build(aio): refactor dgeni packages

This is to tidy up the `author-packagse`, which currently duplicates a
lot of the configuration in the main packages. We need to
DRY this up so that we don't fall foul of a change in one being missed in
the other.

aio/tools/transforms/angular-base-package/processors/checkUnbalancedBackTicks.spec.js

@@ -0,0 +1,29 @@
+var testPackage = require('../../helpers/test-package');
+var Dgeni = require('dgeni');
+
+describe('checkUnbalancedBackTicks', function() {
+  var dgeni, injector, processor, log;
+
+  beforeEach(function() {
+    dgeni = new Dgeni([testPackage('angular-base-package')]);
+    injector = dgeni.configureInjector();
+    processor = injector.get('checkUnbalancedBackTicks');
+    log = injector.get('log');
+  });
+
+  it('should warn if there are an odd number of back ticks in the rendered content', function() {
+    var docs = [{
+      renderedContent: '```\n' +
+          'code block\n' +
+          '```\n' +
+          '```\n' +
+          'code block with missing closing back ticks\n'
+    }];
+
+    processor.$process(docs);
+
+    expect(log.warn).toHaveBeenCalledWith(
+        'checkUnbalancedBackTicks processor: unbalanced backticks found in rendered content - doc');
+    expect(docs[0].unbalancedBackTicks).toBe(true);
+  });
+});