some tests and reformating

config.yaml.exp

@@ -7,4 +7,22 @@ host: 127.0.0.1
 alert_rooms:
   - "#troy:matrix.org"
   - "#ithaca:matrix.org"
+templates:
+  "Test": |
+    {% if alert['labels']['severity'] == 'critical' and alert['status'] == 'firing' %}
+    @room<b><font color='red'>
+    {% elif alert['labels']['severity'] == 'warning' and alert['status'] == 'firing' %}
+    <b><font color='orange'>
+    {% elif alert['status'] == 'resolved' %}
+    <b><font color='green'> End of alert
+    {% else %}
+    <b><font>
+    {% endif %}
+    {{ alert['labels']['alertname'] }}: {{ alert['labels']['instance'] }} <br/>
+    </font></b>
+    {{ alert['annotations']['title'] }}<br/>
+    {{ alert['annotations']['description'] }}<br/>
+
+    But this is a custom template for Cassandre, so, here is a warning:<br/>
+    <blockquote>Beware of greeks bearing gifts</blockquote>
 ...

src/kassandra/format.py

@@ -14,7 +14,12 @@ from typing import (
 from jinja2 import BaseLoader, Environment, Template
 from .config import Config
 
-default_template_raw = (
+@dataclasses.dataclass
+class Message:
+    body: str
+    formated_body: Optional[str]
+
+DEFAULT_TEMPLATE_RAW: str = (
     "{% if alert['labels']['severity'] == 'critical' and alert['status'] == 'firing' %}"
     "@room<b><font color='red'>"
     "{% elif alert['labels']['severity'] == 'warning' and alert['status'] == 'firing' %}"
@@ -30,24 +35,19 @@ default_template_raw = (
     "{{ alert['annotations']['description'] }}<br/>"
 )
 
-@dataclasses.dataclass
-class Message:
-    body: str
-    formated_body: Optional[str]
-
 def load_templates(
     config: Config
 )->defaultdict[str, Template]:
     """
         Create a dict mapping alert names to the template to use from
         the config, with a default template either from the config file
-        or the default default_template_raw.
+        or the default DEFAULT_TEMPLATE_RAW.
     """
     if config.default_template is None:
         default_template = Environment(
             loader=BaseLoader
         ).from_string(
-           default_template_raw
+           DEFAULT_TEMPLATE_RAW
         )
     else:
         default_template = Environment(