Add a simple test of the install-nodejs role

Change-Id: Ib0e5e3ffa418827746317d0bdf6196a7b38fc0db

doc/source/test-jobs.rst

@@ -6,4 +6,5 @@ repository.  They are not meant for general consumption and are only
 expected to be run by the OpenDev Zuul.  Generally you can ignore
 these unless you are making changes to the roles in this repository.
 
+.. zuul:autojob:: zuul-jobs-test-install-nodejs
 .. zuul:autojob:: zuul-jobs-test-registry

test-playbooks/simple-role-test.yaml

@@ -0,0 +1,5 @@
+- hosts: all
+  tasks:
+    - name: Include tested role
+      include_role:
+        name: "{{ role_name }}"

zuul.d/test-js-roles-jobs.yaml

@@ -0,0 +1,11 @@
+# Jobs which test roles listed in js-roles.rst
+
+- job:
+    name: zuul-jobs-test-install-nodejs
+    description: Test the install-nodejs role
+    files:
+      - roles/install-nodejs/.*
+    run:
+      test-playbooks/simple-role-test.yaml
+    vars:
+      role_name: install-nodejs