Scan all descending directories for index.js with 'create index'; (fixes #2)

tests/findIndexFiles.js

@@ -0,0 +1,20 @@
+import {
+    expect
+} from 'chai';
+
+import path from 'path';
+import glob from 'glob';
+import findIndexFiles from './../src/utilities/findIndexFiles';
+
+const fixturesPath = path.resolve(__dirname, './../../fixtures/find-index-files');
+
+describe('findIndexFiles()', () => {
+    it('finds only the directories that have an existing valid index file', () => {
+        let names;
+
+        names = findIndexFiles(path.resolve(fixturesPath));
+        names = names.sort();
+
+        expect(names).to.deep.equal(glob.sync(path.resolve(fixturesPath, './**/find-*')));
+    });
+});