Issue 1362 fleetctl user roles (#1397)

* WIP

* Add get user_roles and apply for a user_roles spec to fleetctl

* Uncomment other tests

* Update test to check output

* Update test with the new struct

* Mock token so that it doesn't pick up the one in the local machine

* Address review comments

* Fix printJSON and printYaml

* Fix merge conflict error

* If both roles are specified, fail

* Fix test

* Switch arguments around

* Update test with the new rule

* Fix other tests that fell through the cracks

cmd/fleetctl/testing_utils.go

@@ -0,0 +1,59 @@
+package main
+
+import (
+	"bytes"
+	"net/http/httptest"
+	"os"
+	"testing"
+	"time"
+
+	"github.com/fleetdm/fleet/v4/server/fleet"
+	"github.com/fleetdm/fleet/v4/server/mock"
+	"github.com/fleetdm/fleet/v4/server/service"
+	"github.com/stretchr/testify/require"
+	"github.com/urfave/cli/v2"
+)
+
+func runServerWithMockedDS(t *testing.T) (*httptest.Server, *mock.Store) {
+	ds := new(mock.Store)
+	var users []*fleet.User
+	ds.NewUserFunc = func(user *fleet.User) (*fleet.User, error) {
+		users = append(users, user)
+		return user, nil
+	}
+	ds.SessionByKeyFunc = func(key string) (*fleet.Session, error) {
+		return &fleet.Session{
+			CreateTimestamp: fleet.CreateTimestamp{CreatedAt: time.Now()},
+			ID:              1,
+			AccessedAt:      time.Now(),
+			UserID:          1,
+			Key:             key,
+		}, nil
+	}
+	ds.MarkSessionAccessedFunc = func(session *fleet.Session) error {
+		return nil
+	}
+	ds.UserByIDFunc = func(id uint) (*fleet.User, error) {
+		return users[0], nil
+	}
+	ds.ListUsersFunc = func(opt fleet.UserListOptions) ([]*fleet.User, error) {
+		return users, nil
+	}
+	_, server := service.RunServerForTestsWithDS(t, ds)
+	os.Setenv("FLEET_SERVER_ADDRESS", server.URL)
+
+	return server, ds
+}
+
+func runAppForTest(t *testing.T, args []string) string {
+	w := new(bytes.Buffer)
+	r, _, _ := os.Pipe()
+	var exitErr error
+	app := createApp(r, w, func(context *cli.Context, err error) {
+		exitErr = err
+	})
+	err := app.Run(append([]string{""}, args...))
+	require.Nil(t, err)
+	require.Nil(t, exitErr)
+	return w.String()
+}