Add teardown support for doc tests (#70831)

This adds named `teardown` support for doc tests similar to its support
for named `setup` section. This is useful when many doc files want to
share a similar `setup` AND `teardown`. I've introduced an example of
this in the CCR docs just to prove its works. We expect we'll use it for
datastreams as well.

Closes #70830

Co-authored-by: James Rodewig <40268737+jrodewig@users.noreply.github.com>

buildSrc/src/main/groovy/org/elasticsearch/gradle/doc/RestTestsFromSnippetsTask.groovy

@@ -31,9 +31,20 @@ class RestTestsFromSnippetsTask extends SnippetsTask {
      */
     private static final List BAD_LANGUAGES = ['json', 'javascript']
 
+    /**
+     * Test setups defined in the build instead of the docs so they can be
+     * shared between many doc files.
+     */
     @Input
     Map<String, String> setups = new HashMap()
 
+    /**
+     * Test teardowns defined in the build instead of the docs so they can be
+     * shared between many doc files.
+     */
+    @Input
+    Map<String, String> teardowns = new HashMap()
+
     /**
      * A list of files that contain snippets that *probably* should be
      * converted to `// CONSOLE` but have yet to be converted. If a file is in
@@ -281,19 +292,40 @@ class RestTestsFromSnippetsTask extends SnippetsTask {
             }
 
             body(test, false)
+
+            if (test.teardown != null) {
+                teardown(test)
+            }
         }
 
         private void setup(final Snippet snippet) {
             // insert a setup defined outside of the docs
-            for (final String setupName : snippet.setup.split(',')) {
+            for (final String name : snippet.setup.split(',')) {
-                final String setup = setups[setupName]
+                final String setup = setups[name]
                 if (setup == null) {
-                    throw new InvalidUserDataException("Couldn't find setup for $snippet")
+                    throw new InvalidUserDataException(
+                        "Couldn't find named setup $name for $snippet"
+                    )
                 }
+                current.println("# Named setup ${name}")
                 current.println(setup)
             }
         }
 
+        private void teardown(final Snippet snippet) {
+            // insert a teardown defined outside of the docs
+            for (final String name : snippet.teardown.split(',')) {
+                final String teardown = teardowns[name]
+                if (teardown == null) {
+                    throw new InvalidUserDataException(
+                        "Couldn't find named teardown $name for $snippet"
+                    )
+                }
+                current.println("# Named teardown ${name}")
+                current.println(teardown)
+            }
+        }
+
         private void response(Snippet response) {
             if (null == response.skip) {
                 current.println("  - match: ")

buildSrc/src/main/groovy/org/elasticsearch/gradle/doc/SnippetsTask.groovy

@@ -32,10 +32,11 @@ class SnippetsTask extends DefaultTask {
     private static final String CATCH = /catch:\s*((?:\/[^\/]+\/)|[^ \]]+)/
     private static final String SKIP = /skip:([^\]]+)/
     private static final String SETUP = /setup:([^ \]]+)/
+    private static final String TEARDOWN = /teardown:([^ \]]+)/
     private static final String WARNING = /warning:(.+)/
     private static final String NON_JSON = /(non_json)/
     private static final String TEST_SYNTAX =
-        /(?:$CATCH|$SUBSTITUTION|$SKIP|(continued)|$SETUP|$WARNING|(skip_shard_failures)) ?/
+        /(?:$CATCH|$SUBSTITUTION|$SKIP|(continued)|$SETUP|$TEARDOWN|$WARNING|(skip_shard_failures)) ?/
 
     /**
      * Action to take on each snippet. Called with a single parameter, an
@@ -226,10 +227,14 @@ class SnippetsTask extends DefaultTask {
                                 return
                             }
                             if (it.group(7) != null) {
-                                snippet.warnings.add(it.group(7))
+                                snippet.teardown = it.group(7)
                                 return
                             }
                             if (it.group(8) != null) {
+                                snippet.warnings.add(it.group(8))
+                                return
+                            }
+                            if (it.group(9) != null) {
                                 snippet.skipShardsFailures = true
                                 return
                             }
@@ -341,6 +346,7 @@ class SnippetsTask extends DefaultTask {
         String language = null
         String catchPart = null
         String setup = null
+        String teardown = null
         boolean curl
         List warnings = new ArrayList()
         boolean skipShardsFailures = false
@@ -372,6 +378,9 @@ class SnippetsTask extends DefaultTask {
                 if (setup) {
                     result += "[setup:$setup]"
                 }
+                if (teardown) {
+                    result += "[teardown:$teardown]"
+                }
                 for (String warning in warnings) {
                     result += "[warning:$warning]"
                 }

docs/README.asciidoc

@@ -79,9 +79,13 @@ used for its modifiers:
   considered tests anyway but this is useful for explicitly documenting the
   reason why the test shouldn't be run.
   * `// TEST[setup:name]`: Run some setup code before running the snippet. This
-  is useful for creating and populating indexes used in the snippet. The setup
+  is useful for creating and populating indexes used in the snippet. The `name`
-  code is defined in `docs/build.gradle`. See `// TESTSETUP` below for a
+  is split on `,` and looked up in the `setups` defined in `docs/build.gradle`.
-  similar feature.
+  See `// TESTSETUP` below for a similar feature.
+  * `// TEST[teardown:name]`: Run some teardown code after the snippet.
+  This is useful for performing hidden cleanup, such as deleting index templates. The
+  `name` is split on `,` and looked up in the `teardowns` defined in
+  `docs/build.gradle`. See `// TESTSETUP` below for a similar feature.
   * `// TEST[warning:some warning]`: Expect the response to include a `Warning`
   header. If the response doesn't include a `Warning` header with the exact
   text then the test fails. If the response includes `Warning` headers that

docs/build.gradle

@@ -1295,6 +1295,30 @@ setups['remote_cluster_and_leader_index'] = setups['remote_cluster'] + '''
             index.soft_deletes.enabled: true
 '''
 
+setups['remote_cluster_and_leader_index_and_follower_index'] = setups['remote_cluster_and_leader_index'] + '''
+  - do:
+      raw:
+        method: PUT
+        path: 'follower_index/_ccr/follow'
+        wait_for_active_shards: 1
+        body: |
+          {
+            "remote_cluster" : "remote_cluster",
+            "leader_index" : "leader_index"
+          }
+  - is_true: follow_index_created
+  - is_true: follow_index_shards_acked
+  - is_true: index_following_started
+'''
+
+teardowns['pause_follow'] = '''
+  - do:
+      raw:
+        method: POST
+        path: 'follower_index/_ccr/pause_follow'
+  - is_true: acknowledged
+'''
+
 setups['seats'] = '''
   - do:
         indices.create:

docs/reference/ccr/managing.asciidoc

@@ -1,27 +1,6 @@
 [role="xpack"]
 [testenv="platinum"]
 
-//////////////////////////
-
-[source,console]
---------------------------------------------------
-PUT /follower_index/_ccr/follow?wait_for_active_shards=1
-{
-  "remote_cluster" : "remote_cluster",
-  "leader_index" : "leader_index"
-}
---------------------------------------------------
-// TESTSETUP
-// TEST[setup:remote_cluster_and_leader_index]
-
-[source,console]
---------------------------------------------------
-POST /follower_index/_ccr/pause_follow
---------------------------------------------------
-// TEARDOWN
-
-//////////////////////////
-
 [[ccr-managing]]
 === Manage {ccr}
 Use the following information to manage {ccr} tasks, such as inspecting
@@ -135,6 +114,7 @@ PUT /follower_index/_ccr/follow?wait_for_active_shards=1
   "leader_index" : "leader_index"
 }
 ----------------------------------------------------------------------
+// TEST[setup:remote_cluster_and_leader_index_and_follower_index teardown:pause_follow]
 ====
 
 [[ccr-terminate-replication]]