'The C{_formatRoot} method formats a C{Tag} with filename information
using the filename, line, column, and tag information'

def test_formatRootTagWithFilename(self):

    e = self.makeFlattenerError()
    t = Tag('a-tag', filename='tpl.py', lineNumber=10, columnNumber=20)
    self.assertEqual(e._formatRoot(t), 'File    "tpl.py",    line    10,    column    20,    in    "a-tag"')
