Add unit tests to verify showHighlights option

karma.config.js

@@ -50,6 +50,7 @@ module.exports = function(config) {
       'h/static/scripts/plugin/heatmap.js',
       'h/static/scripts/vendor/sinon.js',
       'h/static/scripts/vendor/chai.js',
+      'h/static/scripts/hypothesis.js',
       'h/templates/*.html',
       'tests/js/**/*-test.coffee'
     ],

tests/js/host-test.coffee

+assert = chai.assert
+sinon.assert.expose(assert, prefix: '')
+
+describe 'Annotator.Host', ->
+  createHost = (options) ->
+    element = document.createElement('div')
+    return new Annotator.Host(element, options)
+
+  # Disable Annotator's ridiculous logging.
+  before -> sinon.stub(console, 'log')
+  after  -> console.log.restore()
+
+  describe 'options', ->
+    it 'enables highlighting when showHighlights option is provided', (done) ->
+      host = createHost(showHighlights: true)
+      host.on 'panelReady', ->
+        assert.isTrue(host.visibleHighlights)
+        done()
+      host.publish('panelReady')
+
+    it 'does not enable highlighting when no showHighlights option is provided', (done) ->
+      host = createHost({})
+      host.on 'panelReady', ->
+        assert.isFalse(host.visibleHighlights)
+        done()
+      host.publish('panelReady')