----------------------------------------------------------------------
FAIL: assign_test.go:286: AssignSuite.TestAssignMachinePrincipalsChange

SetUpTest
[LOG] 0:00.003 INFO juju.state opening state, mongo addresses: ["localhost:33214"]; entity <nil>
[LOG] 0:00.003 DEBUG juju.state dialing mongo
[LOG] 0:00.005 INFO juju.mongo dialled mongo successfully on address "127.0.0.1:33214"
[LOG] 0:00.005 DEBUG juju.state connection established
[LOG] 0:00.005 DEBUG juju.state mongodb login successful
[LOG] 0:00.056 INFO juju.mongo dialled mongo successfully on address "127.0.0.1:33214"
[LOG] 0:00.057 INFO juju.state initializing state server environment b0c1e8b4-d357-4409-8374-ccac54a2d020
[LOG] 0:00.086 INFO juju.state running state anonymously; using unique client id
[LOG] 0:00.086 INFO juju.state creating lease client as anon-823c28e2-6fb3-4c0b-86a7-56206c1ab137
[LOG] 0:00.088 INFO juju.mongo dialled mongo successfully on address "127.0.0.1:33214"
[LOG] 0:00.093 INFO juju.state starting leadership manager
[LOG] 0:00.093 INFO juju.state creating cloud image metadata storage
[LOG] 0:00.093 INFO juju.state starting presence watcher
SetUpTest done
[LOG] 0:00.096 INFO juju.mongo dialled mongo successfully on address "127.0.0.1:33214"
assign_test.go:309:
    c.Assert(checkPrincipals(), gc.DeepEquals, []string{"wordpress/0", "wordpress/1"})
assign_test.go:305:
    c.Errorf(`machine document does not have a "principals" field`)
... Error: machine document does not have a "principals" field

assign_test.go:309:
    c.Assert(checkPrincipals(), gc.DeepEquals, []string{"wordpress/0", "wordpress/1"})
... obtained []string = []string(nil)
... expected []string = []string{"wordpress/0", "wordpress/1"}