def setUp(self):
        self.case = JavaScriptTestCase()
        try:
            self.case.checkDependencies()
        except NotSupported:
            raise SkipTest("Missing JS dependencies")
Create a L{JavaScriptTestCase} and verify that its dependencies are
dataset/ETHPy150Open twisted/nevow/nevow/test/test_testutil.py/JavaScriptTests.setUp