Add TemplateUnit.__repr__ and modify its __str__ method (Bugfix) (#1049)

Add TemplateUnit.__repr__ and modify its __str__ method

Update TemplateUnit.__str__ to use the new template_id field for more
accuracy.

Add proper representation, similar to JobDefinition objects.

checkbox-ng/plainbox/impl/unit/template.py

@@ -187,7 +187,11 @@ def instantiate_template(cls, data, raw_data, origin, provider, parameters,
 
     def __str__(self):
         """String representation of Template unit objects."""
-        return "{} <~ {}".format(self.id, self.resource_id)
+        return "{} <~ {}".format(self.template_id, self.resource_id)
+
+    def __repr__(self):
+        return "<TemplateUnit template_id:{!r}>".format(
+            self.template_id)
 
     @property
     def unit(self):

checkbox-ng/plainbox/impl/unit/test_template.py

@@ -42,6 +42,25 @@
 
 class TemplateUnitTests(TestCase):
 
+    def test_str(self):
+        template = TemplateUnit({
+            "template-resource": "resource",
+            "template-id": "check-devices",
+            "id": "check-device-{dev_name}",
+        })
+        self.assertEqual(str(template), "check-devices <~ resource")
+
+    def test_repr(self):
+        template = TemplateUnit({
+            "template-resource": "resource",
+            "template-id": "check-devices",
+            "id": "check-device-{dev_name}",
+        })
+        self.assertEqual(
+            repr(template),
+            "<TemplateUnit template_id:'check-devices'>"
+        )
+
     def test_id(self):
         template = TemplateUnit({
             "template-resource": "resource",