JSCBC-1126: Add mutation token to MutateInResult

Motivation
----------
MutateIn operations should provide a result object that contains a
mutation token.

Changes
-------
Added the mutation token to the MutateInResult object.  Added tests to
verify mutation token is in MutateInResult.

Change-Id: Idfbe0beb43a0e54712f6158daf5b503ce74fbc35
Reviewed-on: https://review.couchbase.org/c/couchnode/+/186442
Tested-by: Jared Casey <jared.casey@couchbase.com>
Reviewed-by: Brett Lawson <brett19@gmail.com>

lib/collection.ts

@@ -1655,6 +1655,7 @@ export class Collection {
             new MutateInResult({
               content: content,
               cas: resp.cas,
+              token: resp.token,
             })
           )
           return

lib/crudoptypes.ts

@@ -234,12 +234,18 @@ export class MutateInResult {
    */
   cas: Cas
 
+  /**
+   * The token representing the mutation performed.
+   */
+  token?: MutationToken
+
   /**
    * @internal
    */
   constructor(data: MutateInResult) {
     this.content = data.content
     this.cas = data.cas
+    this.token = data.token
   }
 }
 

test/crud.test.js

@@ -1252,6 +1252,7 @@ function genericTests(collFn) {
       ])
       assert.isObject(res)
       assert.isOk(res.cas)
+      validateMutationToken(res.token)
 
       assert.isUndefined(res.content[0].error)
       assert.strictEqual(res.content[0].value, 5)
@@ -1311,6 +1312,7 @@ function genericTests(collFn) {
       )
       assert.isObject(res)
       assert.isOk(res.cas)
+      validateMutationToken(res.token)
 
       assert.isUndefined(res.content[0].error)
       assert.strictEqual(res.content[0].value, 5)
@@ -1358,6 +1360,7 @@ function genericTests(collFn) {
       )
       assert.isObject(res)
       assert.isOk(res.cas)
+      validateMutationToken(res.token)
 
       assert.isUndefined(res.content[0].error)
       assert.strictEqual(res.content[0].value, 5)