Add Fuctional Test for --from-post

Author: sagarnasit

features/post-create-duplicate.feature

@@ -0,0 +1,65 @@
+Feature: Create Duplicate WordPress post from existing posts.
+
+  Background:
+	Given a WP install
+
+  Scenario: Generate duplicate post.
+	When I run `wp term create category "Test Category" --porcelain`
+	Then save STDOUT as {TERM_ID}
+
+	When I run `wp post create --post_title='Test Duplicate Post' --post_category={TERM_ID} --porcelain`
+	And save STDOUT as {POST_ID}
+
+	When I run `wp post create --from-post={POST_ID} --porcelain`
+	Then STDOUT should be a number
+	And save STDOUT as {DUPLICATE_POST_ID}
+
+	When I run `wp post get {DUPLICATE_POST_ID} --field=title`
+	Then STDOUT should be:
+	  """
+	  Test Duplicate Post
+	  """
+
+	When I run `wp post term list {DUPLICATE_POST_ID} category --field=term_id`
+	Then STDOUT should be:
+      """
+      {TERM_ID}
+      """
+
+  Scenario: Generate duplicate post with post metadata.
+	When I run `wp post create --post_title='Test Post' --meta_input='{"key1":"value1","key2":"value2"}' --porcelain`
+	Then save STDOUT as {POST_ID}
+
+	When I run `wp post create --from-post={POST_ID} --porcelain`
+	Then save STDOUT as {DUPLICATE_POST_ID}
+
+	When I run `wp post meta list {DUPLICATE_POST_ID} --format=table`
+	Then STDOUT should be a table containing rows:
+	  | post_id             | meta_key | meta_value |
+	  | {DUPLICATE_POST_ID} | key1     | value1     |
+	  | {DUPLICATE_POST_ID} | key2     | value2     |
+
+  Scenario: Generate duplicate page.
+	When I run `wp post create --post_type="page" --post_title="Test Page" --post_content="Page Content" --porcelain`
+	Then save STDOUT as {POST_ID}
+
+	When I run `wp post create --from-post={POST_ID} --post_title="Duplicate Page" --porcelain`
+	Then save STDOUT as {DUPLICATE_POST_ID}
+
+	When I run `wp post list --post_type='page' --fields="title, content, type"`
+	Then STDOUT should be a table containing rows:
+	  | post_title     | post_content | post_type |
+	  | Test Page      | Page Content | page      |
+	  | Duplicate Page | Page Content | page      |
+
+  Scenario: Change type of duplicate post.
+	When I run `wp post create --post_title='Test Post' --porcelain`
+	Then save STDOUT as {POST_ID}
+
+	When I run `wp post create --from-post={POST_ID} --post_type=page --porcelain`
+	Then save STDOUT as {DUPLICATE_POST_ID}
+
+	When I run `wp post get {DUPLICATE_POST_ID} --fields=type`
+	Then STDOUT should be a table containing rows:
+	  | Field     | Value |
+	  | post_type | page  |