refactor: init cypress-cucumber-preprocessor install.

node_modules/browserify/test/tr_once.js

@@ -0,0 +1,21 @@
+var browserify = require('../');
+var vm = require('vm');
+var test = require('tap').test;
+var through = require('through2');
+var path = require('path');
+
+test('transform exactly once', function (t) {
+    t.plan(3);
+    
+    var b = browserify(__dirname + '/tr_once/main.js', {
+        transform: function (file) {
+        t.equal(file, path.join(__dirname, 'tr_once/main.js') );
+            return through();
+        }
+    });
+    b.bundle(function (err, src) {
+        t.ifError(err);
+        vm.runInNewContext(src, { console: { log: log } });
+        function log (msg) { t.equal(msg, 'wow') }
+    });
+});