More tests in WEI app, but we can still go further

apps/note/templatetags/pretty_money.py

@@ -5,17 +5,20 @@ from django import template
 
 
 def pretty_money(value):
-    if value % 100 == 0:
-        return "{:s}{:d} €".format(
-            "- " if value < 0 else "",
-            abs(value) // 100,
-        )
-    else:
-        return "{:s}{:d}.{:02d} €".format(
-            "- " if value < 0 else "",
-            abs(value) // 100,
-            abs(value) % 100,
-        )
+    try:
+        if value % 100 == 0:
+            return "{:s}{:d} €".format(
+                "- " if value < 0 else "",
+                abs(value) // 100,
+            )
+        else:
+            return "{:s}{:d}.{:02d} €".format(
+                "- " if value < 0 else "",
+                abs(value) // 100,
+                abs(value) % 100,
+            )
+    except (ValueError, TypeError):
+        return "0 €"
 
 
 register = template.Library()