def test_varsTree_unordered(self) :
		theVars = [
			'nice',
			'far',
			'boo',
			]
		yaml = yamlns._varsTree(theVars).dump()
		self.assertEqual(yaml,
			'boo: \'\'\n'
			'far: \'\'\n'
			'nice: \'\'\n'
			)
	def test_varsTree_unordered(self) :
		theVars = [
			'nice',
			'far',
			'boo',
			]
		yaml = yamlns._varsTree(theVars).dump()
		self.assertEqual(yaml,
			'boo: \'\'\n'
			'far: \'\'\n'
			'nice: \'\'\n'
			)
	def test_varsTree_withSubVars(self) :
		theVars = [
			'upper.boo',
			'upper.far',
			'upper.nice',
			]
		yaml = yamlns._varsTree(theVars).dump()
		self.assertEqual(yaml,
			'upper:\n'
			'  boo: \'\'\n'
			'  far: \'\'\n'
			'  nice: \'\'\n'
			)
	def test_varsTree_withSubVars(self) :
		theVars = [
			'upper.boo',
			'upper.far',
			'upper.nice',
			]
		yaml = yamlns._varsTree(theVars).dump()
		self.assertEqual(yaml,
			'upper:\n'
			'  boo: \'\'\n'
			'  far: \'\'\n'
			'  nice: \'\'\n'
			)