func (t *DiskManagerSuite) TestSharedToolsDir(c *gc.C) {
	manager := tools.NewDiskManager("/var/lib/juju")
	dir := manager.SharedToolsDir(version.MustParseBinary("1.2.3-precise-amd64"))
	c.Assert(dir, gc.Equals, "/var/lib/juju/tools/1.2.3-precise-amd64")
}
func (s *DiskManagerSuite) SetUpTest(c *gc.C) {
	s.LoggingSuite.SetUpTest(c)
	s.dataDir = c.MkDir()
	s.manager = tools.NewDiskManager(s.dataDir)
}