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/fixInternalDocumentLinks.spec.js

@@ -0,0 +1,52 @@
+const testPackage = require('../../helpers/test-package');
+const processorFactory = require('./fixInternalDocumentLinks');
+const Dgeni = require('dgeni');
+
+describe('fixInternalDocumentLinks processor', () => {
+
+  it('should be available on the injector', () => {
+    const dgeni = new Dgeni([testPackage('angular-base-package')]);
+    const injector = dgeni.configureInjector();
+    const processor = injector.get('fixInternalDocumentLinks');
+    expect(processor.$process).toBeDefined();
+  });
+
+  it('should run before the correct processor', () => {
+    const processor = processorFactory();
+    expect(processor.$runBefore).toEqual(['convertToJsonProcessor']);
+  });
+
+  it('should run after the correct processor', () => {
+    const processor = processorFactory();
+    expect(processor.$runAfter).toEqual(['inlineTagProcessor']);
+  });
+
+  it('should prefix internal hash links with the current doc path', () => {
+    const processor = processorFactory();
+    const docs = [
+      {
+        path: 'some/doc',
+        renderedContent: `
+          <a href="http://google.com#q=angular">Google</a>
+          <a href="some/relative/path#some-id">Some Id</a>
+          <a href="#some-internal-id">Link to heading</a>
+          <a class="important" href="#some-internal-id">Link to heading</a>
+          <a href="#some-internal-id" target="_blank">Link to heading</a>
+        `
+      },
+    ];
+    processor.$process(docs);
+    expect(docs).toEqual([
+      {
+        path: 'some/doc',
+        renderedContent: `
+          <a href="http://google.com#q=angular">Google</a>
+          <a href="some/relative/path#some-id">Some Id</a>
+          <a href="some/doc#some-internal-id">Link to heading</a>
+          <a class="important" href="some/doc#some-internal-id">Link to heading</a>
+          <a href="some/doc#some-internal-id" target="_blank">Link to heading</a>
+        `
+      },
+    ]);
+  });
+});