UT: Detect template rendering errors

This commit enables template debug option to detect errors
in template rendering in unit tests.

Several errors in template rendering are found by enabling the
debug option and they are fixed in this commit.

Related-Bug: #1809983
Change-Id: I1a2d19f2eae62e16f02d3386abd65527bac4e7a0

horizon/templates/auth/_splash.html

@@ -1,5 +0,0 @@
-{% load themes %}
-
-<div class="text-center">
-  <img class="splash-logo" src={% themable_asset "img/logo-splash.svg" %}>
-</div>

horizon/test/settings.py

@@ -85,6 +85,7 @@ TEMPLATES = [
                 'django.contrib.messages.context_processors.messages',
                 'horizon.context_processors.horizon',
             ],
+            'debug': True,
             'loaders': [
                 'django.template.loaders.filesystem.Loader',
                 'django.template.loaders.app_directories.Loader',

openstack_dashboard/templates/auth/_splash.html

@@ -0,0 +1,5 @@
+{% load themes %}
+
+<div class="text-center">
+  <img class="splash-logo" src={% themable_asset "img/logo-splash.svg" %}>
+</div>

openstack_dashboard/templates/context_selection/_project_list.html

@@ -5,7 +5,7 @@
   {% for project in projects %}
   <li>
     <a class="{% if project.enabled and project.id == project_id %} dropdown-selected{% endif %}"
-       href="{% url 'switch_tenants' project.id %}?next={{ page_url }}"
+       href="{% url 'switch_tenants' project.id %}{% if page_url %}?next={{ page_url }}{% endif %}"
        target="_self">
       <span class="fa fa-check dropdown-selected-icon"></span>
       <span class="dropdown-title">

openstack_dashboard/templates/context_selection/_region_list.html

@@ -4,7 +4,8 @@
   <li class="dropdown-header">{% trans "Regions:" %}</li>
   {% for region in regions %}
   <li>
-    <a href="{% url 'switch_services_region' region %}?next={{ page_url }}" target="_self">
+    <a href="{% url 'switch_services_region' region %}{% if page_url %}?next={{ page_url }}{% endif %}"
+       target="_self">
       <span class="region-name dropdown-title">{{ region }}</span>
       {% if region == region_name %}
       <span class="fa fa-check"></span>

openstack_dashboard/templatetags/context_selection.py

@@ -86,9 +86,10 @@ def show_project_list(context):
     request = context['request']
     projects = sorted(context['authorized_tenants'],
                       key=lambda project: project.name.lower())
+    panel = request.horizon.get('panel')
     context = {'projects': projects[:max_proj],
                'project_id': request.user.project_id,
-               'page_url': request.horizon.get('panel').get_absolute_url()}
+               'page_url': panel.get_absolute_url() if panel else None}
     return context
 
 
@@ -98,10 +99,11 @@ def show_region_list(context):
     if 'request' not in context:
         return {}
     request = context['request']
+    panel = request.horizon.get('panel')
     context = {'region_name': request.user.services_region,
                'regions': sorted(request.user.available_services_regions,
                                  key=lambda x: (x or '').lower()),
-               'page_url': request.horizon.get('panel').get_absolute_url()}
+               'page_url': panel.get_absolute_url() if panel else None}
     return context