template = get_template(
+        db_template,
+        current_service,
+        show_recipient=True,
+    )
+
+    placeholders = fields_to_fill_in(template, prefill_current_user=True)
+
+    if not all_placeholders_in_session(template.placeholders):
+        return redirect(url_for(
+            '.tour_step', service_id=current_service.id, template_id=template_id, step_index=1
+        ))
+
+    back_link = url_for(
+        '.tour_step', service_id=current_service.id, template_id=template_id, step_index=len(placeholders)
+    )
+
+    template.values = get_recipient_and_placeholders_from_session(template.template_type)
+
+    return render_template(
+        'views/notifications/check.html',
+        template=template,
+        back_link=back_link,
+        help='2',
+    )

tests/app/main/views/test_tour.py

@@ -456,3 +456,87 @@ def test_get_test_step_out_of_index_redirects_to_check_notification_if_all_place
             _external=True
         ),
     )
+
+
+def test_should_200_for_check_tour_notification(
+    client_request,
+    mock_get_service_template_with_multiple_placeholders,
+    service_one,
+    fake_uuid,
+):
+    with client_request.session_transaction() as session:
+        session['placeholders'] = {'one': 'hello', 'two': 'hi', 'three': 'howdy', 'phone number': '07700 900762'}
+
+    page = client_request.get(
+        'main.check_tour_notification',
+        service_id=SERVICE_ONE_ID,
+        template_id=fake_uuid,
+    )
+
+    assert normalize_spaces(
+        page.select('.banner-tour .heading-medium')[0].text
+    ) == (
+        'Try sending yourself this example'
+    )
+    selected_hint = page.select('.banner-tour .govuk-grid-row')[1]
+    selected_hint_text = normalize_spaces(selected_hint.select(".govuk-body")[0].text)
+    assert "greyed-out-step" not in selected_hint["class"]
+    assert selected_hint_text == 'The template pulls in the data you provide'
+
+    assert normalize_spaces(
+        page.select('.sms-message-recipient')[0].text
+    ) == (
+        'To: 07700 900762'
+    )
+    assert normalize_spaces(
+        page.select('.sms-message-wrapper')[0].text
+    ) == (
+        'service one: hello hi howdy'
+    )
+
+
+def test_back_link_from_check_tour_notification_points_to_last_tour_step(
+    client_request,
+    mock_get_service_template_with_multiple_placeholders,
+    service_one,
+    fake_uuid,
+):
+    with client_request.session_transaction() as session:
+        session['placeholders'] = {'one': 'hello', 'two': 'hi', 'three': 'howdy', 'phone number': '07700 900762'}
+
+    page = client_request.get(
+        'main.check_tour_notification',
+        service_id=SERVICE_ONE_ID,
+        template_id=fake_uuid,
+    )
+
+    assert page.select('.govuk-back-link')[0]['href'] == url_for(
+        "main.tour_step",
+        service_id=SERVICE_ONE_ID,
+        template_id=fake_uuid,
+        step_index=3
+    )
+
+
+def test_check_tour_notification_redirects_to_first_step_if_not_all_placeholders_in_session(
+    client_request,
+    mock_get_service_template_with_multiple_placeholders,
+    service_one,
+    fake_uuid,
+):
+    with client_request.session_transaction() as session:
+        session['placeholders'] = {'one': 'hello', 'two': 'hi', 'phone number': '07700 900762'}
+
+    client_request.get(
+        'main.check_tour_notification',
+        service_id=SERVICE_ONE_ID,
+        template_id=fake_uuid,
+        _expected_status=302,
+        _expected_redirect=url_for(
+            'main.tour_step',
+            service_id=SERVICE_ONE_ID,
+            template_id=fake_uuid,
+            step_index=1,
+            _external=True
+        ),
+    )