Add testing for increasing Headings on Markdown export

features/exporting.feature

@@ -26,3 +26,56 @@ Feature: Exporting a Journal
         Then we should get no error
         and the output should be parsable as json
         and the json output should contain entries.0.uuid = "4BB1F46946AD439996C9B59DE7C4DDC1"
+
+    Scenario: Increasing Headings on Markdown export
+        Given we use the config "markdown-headings-335.yaml"
+        When we run "jrnl --export markdown"
+        Then we should get error
+        """
+        WARNING: Headings increased past H6 on export - 2015-04-14 13:23 Heading Test
+        """
+        and the output should be
+        """
+        2015
+        ====
+
+        April
+        -----
+
+        ### 2015-04-14 13:23 Heading Test
+
+        #### H1-1
+
+        #### H1-2
+
+        #### H1-3
+
+        ##### H2-1
+
+        ##### H2-2
+
+        ##### H2-3
+
+        Horizontal Rules (ignore)
+
+        ---
+
+        ===
+
+        #### ATX H1
+
+        ##### ATX H2
+
+        ###### ATX H3
+
+        ####### ATX H4
+
+        ######## ATX H5
+
+        ######### ATX H6
+
+        Stuff
+
+        More stuff
+        more stuff agains
+        """