Add tests for internal modules

Including one broken test related to the #807

Author: Whoaa512

tests/src/rules/order.js

@@ -402,6 +402,54 @@ ruleTester.run('order', rule, {
         },
       ],
     }),
+    // Internal modules
+    test({
+      code: `
+        var path = require('path');
+        var async = require('async');
+        var internalMod = require('internalMods/myMod');
+        var parent = require('../parent');
+        var secondInternalMod = require('~/myMod2');
+        var sibling = require('./foo');
+        var index = require('./');
+      `,
+      options: [{groups: [
+        'builtin',
+        'external',
+        'internal',
+        'parent',
+        'sibling',
+        'index',
+      ]}],
+    }),
+    // Internal modules with newlines
+    test({
+      code: `
+        var path = require('path');
+
+        var async = require('async');
+
+        var internalMod = require('internalMods/myMod');
+        var secondInternalMod = require('~/myMod2');
+
+        var parent = require('../parent');
+
+        var sibling = require('./foo');
+
+        var index = require('./');
+      `,
+      options: [{
+        groups: [
+          'builtin',
+          'external',
+          'internal',
+          'parent',
+          'sibling',
+          'index',
+        ],
+        'newlines-between': 'always',
+      }],
+    }),
   ],
   invalid: [
     // builtin before external module (require)