Confirm that mock-fs works if another file requires fs-extra first

package.json

@@ -34,6 +34,7 @@
     "chai": "3.5.0",
     "eslint": "2.13.0",
     "eslint-config-tschaub": "5.0.0",
+    "fs-extra": "^0.30.0",
     "mocha": "2.5.2",
     "rimraf": "2.5.2"
   },

test/integration/A.spec.js

@@ -0,0 +1,15 @@
+/**
+ * This test is here so that fs-extra is required before mock-fs in the
+ * B.spec.js file.
+ *
+ * See https://github.com/tschaub/mock-fs/issues/103
+ */
+
+var assert = require('../helper').assert;
+var fs = require('fs-extra');
+
+describe('Dummy test A', function() {
+  it('should pass', function() {
+    assert.equal(typeof fs, 'object');
+  });
+});

test/integration/B.spec.js

@@ -0,0 +1,28 @@
+/**
+ * The A.spec.js file requires fs-extra before this one.  Here we confirm that
+ * mock-fs still works even if fs-extra was required elsewhere first.
+ *
+ * See https://github.com/tschaub/mock-fs/issues/103
+ */
+
+var assert = require('../helper').assert;
+var mock = require('../../lib/index');
+var fs = require('fs-extra');
+
+describe('Dummy test B', function() {
+  before(function() {
+    mock({
+      folder: {}
+    });
+  });
+
+  after(function() {
+    mock.restore();
+  });
+
+  it('should read mocked directory', function() {
+    var content = fs.readdirSync('folder');
+    assert.isArray(content);
+  });
+
+});