[Security Solution][Lists] - Fix exception list with comments import bug (#124909)

### Summary

Addresses https://github.com/elastic/kibana/issues/124742

#### Issue TLDR
Import of rules that reference exception items with comments fail. Failure message states that comments cannot include `created_at`, `created_by`, `id`.

packages/kbn-securitysolution-io-ts-list-types/src/common/default_import_comments_array/index.test.ts

@@ -0,0 +1,87 @@
+/*
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the Elastic License
+ * 2.0 and the Server Side Public License, v 1; you may not use this file except
+ * in compliance with, at your election, the Elastic License 2.0 or the Server
+ * Side Public License, v 1.
+ */
+
+import { pipe } from 'fp-ts/lib/pipeable';
+import { left } from 'fp-ts/lib/Either';
+import { foldLeftRight, getPaths } from '@kbn/securitysolution-io-ts-utils';
+import { ImportCommentsArray } from '../import_comment';
+import { DefaultImportCommentsArray } from '../default_import_comments_array';
+import { getCommentsArrayMock } from '../comment/index.mock';
+import { getCreateCommentsArrayMock } from '../create_comment/index.mock';
+
+describe('default_import_comments_array', () => {
+  test('it should pass validation when supplied an empty array', () => {
+    const payload: ImportCommentsArray = [];
+    const decoded = DefaultImportCommentsArray.decode(payload);
+    const message = pipe(decoded, foldLeftRight);
+
+    expect(getPaths(left(message.errors))).toEqual([]);
+    expect(message.schema).toEqual(payload);
+  });
+
+  test('it should pass validation when supplied an array of comments', () => {
+    const payload: ImportCommentsArray = getCommentsArrayMock();
+    const decoded = DefaultImportCommentsArray.decode(payload);
+    const message = pipe(decoded, foldLeftRight);
+
+    expect(getPaths(left(message.errors))).toEqual([]);
+    expect(message.schema).toEqual(payload);
+  });
+
+  test('it should pass validation when supplied an array of new comments', () => {
+    const payload: ImportCommentsArray = getCreateCommentsArrayMock();
+    const decoded = DefaultImportCommentsArray.decode(payload);
+    const message = pipe(decoded, foldLeftRight);
+
+    expect(getPaths(left(message.errors))).toEqual([]);
+    expect(message.schema).toEqual(payload);
+  });
+
+  test('it should pass validation when supplied an array of new and existing comments', () => {
+    const payload: ImportCommentsArray = [
+      ...getCommentsArrayMock(),
+      ...getCreateCommentsArrayMock(),
+    ];
+    const decoded = DefaultImportCommentsArray.decode(payload);
+    const message = pipe(decoded, foldLeftRight);
+
+    expect(getPaths(left(message.errors))).toEqual([]);
+    expect(message.schema).toEqual(payload);
+  });
+
+  test('it should fail validation when supplied an array of numbers', () => {
+    const payload = [1];
+    const decoded = DefaultImportCommentsArray.decode(payload);
+    const message = pipe(decoded, foldLeftRight);
+
+    expect(getPaths(left(message.errors))).toEqual([
+      'Invalid value "1" supplied to "DefaultImportComments"',
+    ]);
+    expect(message.schema).toEqual({});
+  });
+
+  test('it should fail validation when supplied an array of strings', () => {
+    const payload = ['some string'];
+    const decoded = DefaultImportCommentsArray.decode(payload);
+    const message = pipe(decoded, foldLeftRight);
+
+    expect(getPaths(left(message.errors))).toEqual([
+      'Invalid value "some string" supplied to "DefaultImportComments"',
+    ]);
+    expect(message.schema).toEqual({});
+  });
+
+  test('it should return a default array entry', () => {
+    const payload = null;
+    const decoded = DefaultImportCommentsArray.decode(payload);
+    const message = pipe(decoded, foldLeftRight);
+
+    expect(getPaths(left(message.errors))).toEqual([]);
+    expect(message.schema).toEqual([]);
+  });
+});

packages/kbn-securitysolution-io-ts-list-types/src/common/default_import_comments_array/index.ts

@@ -0,0 +1,27 @@
+/*
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the Elastic License
+ * 2.0 and the Server Side Public License, v 1; you may not use this file except
+ * in compliance with, at your election, the Elastic License 2.0 or the Server
+ * Side Public License, v 1.
+ */
+
+import * as t from 'io-ts';
+import { Either } from 'fp-ts/lib/Either';
+import { importComment, ImportCommentsArray } from '../import_comment';
+
+/**
+ * Types the DefaultImportCommentsArray as:
+ *   - If null or undefined, then a default array of type ImportCommentsArray will be set
+ */
+export const DefaultImportCommentsArray = new t.Type<
+  ImportCommentsArray,
+  ImportCommentsArray,
+  unknown
+>(
+  'DefaultImportComments',
+  t.array(importComment).is,
+  (input, context): Either<t.Errors, ImportCommentsArray> =>
+    input == null ? t.success([]) : t.array(importComment).validate(input, context),
+  t.identity
+);

packages/kbn-securitysolution-io-ts-list-types/src/common/default_update_comments_array/index.test.ts

@@ -38,7 +38,7 @@ describe('default_update_comments_array', () => {
     const message = pipe(decoded, foldLeftRight);
 
     expect(getPaths(left(message.errors))).toEqual([
-      'Invalid value "1" supplied to "Array<({| comment: NonEmptyString |} & Partial<{| id: NonEmptyString |}>)>"',
+      'Invalid value "1" supplied to "DefaultUpdateComments"',
     ]);
     expect(message.schema).toEqual({});
   });
@@ -49,7 +49,7 @@ describe('default_update_comments_array', () => {
     const message = pipe(decoded, foldLeftRight);
 
     expect(getPaths(left(message.errors))).toEqual([
-      'Invalid value "some string" supplied to "Array<({| comment: NonEmptyString |} & Partial<{| id: NonEmptyString |}>)>"',
+      'Invalid value "some string" supplied to "DefaultUpdateComments"',
     ]);
     expect(message.schema).toEqual({});
   });

packages/kbn-securitysolution-io-ts-list-types/src/common/default_update_comments_array/index.ts

@@ -11,17 +11,17 @@ import { Either } from 'fp-ts/lib/Either';
 import { updateCommentsArray, UpdateCommentsArray } from '../update_comment';
 
 /**
- * Types the DefaultCommentsUpdate as:
- *   - If null or undefined, then a default array of type entry will be set
+ * Types the DefaultUpdateComments as:
+ *   - If null or undefined, then a default array of type UpdateCommentsArray will be set
  */
 export const DefaultUpdateCommentsArray = new t.Type<
   UpdateCommentsArray,
   UpdateCommentsArray,
   unknown
 >(
-  'DefaultCreateComments',
+  'DefaultUpdateComments',
   updateCommentsArray.is,
-  (input): Either<t.Errors, UpdateCommentsArray> =>
-    input == null ? t.success([]) : updateCommentsArray.decode(input),
+  (input, context): Either<t.Errors, UpdateCommentsArray> =>
+    input == null ? t.success([]) : updateCommentsArray.validate(input, context),
   t.identity
 );

packages/kbn-securitysolution-io-ts-list-types/src/common/import_comment/index.test.ts

@@ -0,0 +1,135 @@
+/*
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the Elastic License
+ * 2.0 and the Server Side Public License, v 1; you may not use this file except
+ * in compliance with, at your election, the Elastic License 2.0 or the Server
+ * Side Public License, v 1.
+ */
+
+import { pipe } from 'fp-ts/lib/pipeable';
+import { left } from 'fp-ts/lib/Either';
+import { getCommentsArrayMock, getCommentsMock } from '../comment/index.mock';
+import { getCreateCommentsArrayMock } from '../create_comment/index.mock';
+import {
+  importComment,
+  ImportCommentsArray,
+  importCommentsArray,
+  ImportCommentsArrayOrUndefined,
+  importCommentsArrayOrUndefined,
+} from '.';
+import { foldLeftRight, getPaths } from '@kbn/securitysolution-io-ts-utils';
+
+describe('ImportComment', () => {
+  describe('importComment', () => {
+    test('it passes validation with a typical comment', () => {
+      const payload = getCommentsMock();
+      const decoded = importComment.decode(payload);
+      const message = pipe(decoded, foldLeftRight);
+
+      expect(getPaths(left(message.errors))).toEqual([]);
+      expect(message.schema).toEqual(payload);
+    });
+
+    test('it passes validation with a new comment', () => {
+      const payload = { comment: 'new comment' };
+      const decoded = importComment.decode(payload);
+      const message = pipe(decoded, foldLeftRight);
+
+      expect(getPaths(left(message.errors))).toEqual([]);
+      expect(message.schema).toEqual(payload);
+    });
+
+    test('it fails validation when undefined', () => {
+      const payload = undefined;
+      const decoded = importComment.decode(payload);
+      const message = pipe(decoded, foldLeftRight);
+
+      expect(getPaths(left(message.errors))).toEqual([
+        'Invalid value "undefined" supplied to "(({| comment: NonEmptyString, created_at: string, created_by: string, id: NonEmptyString |} & Partial<{| updated_at: string, updated_by: string |}>) | {| comment: NonEmptyString |})"',
+      ]);
+      expect(message.schema).toEqual({});
+    });
+  });
+
+  describe('importCommentsArray', () => {
+    test('it passes validation an array of Comment', () => {
+      const payload = getCommentsArrayMock();
+      const decoded = importCommentsArray.decode(payload);
+      const message = pipe(decoded, foldLeftRight);
+
+      expect(getPaths(left(message.errors))).toEqual([]);
+      expect(message.schema).toEqual(payload);
+    });
+
+    test('it passes validation an array of CreateComment', () => {
+      const payload = getCreateCommentsArrayMock();
+      const decoded = importCommentsArray.decode(payload);
+      const message = pipe(decoded, foldLeftRight);
+
+      expect(getPaths(left(message.errors))).toEqual([]);
+      expect(message.schema).toEqual(payload);
+    });
+
+    test('it passes validation an array of Comment and CreateComment', () => {
+      const payload = [...getCommentsArrayMock(), ...getCreateCommentsArrayMock()];
+      const decoded = importCommentsArray.decode(payload);
+      const message = pipe(decoded, foldLeftRight);
+
+      expect(getPaths(left(message.errors))).toEqual([]);
+      expect(message.schema).toEqual(payload);
+    });
+
+    test('it fails validation when undefined', () => {
+      const payload = undefined;
+      const decoded = importCommentsArray.decode(payload);
+      const message = pipe(decoded, foldLeftRight);
+
+      expect(getPaths(left(message.errors))).toEqual([
+        'Invalid value "undefined" supplied to "Array<(({| comment: NonEmptyString, created_at: string, created_by: string, id: NonEmptyString |} & Partial<{| updated_at: string, updated_by: string |}>) | {| comment: NonEmptyString |})>"',
+      ]);
+      expect(message.schema).toEqual({});
+    });
+
+    test('it fails validation when array includes non ImportComment types', () => {
+      const payload = [1] as unknown as ImportCommentsArray;
+      const decoded = importCommentsArray.decode(payload);
+      const message = pipe(decoded, foldLeftRight);
+
+      expect(getPaths(left(message.errors))).toEqual([
+        'Invalid value "1" supplied to "Array<(({| comment: NonEmptyString, created_at: string, created_by: string, id: NonEmptyString |} & Partial<{| updated_at: string, updated_by: string |}>) | {| comment: NonEmptyString |})>"',
+      ]);
+      expect(message.schema).toEqual({});
+    });
+  });
+
+  describe('importCommentsArrayOrUndefined', () => {
+    test('it passes validation an array of ImportComment', () => {
+      const payload = [...getCommentsArrayMock(), ...getCreateCommentsArrayMock()];
+      const decoded = importCommentsArrayOrUndefined.decode(payload);
+      const message = pipe(decoded, foldLeftRight);
+
+      expect(getPaths(left(message.errors))).toEqual([]);
+      expect(message.schema).toEqual(payload);
+    });
+
+    test('it passes validation when undefined', () => {
+      const payload = undefined;
+      const decoded = importCommentsArrayOrUndefined.decode(payload);
+      const message = pipe(decoded, foldLeftRight);
+
+      expect(getPaths(left(message.errors))).toEqual([]);
+      expect(message.schema).toEqual(payload);
+    });
+
+    test('it fails validation when array includes non ImportComment types', () => {
+      const payload = [1] as unknown as ImportCommentsArrayOrUndefined;
+      const decoded = importCommentsArray.decode(payload);
+      const message = pipe(decoded, foldLeftRight);
+
+      expect(getPaths(left(message.errors))).toEqual([
+        'Invalid value "1" supplied to "Array<(({| comment: NonEmptyString, created_at: string, created_by: string, id: NonEmptyString |} & Partial<{| updated_at: string, updated_by: string |}>) | {| comment: NonEmptyString |})>"',
+      ]);
+      expect(message.schema).toEqual({});
+    });
+  });
+});

packages/kbn-securitysolution-io-ts-list-types/src/common/import_comment/index.ts

@@ -0,0 +1,19 @@
+/*
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the Elastic License
+ * 2.0 and the Server Side Public License, v 1; you may not use this file except
+ * in compliance with, at your election, the Elastic License 2.0 or the Server
+ * Side Public License, v 1.
+ */
+
+import * as t from 'io-ts';
+import { createComment } from '../create_comment';
+import { comment } from '../comment';
+
+export const importComment = t.union([comment, createComment]);
+
+export type ImportComment = t.TypeOf<typeof importComment>;
+export const importCommentsArray = t.array(importComment);
+export type ImportCommentsArray = t.TypeOf<typeof importCommentsArray>;
+export const importCommentsArrayOrUndefined = t.union([importCommentsArray, t.undefined]);
+export type ImportCommentsArrayOrUndefined = t.TypeOf<typeof importCommentsArrayOrUndefined>;

packages/kbn-securitysolution-io-ts-list-types/src/common/index.ts

@@ -13,6 +13,7 @@ export * from './created_by';
 export * from './cursor';
 export * from './default_namespace';
 export * from './default_namespace_array';
+export * from './default_import_comments_array';
 export * from './description';
 export * from './deserializer';
 export * from './endpoint';
@@ -29,6 +30,7 @@ export * from './exception_list_item_type';
 export * from './filter';
 export * from './id';
 export * from './immutable';
+export * from './import_comment';
 export * from './item_id';
 export * from './list_id';
 export * from './list_operator';

packages/kbn-securitysolution-io-ts-list-types/src/common/update_comment/index.test.ts

@@ -19,7 +19,7 @@ import {
 } from '.';
 import { foldLeftRight, getPaths } from '@kbn/securitysolution-io-ts-utils';
 
-describe('CommentsUpdate', () => {
+describe('UpdateComment', () => {
   describe('updateComment', () => {
     test('it should pass validation when supplied typical comment update', () => {
       const payload = getUpdateCommentMock();

packages/kbn-securitysolution-io-ts-list-types/src/request/import_exception_item_schema/index.test.ts

@@ -15,6 +15,7 @@ import {
   getImportExceptionsListItemSchemaDecodedMock,
   getImportExceptionsListItemSchemaMock,
 } from './index.mock';
+import { getCommentsArrayMock } from '../../common/comment/index.mock';
 
 describe('import_list_item_schema', () => {
   test('it should validate a typical item request', () => {
@@ -27,6 +28,35 @@ describe('import_list_item_schema', () => {
     expect(message.schema).toEqual(getImportExceptionsListItemSchemaDecodedMock());
   });
 
+  test('it should validate a typical item request with comments', () => {
+    const payload = {
+      ...getImportExceptionsListItemSchemaMock(),
+      comments: getCommentsArrayMock(),
+    };
+    const decoded = importExceptionListItemSchema.decode(payload);
+    const checked = exactCheck(payload, decoded);
+    const message = pipe(checked, foldLeftRight);
+
+    expect(getPaths(left(message.errors))).toEqual([]);
+    expect(message.schema).toEqual({
+      ...getImportExceptionsListItemSchemaDecodedMock(),
+      comments: [
+        {
+          comment: 'some old comment',
+          created_at: '2020-04-20T15:25:31.830Z',
+          created_by: 'some user',
+          id: 'uuid_here',
+        },
+        {
+          comment: 'some old comment',
+          created_at: '2020-04-20T15:25:31.830Z',
+          created_by: 'some user',
+          id: 'uuid_here',
+        },
+      ],
+    });
+  });
+
   test('it should NOT accept an undefined for "item_id"', () => {
     const payload: Partial<ReturnType<typeof getImportExceptionsListItemSchemaMock>> =
       getImportExceptionsListItemSchemaMock();

packages/kbn-securitysolution-io-ts-list-types/src/request/import_exception_item_schema/index.ts

@@ -29,8 +29,8 @@ import { nonEmptyEntriesArray } from '../../common/non_empty_entries_array';
 import { exceptionListItemType } from '../../common/exception_list_item_type';
 import { ItemId } from '../../common/item_id';
 import { EntriesArray } from '../../common/entries';
-import { CreateCommentsArray } from '../../common/create_comment';
-import { DefaultCreateCommentsArray } from '../../common/default_create_comments_array';
+import { DefaultImportCommentsArray } from '../../common/default_import_comments_array';
+import { ImportCommentsArray } from '../../common';
 
 /**
  * Differences from this and the createExceptionsListItemSchema are
@@ -56,7 +56,7 @@ export const importExceptionListItemSchema = t.intersection([
   t.exact(
     t.partial({
       id, // defaults to undefined if not set during decode
-      comments: DefaultCreateCommentsArray, // defaults to empty array if not set during decode
+      comments: DefaultImportCommentsArray, // defaults to empty array if not set during decode
       created_at, // defaults undefined if not set during decode
       updated_at, // defaults undefined if not set during decode
       created_by, // defaults undefined if not set during decode
@@ -78,7 +78,7 @@ export type ImportExceptionListItemSchemaDecoded = Omit<
   ImportExceptionListItemSchema,
   'tags' | 'item_id' | 'entries' | 'namespace_type' | 'comments'
 > & {
-  comments: CreateCommentsArray;
+  comments: ImportCommentsArray;
   tags: Tags;
   item_id: ItemId;
   entries: EntriesArray;

x-pack/plugins/lists/server/services/exception_lists/utils/import/create_exceptions_stream_logic.test.ts

@@ -24,6 +24,7 @@ import { PromiseStream } from '../../import_exception_list_and_items';
 import {
   createExceptionsStreamFromNdjson,
   exceptionsChecksFromArray,
+  manageExceptionComments,
 } from './create_exceptions_stream_logic';
 
 describe('create_exceptions_stream_logic', () => {
@@ -338,4 +339,49 @@ describe('create_exceptions_stream_logic', () => {
       });
     });
   });
+
+  describe('manageExceptionComments', () => {
+    test('returns empty array if passed in "comments" undefined', () => {
+      const result = manageExceptionComments(undefined);
+      expect(result).toEqual([]);
+    });
+
+    test('returns empty array if passed in "comments" empty array', () => {
+      const result = manageExceptionComments([]);
+      expect(result).toEqual([]);
+    });
+
+    test('returns formatted existing comment', () => {
+      const result = manageExceptionComments([
+        {
+          comment: 'some old comment',
+          created_at: '2020-04-20T15:25:31.830Z',
+          created_by: 'kibana',
+          id: 'uuid_here',
+          updated_at: '2020-05-20T15:25:31.830Z',
+          updated_by: 'lily',
+        },
+      ]);
+
+      expect(result).toEqual([
+        {
+          comment: 'some old comment',
+        },
+      ]);
+    });
+
+    test('returns formatted new comment', () => {
+      const result = manageExceptionComments([
+        {
+          comment: 'some new comment',
+        },
+      ]);
+
+      expect(result).toEqual([
+        {
+          comment: 'some new comment',
+        },
+      ]);
+    });
+  });
 });

x-pack/plugins/lists/server/services/exception_lists/utils/import/create_exceptions_stream_logic.ts

@@ -12,7 +12,9 @@ import { has } from 'lodash/fp';
 import { pipe } from 'fp-ts/lib/pipeable';
 import { fold } from 'fp-ts/lib/Either';
 import {
+  CreateCommentsArray,
   ExportExceptionDetails,
+  ImportCommentsArray,
   ImportExceptionListItemSchema,
   ImportExceptionListItemSchemaDecoded,
   ImportExceptionListSchemaDecoded,
@@ -120,6 +122,24 @@ export const sortExceptionsStream = (): Transform => {
   );
 };
 
+/**
+ * Updates any comments associated with exception items to resemble
+ * comment creation schema.
+ * See issue for context https://github.com/elastic/kibana/issues/124742#issuecomment-1033082093
+ * @returns {array} comments reformatted properly for import
+ */
+export const manageExceptionComments = (
+  comments: ImportCommentsArray | undefined
+): CreateCommentsArray => {
+  if (comments == null || !comments.length) {
+    return [];
+  } else {
+    return comments.map(({ comment }) => ({
+      comment,
+    }));
+  }
+};
+
 /**
  *
  * Validating exceptions logic
@@ -206,8 +226,9 @@ export const validateExceptionsItems = (
 
   return items.map((item: ImportExceptionListItemSchema | Error) => {
     if (!(item instanceof Error)) {
-      const decodedItem = importExceptionListItemSchema.decode(item);
-      const checkedItem = exactCheck(item, decodedItem);
+      const itemWithUpdatedComments = { ...item, comments: manageExceptionComments(item.comments) };
+      const decodedItem = importExceptionListItemSchema.decode(itemWithUpdatedComments);
+      const checkedItem = exactCheck(itemWithUpdatedComments, decodedItem);
 
       return pipe(checkedItem, fold(onLeft, onRight));
     } else {

x-pack/test/detection_engine_api_integration/security_and_spaces/tests/import_export_rules.ts

@@ -0,0 +1,126 @@
+/*
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the Elastic License
+ * 2.0; you may not use this file except in compliance with the Elastic License
+ * 2.0.
+ */
+
+import expect from '@kbn/expect';
+import { EXCEPTION_LIST_ITEM_URL, EXCEPTION_LIST_URL } from '@kbn/securitysolution-list-constants';
+
+import { deleteAllExceptions } from '../../../lists_api_integration/utils';
+import { getCreateExceptionListItemMinimalSchemaMock } from '../../../../plugins/lists/common/schemas/request/create_exception_list_item_schema.mock';
+import { getCreateExceptionListMinimalSchemaMock } from '../../../../plugins/lists/common/schemas/request/create_exception_list_schema.mock';
+import { DETECTION_ENGINE_RULES_URL } from '../../../../plugins/security_solution/common/constants';
+import { FtrProviderContext } from '../../common/ftr_provider_context';
+import {
+  binaryToString,
+  createRule,
+  createSignalsIndex,
+  deleteAllAlerts,
+  deleteSignalsIndex,
+  getSimpleRule,
+} from '../../utils';
+import { ROLES } from '../../../../plugins/security_solution/common/test';
+import { createUserAndRole, deleteUserAndRole } from '../../../common/services/security_solution';
+
+// This test was meant to be more full flow, ensuring that
+// exported rules are able to be reimported as opposed to
+// testing the import/export functionality separately
+// eslint-disable-next-line import/no-default-export
+export default ({ getService }: FtrProviderContext): void => {
+  const supertest = getService('supertest');
+  const supertestWithoutAuth = getService('supertestWithoutAuth');
+  const log = getService('log');
+
+  describe('import_export_rules_flow', () => {
+    beforeEach(async () => {
+      await createSignalsIndex(supertest, log);
+      await createUserAndRole(getService, ROLES.soc_manager);
+    });
+
+    afterEach(async () => {
+      await deleteUserAndRole(getService, ROLES.soc_manager);
+      await deleteAllExceptions(supertest, log);
+      await deleteSignalsIndex(supertest, log);
+      await deleteAllAlerts(supertest, log);
+    });
+
+    it('should be able to reimport a rule referencing an exception list with existing comments', async () => {
+      // create an exception list
+      const { body: exceptionBody } = await supertestWithoutAuth
+        .post(EXCEPTION_LIST_URL)
+        .auth(ROLES.soc_manager, 'changeme')
+        .set('kbn-xsrf', 'true')
+        .send(getCreateExceptionListMinimalSchemaMock())
+        .expect(200);
+
+      // create an exception list item
+      const { body: exceptionItemBody } = await supertestWithoutAuth
+        .post(EXCEPTION_LIST_ITEM_URL)
+        .auth(ROLES.soc_manager, 'changeme')
+        .set('kbn-xsrf', 'true')
+        .send({
+          ...getCreateExceptionListItemMinimalSchemaMock(),
+          comments: [{ comment: 'this exception item rocks' }],
+        })
+        .expect(200);
+
+      const { body: exceptionItem } = await supertest
+        .get(`${EXCEPTION_LIST_ITEM_URL}?item_id=${exceptionItemBody.item_id}`)
+        .set('kbn-xsrf', 'true')
+        .expect(200);
+
+      expect(exceptionItem.comments).to.eql([
+        {
+          comment: 'this exception item rocks',
+          created_at: `${exceptionItem.comments[0].created_at}`,
+          created_by: 'soc_manager',
+          id: `${exceptionItem.comments[0].id}`,
+        },
+      ]);
+
+      await createRule(supertest, log, {
+        ...getSimpleRule(),
+        exceptions_list: [
+          {
+            id: exceptionBody.id,
+            list_id: exceptionBody.list_id,
+            type: exceptionBody.type,
+            namespace_type: exceptionBody.namespace_type,
+          },
+        ],
+      });
+
+      const { body } = await supertest
+        .post(`${DETECTION_ENGINE_RULES_URL}/_export`)
+        .set('kbn-xsrf', 'true')
+        .send()
+        .expect(200)
+        .parse(binaryToString);
+
+      await supertest
+        .post(`${DETECTION_ENGINE_RULES_URL}/_import?overwrite=true&overwrite_exceptions=true`)
+        .set('kbn-xsrf', 'true')
+        .attach('file', Buffer.from(body), 'rules.ndjson')
+        .expect(200);
+
+      const { body: exceptionItemFind2 } = await supertest
+        .get(`${EXCEPTION_LIST_ITEM_URL}?item_id=${exceptionItemBody.item_id}`)
+        .set('kbn-xsrf', 'true')
+        .expect(200);
+
+      // NOTE: Existing comment is uploaded successfully
+      // however, the meta now reflects who imported it,
+      // not who created the initial comment
+      expect(exceptionItemFind2.comments).to.eql([
+        {
+          comment: 'this exception item rocks',
+          created_at: `${exceptionItemFind2.comments[0].created_at}`,
+          created_by: 'elastic',
+          id: `${exceptionItemFind2.comments[0].id}`,
+        },
+      ]);
+    });
+  });
+};

x-pack/test/detection_engine_api_integration/security_and_spaces/tests/import_rules.ts

@@ -7,7 +7,7 @@
 
 import expect from '@kbn/expect';
 
-import { EXCEPTION_LIST_URL } from '@kbn/securitysolution-list-constants';
+import { EXCEPTION_LIST_ITEM_URL, EXCEPTION_LIST_URL } from '@kbn/securitysolution-list-constants';
 import { getCreateExceptionListMinimalSchemaMock } from '../../../../plugins/lists/common/schemas/request/create_exception_list_schema.mock';
 import { DETECTION_ENGINE_RULES_URL } from '../../../../plugins/security_solution/common/constants';
 import { FtrProviderContext } from '../../common/ftr_provider_context';
@@ -831,7 +831,33 @@ export default ({ getService }: FtrProviderContext): void => {
                     type: 'detection',
                     namespace_type: 'single',
                   },
-                  getImportExceptionsListItemSchemaMock('test_item_id', 'i_exist'),
+                  {
+                    description: 'some description',
+                    entries: [
+                      {
+                        entries: [
+                          {
+                            field: 'nested.field',
+                            operator: 'included',
+                            type: 'match',
+                            value: 'some value',
+                          },
+                        ],
+                        field: 'some.parentField',
+                        type: 'nested',
+                      },
+                      {
+                        field: 'some.not.nested.field',
+                        operator: 'included',
+                        type: 'match',
+                        value: 'some value',
+                      },
+                    ],
+                    item_id: 'item_id_1',
+                    list_id: 'i_exist',
+                    name: 'Query with a rule id',
+                    type: 'simple',
+                  },
                 ])
               ),
               'rules.ndjson'
@@ -871,6 +897,135 @@ export default ({ getService }: FtrProviderContext): void => {
             exceptions_success_count: 2,
           });
         });
+
+        it('should resolve exception references that include comments', async () => {
+          // So importing a rule that references an exception list
+          // Keep in mind, no exception lists or rules exist yet
+          const simpleRule: ReturnType<typeof getSimpleRule> = {
+            ...getSimpleRule('rule-1'),
+            exceptions_list: [
+              {
+                id: 'abc',
+                list_id: 'i_exist',
+                type: 'detection',
+                namespace_type: 'single',
+              },
+            ],
+          };
+
+          // Importing the "simpleRule", along with the exception list
+          // it's referencing and the list's item
+          const { body } = await supertest
+            .post(`${DETECTION_ENGINE_RULES_URL}/_import`)
+            .set('kbn-xsrf', 'true')
+            .attach(
+              'file',
+              Buffer.from(
+                toNdJsonString([
+                  simpleRule,
+                  {
+                    ...getImportExceptionsListSchemaMock('i_exist'),
+                    id: 'abc',
+                    type: 'detection',
+                    namespace_type: 'single',
+                  },
+                  {
+                    comments: [
+                      {
+                        comment: 'This is an exception to the rule',
+                        created_at: '2022-02-04T02:27:40.938Z',
+                        created_by: 'elastic',
+                        id: '845fc456-91ff-4530-bcc1-5b7ebd2f75b5',
+                      },
+                      {
+                        comment: 'I decided to add a new comment',
+                      },
+                    ],
+                    description: 'some description',
+                    entries: [
+                      {
+                        entries: [
+                          {
+                            field: 'nested.field',
+                            operator: 'included',
+                            type: 'match',
+                            value: 'some value',
+                          },
+                        ],
+                        field: 'some.parentField',
+                        type: 'nested',
+                      },
+                      {
+                        field: 'some.not.nested.field',
+                        operator: 'included',
+                        type: 'match',
+                        value: 'some value',
+                      },
+                    ],
+                    item_id: 'item_id_1',
+                    list_id: 'i_exist',
+                    name: 'Query with a rule id',
+                    type: 'simple',
+                  },
+                ])
+              ),
+              'rules.ndjson'
+            )
+            .expect(200);
+
+          const { body: ruleResponse } = await supertest
+            .get(`${DETECTION_ENGINE_RULES_URL}?rule_id=rule-1`)
+            .send()
+            .expect(200);
+          const bodyToCompare = removeServerGeneratedProperties(ruleResponse);
+          const referencedExceptionList = ruleResponse.exceptions_list[0];
+
+          // create an exception list
+          const { body: exceptionBody } = await supertest
+            .get(
+              `${EXCEPTION_LIST_URL}?list_id=${referencedExceptionList.list_id}&id=${referencedExceptionList.id}`
+            )
+            .set('kbn-xsrf', 'true')
+            .expect(200);
+
+          expect(bodyToCompare.exceptions_list).to.eql([
+            {
+              id: exceptionBody.id,
+              list_id: 'i_exist',
+              namespace_type: 'single',
+              type: 'detection',
+            },
+          ]);
+
+          const { body: exceptionItemBody } = await supertest
+            .get(`${EXCEPTION_LIST_ITEM_URL}?item_id="item_id_1"`)
+            .set('kbn-xsrf', 'true')
+            .expect(200);
+
+          expect(exceptionItemBody.comments).to.eql([
+            {
+              comment: 'This is an exception to the rule',
+              created_at: `${exceptionItemBody.comments[0].created_at}`,
+              created_by: 'elastic',
+              id: `${exceptionItemBody.comments[0].id}`,
+            },
+            {
+              comment: 'I decided to add a new comment',
+              created_at: `${exceptionItemBody.comments[1].created_at}`,
+              created_by: 'elastic',
+              id: `${exceptionItemBody.comments[1].id}`,
+            },
+          ]);
+
+          expect(body).to.eql({
+            success: true,
+            success_count: 1,
+            errors: [],
+            exceptions_errors: [],
+            exceptions_success: true,
+            exceptions_success_count: 2,
+          });
+        });
       });
     });
   });

x-pack/test/detection_engine_api_integration/security_and_spaces/tests/index.ts

@@ -33,6 +33,7 @@ export default ({ loadTestFile }: FtrProviderContext): void => {
       loadTestFile(require.resolve('./generating_signals'));
       loadTestFile(require.resolve('./get_prepackaged_rules_status'));
       loadTestFile(require.resolve('./import_rules'));
+      loadTestFile(require.resolve('./import_export_rules'));
       loadTestFile(require.resolve('./read_rules'));
       loadTestFile(require.resolve('./resolve_read_rules'));
       loadTestFile(require.resolve('./update_rules'));

x-pack/test/detection_engine_api_integration/utils.ts

@@ -1043,8 +1043,8 @@ export const countDownTest = async (
  * and error about the race condition.
  * rule a second attempt. It only re-tries adding the rule if it encounters a conflict once.
  * @param supertest The supertest deps
- * @param rule The rule to create
  * @param log The tooling logger
+ * @param rule The rule to create
  */
 export const createRule = async (
   supertest: SuperTest.SuperTest<SuperTest.Test>,