Add test for scope tracking features in static-module@3

Author: goto-bus-stop

test/files/scope-sentinel

@@ -0,0 +1 @@
+SCOPE_SENTINEL

test/files/scope.js

@@ -0,0 +1,9 @@
+var fs = require('fs');
+var path = require('path');
+var dynamicallyCreatedFilename = path.join('/files/', 'somefile');
+fs.readFileSync(__dirname + dynamicallyCreatedFilename + __dirname, 'utf8');
+function x (fs) {
+    fs.readFileSync('doesNotExist')
+}
+fs.readFileSync(__dirname + '/scope-sentinel')
+require('fs').readFileSync(__dirname + '/scope-sentinel')

test/scope.js

@@ -0,0 +1,25 @@
+var test = require('tap').test;
+var browserify = require('browserify');
+var path = require('path');
+
+test('scope', function (t) {
+    t.plan(4);
+    
+    var b = browserify({ node: true });
+    b.add(__dirname + '/files/scope');
+    b.transform(path.dirname(__dirname));
+    
+    b.bundle(function (err, src) {
+        if (err) t.fail(err);
+        t.pass('build success');
+        src = src.toString();
+        console.log(src)
+        t.ok(src.indexOf("require('fs')") !== -1, 'kept the require call');
+        var sentinel = new Buffer('SCOPE_SENTINEL\n', 'utf8').toString('base64')
+        var i = src.indexOf(sentinel);
+        t.ok(i !== -1, 'read the file');
+        i = src.indexOf(sentinel, i + 10);
+        t.ok(i !== -1, 'did the require("fs").readFileSync');
+    });
+
+});