Phase is easy. Set your meter to A/C and connect to each pair of phase wires in turn, spin the motor relative to the axle (backwards if it's geared). if you see voltage generated, the windings are probably OK.
Hall wires: Apply 5v to the red one using black as ground. Set your meter to 20v d/c. Connect the probes to one of the three hall signal wires (green, blue or yellow) and turn the motor slowly (backwards if geared). You should see 5v go on and off several times as you rotate the wheel. Do the same for the other two.
If you want to be doubly sure, set your meter to beep (continuity) and check each wire to the motor case. If it beeps, you have a problem.
If the motor has separate phase wires and the normal block connector on the halls, you can use one of these:
http://www.ebay.co.uk/itm/24V-36V-48V-60V-Car-E-bike-Vehicle-Brushless-Controller-Tester-24V-to-60V-/252969773009?hash=item3ae62c67d1:g:NU4AAOSw~y9ZMMre
