Note that pauses are skipped during previews.

libpathod/app.py

@@ -93,7 +93,8 @@ def _preview(is_request):
         spec = spec,
         section = "main",
         syntaxerror = None,
-        error = None
+        error = None,
+        pauses = None
     )
     if not spec.strip():
         args["error"] = "Can't parse an empty spec."
@@ -113,7 +114,7 @@ def _preview(is_request):
         return render(template, **args)
 
     s = cStringIO.StringIO()
-    r.preview_safe()
+    args["pauses"] = r.preview_safe()
 
     if is_request:
         r.serve(s, check=app.config["pathod"].check_size, host="example.com")

libpathod/rparse.py

@@ -533,9 +533,11 @@ class Message:
 
     def preview_safe(self):
         """
-            Modify this message to be safe for previews.
+            Modify this message to be safe for previews. Returns a list of elided actions.
         """
+        pauses = [i for i in self.actions if i[1] == "pause"]
         self.actions = [i for i in self.actions if i[1] != "pause"]
+        return pauses
 
     def effective_length(self, actions):
         """

libpathod/templates/request_preview.html

@@ -17,6 +17,10 @@
 
     <pre>{{ output }}</pre>
 
+    {% if pauses %}
+        <p>Note: pauses are skipped when generating previews!</p>
+    {% endif %}  
+
 {% endif %}  
 {% include "request_previewform.html" %}
 {% endblock %}  

libpathod/templates/response_preview.html

@@ -17,6 +17,10 @@
 
     <pre>{{ output }}</pre>
 
+    {% if pauses %}
+        <p>Note: pauses are skipped when generating previews!</p>
+    {% endif %}  
+
 {% endif %}  
 {% include "response_previewform.html" %}
 {% endblock %}  

test/test_rparse.py

@@ -510,7 +510,7 @@ class TestResponse:
     def test_render(self):
         r = rparse.parse_response({}, "400:p0,100:dr")
         assert r.actions[0][1] == "pause"
-        r.preview_safe()
+        assert len(r.preview_safe()) == 1
         assert not r.actions[0][1] == "pause"