Issue wp-cli#356 : Improve behat test for new command

features/post-meta.feature

@@ -506,12 +506,19 @@ Feature: Manage post custom fields
       Success: Added custom field.
       """
 
-    When I try the previous command again
+    When I run the previous command again
     Then the return code should be 0
 
-    When I try the previous command again
+    When I run the previous command again
     Then the return code should be 0
 
+    When I run `wp post meta list 1 --keys=foo`
+    Then STDOUT should be a table containing rows:
+      | post_id | meta_key | meta_value |
+      | 1       | foo      | bar        |
+      | 1       | foo      | bar        |
+      | 1       | foo      | bar        |
+
     When I run `wp post meta clean-duplicates 1 foo < session_no`
     # Check for contains only, as the string contains a trailing space.
     Then STDOUT should contain:
@@ -525,6 +532,12 @@ Feature: Manage post custom fields
       Success: Cleaned up duplicate enclosures.
       """
 
+    When I try the previous command again
+    Then STDOUT should contain:
+      """
+      Success: Nothing to clean up: found 1 valid enclosures and 0 duplicate enclosures.
+      """
+
     When I try `wp post meta clean-duplicates 1 food`
     Then STDERR should be:
       """

src/Post_Meta_Command.php

@@ -125,7 +125,9 @@ protected function delete_metadata( $object_id, $meta_key, $meta_value = '' ) {
 	 *
 	 * ## EXAMPLES
 	 *
+	 *     # Delete dulpicate post meta.
 	 *     wp post meta clean-duplicates 1234 enclosure
+	 *     Success: Cleaned up duplicate enclosures.
 	 *
 	 * @subcommand clean-duplicates
 	 */