func (s *filesSuite) TestWriteControllerAddsNewline(c *gc.C) {
err := modelcmd.WriteCurrentController("fubar")
c.Assert(err, jc.ErrorIsNil)
current, err := ioutil.ReadFile(modelcmd.GetCurrentControllerFilePath())
c.Assert(err, jc.ErrorIsNil)
c.Assert(string(current), gc.Equals, "fubar\n")
}
func (s *filesSuite) TestWriteEnvironmentRemovesControllerFile(c *gc.C) {
err := modelcmd.WriteCurrentController("baz")
c.Assert(err, jc.ErrorIsNil)
err = modelcmd.WriteCurrentModel("fubar")
c.Assert(err, jc.ErrorIsNil)
c.Assert(modelcmd.GetCurrentControllerFilePath(), jc.DoesNotExist)
}
func (*filesSuite) TestErrorWritingCurrentController(c *gc.C) {
// Can't write a file over a directory.
os.MkdirAll(modelcmd.GetCurrentControllerFilePath(), 0777)
err := modelcmd.WriteCurrentController("fubar")
c.Assert(err, gc.ErrorMatches, "unable to write to the controller file: .*")
}