Removed the Requirement to Install Python and NodeJS (Now Bundled with Borealis)

Dependencies/Python/Lib/idlelib/idle_test/test_stackviewer.py

@@ -0,0 +1,41 @@
+"Test stackviewer, coverage 63%."
+
+from idlelib import stackviewer
+import unittest
+from test.support import requires
+from tkinter import Tk
+
+from idlelib.tree import TreeNode, ScrolledCanvas
+
+
+class StackBrowserTest(unittest.TestCase):
+
+    @classmethod
+    def setUpClass(cls):
+
+        requires('gui')
+        cls.root = Tk()
+        cls.root.withdraw()
+
+    @classmethod
+    def tearDownClass(cls):
+
+        cls.root.update_idletasks()
+##        for id in cls.root.tk.call('after', 'info'):
+##            cls.root.after_cancel(id)  # Need for EditorWindow.
+        cls.root.destroy()
+        del cls.root
+
+    def test_init(self):
+        try:
+            abc
+        except NameError as exc:
+            sb = stackviewer.StackBrowser(self.root, exc)
+        isi = self.assertIsInstance
+        isi(stackviewer.sc, ScrolledCanvas)
+        isi(stackviewer.item, stackviewer.StackTreeItem)
+        isi(stackviewer.node, TreeNode)
+
+
+if __name__ == '__main__':
+    unittest.main(verbosity=2)