Add a separate page for rejected alerts

We don’t want to mix these up with alerts that actually went out.

tests/app/main/views/test_broadcast.py

@@ -358,7 +358,7 @@ def test_broadcast_dashboard(
 
 
 @pytest.mark.parametrize('endpoint', (
-    '.broadcast_dashboard', '.broadcast_dashboard_previous',
+    '.broadcast_dashboard', '.broadcast_dashboard_previous', '.broadcast_dashboard_rejected',
 ))
 def test_broadcast_dashboard_does_not_have_button_for_view_only_user(
     client_request,
@@ -420,7 +420,6 @@ def test_previous_broadcasts_page(
         normalize_spaces(row.text)
         for row in page.select('.ajax-block-container')[0].select('.file-list')
     ] == [
-        'Example template This is a test Rejected today at 1:20am England Scotland',
         'Example template This is a test Broadcast yesterday at 2:20pm England Scotland',
         'Example template This is a test Broadcast yesterday at 2:20am England Scotland',
     ]
@@ -435,6 +434,40 @@ def test_previous_broadcasts_page(
     )
 
 
+@freeze_time('2020-02-20 02:20')
+def test_rejected_broadcasts_page(
+    client_request,
+    service_one,
+    mock_get_broadcast_messages,
+    mock_get_service_templates,
+):
+    service_one['permissions'] += ['broadcast']
+    page = client_request.get(
+        '.broadcast_dashboard_rejected',
+        service_id=SERVICE_ONE_ID,
+    )
+
+    assert normalize_spaces(page.select_one('main h1').text) == (
+        'Rejected alerts'
+    )
+    assert len(page.select('.ajax-block-container')) == 1
+    assert [
+        normalize_spaces(row.text)
+        for row in page.select('.ajax-block-container')[0].select('.file-list')
+    ] == [
+        'Example template This is a test Rejected today at 1:20am England Scotland',
+    ]
+
+    button = page.select_one(
+        '.js-stick-at-bottom-when-scrolling a.govuk-button.govuk-button--secondary'
+    )
+    assert normalize_spaces(button.text) == 'New alert'
+    assert button['href'] == url_for(
+        'main.new_broadcast',
+        service_id=SERVICE_ONE_ID,
+    )
+
+
 def test_new_broadcast_page(
     client_request,
     service_one,
@@ -1419,6 +1452,7 @@ def test_view_broadcast_message_page(
 @pytest.mark.parametrize('endpoint', (
     '.view_current_broadcast',
     '.view_previous_broadcast',
+    '.view_rejected_broadcast',
 ))
 @pytest.mark.parametrize('status, expected_highlighted_navigation_item, expected_back_link_endpoint', (
     (
@@ -1443,8 +1477,8 @@ def test_view_broadcast_message_page(
     ),
     (
         'rejected',
-        'Previous alerts',
-        '.broadcast_dashboard_previous',
+        'Rejected alerts',
+        '.broadcast_dashboard_rejected',
     ),
 ))
 @freeze_time('2020-02-22T22:22:22.000000')