Merge pull request #1549 from cucumber/bugfix/enable_tagged_rules

Update rule feature to test using tags

Author: luke-hill

features/docs/gherkin/rule.feature

@@ -9,7 +9,6 @@ Feature: Rule
       Feature: Rule Sample
 
         Rule: This is a rule
-
           Example: First example
             Given some context
             When I do an action
@@ -20,9 +19,9 @@ Feature: Rule
             When I do another action
             Then some other results should be there
 
-        Rule: This is a second rule
-
-          Example: First example
+        @rule2_tag
+        Rule: This is a second rule with a tag
+          Example: Third example
             Given some other context
             When I do another action
             Then some results should be there
@@ -38,7 +37,6 @@ Feature: Rule
 
       """
 
-
   Rule: I use Gherkin 6+
     Example: I can use the Rule keyword
       When I run `cucumber -q features/rule.feature`
@@ -56,11 +54,27 @@ Feature: Rule
           When I do another action
           Then some other results should be there
 
-        Example: First example
+        Example: Third example
           Given some other context
           When I do another action
           Then some results should be there
 
       3 scenarios (3 passed)
       9 steps (9 passed)
       """
+
+  Rule: Filtering
+    Example: I can filter on tagged rules using the CLI
+      When I run `cucumber -q -t @rule2_tag`
+      Then it should pass with exactly:
+      """
+      Feature: Rule Sample
+
+        Example: Third example
+          Given some other context
+          When I do another action
+          Then some results should be there
+
+      1 scenario (1 passed)
+      3 steps (3 passed)
+      """