def setUp(self):
self.d = TemporaryDirectory()
fname = os.path.join(self.d.name, 'pubspec.yaml')
with open(fname, 'wt') as f:
f.write(VALID_PUBSPEC_CONTENT)
self.pubspec = PubspecFile.from_path(fname)
self.pub_package = PubPackage(self.pubspec)
