Split browser and non-browser targetting js test jobs

Some javascript operations, like running tests for web-apps, need
browsers. Javascript packages that are not targetting browsers
do not.

Make a -browser version that installs the browsers and xvfb, and
a non-browser version that does not.

Change-Id: I33c12cb0d9516bdffef7d8d04af4dbcb03ed8355

doc/source/js-jobs.rst

@@ -6,5 +6,6 @@ Javascript Jobs
 .. zuul:autojob:: build-javascript-deployment-tarball
 .. zuul:autojob:: js-build
 .. zuul:autojob:: nodejs-run-test
+.. zuul:autojob:: nodejs-run-test-browser
 .. zuul:autojob:: nodejs-run-lint
 .. zuul:autojob:: nodejs-run-docs

zuul.d/js-jobs.yaml

@@ -129,6 +129,31 @@
 - job:
     name: nodejs-run-test
     parent: js-build
+    description: |
+      Run test using nodejs.
+
+      Responds to these variables:
+
+      .. zuul:jobvar:: node_version
+         :default: 14
+
+        The version of Node to use.
+
+      .. zuul:jobvar:: zuul_work_dir
+         :default: {{ zuul.project.src_dir }}
+
+         Path to operate in.
+
+      .. zuul:jobvar:: javascript_content_dir
+         :default: dist
+
+         Directory, relative to zuul_work_dir, holding build content.
+    vars:
+      js_build_command: test
+
+- job:
+    name: nodejs-run-test-browser
+    parent: js-build
     description: |
       Run test using nodejs. This test also starts Xvfb for run time
       tests.
@@ -149,7 +174,7 @@
          :default: dist
 
          Directory, relative to zuul_work_dir, holding build content.
-    pre-run: playbooks/javascript/pre-test.yaml
+    pre-run: playbooks/javascript/browser.yaml
     vars:
       js_build_command: test