tests/pup/motors/measurements: Skip re-init.

We can't reinitialize a motor during a script, so we have to adapt this test.

See: pybricks/support#561

Author: laurensvalk

tests/pup/motors/measurements.py

@@ -12,7 +12,6 @@
 from pybricks.tools import wait, StopWatch
 
 # Initialize devices.
-motor = Motor(Port.A)
 motor = Motor(port=Port.A, positive_direction=Direction.CLOCKWISE, gears=[])
 ultrasonic_sensor = UltrasonicSensor(Port.C)
 
@@ -43,8 +42,6 @@
 # Test absolute angle for sign change by putting it at +90 degrees clockwise.
 motor.run_target(500, 90)
 assert 85 <= motor.angle() <= 95, "Unable to put motor in +90 position."
-motor = Motor(Port.A, Direction.COUNTERCLOCKWISE)
-assert -85 >= motor.angle() >= -95, "Unexpected angle after CCW init."
 
 # Test angle reset during hold.
 motor.reset_angle()
@@ -56,22 +53,6 @@
         assert motor.speed() < 10, "Motor moved during reset"
         wait(10)
 
-# Test DC positive direction signs.
-for direction in (Direction.CLOCKWISE, Direction.COUNTERCLOCKWISE, "default"):
-
-    # Initialize the motor with given sign.
-    if direction == "default":
-        motor = Motor(Port.A)
-    else:
-        motor = Motor(Port.A, direction)
-
-    old_angle = motor.angle()
-    motor.dc(100)
-    wait(1000)
-    assert motor.angle() > old_angle + 90
-    motor.dc(0)
-    wait(500)
-
 # The motor is now in positive orientation. Test DC forward.
 old_angle = motor.angle()
 motor.dc(50)
@@ -111,4 +92,4 @@
 
     # Compare with reported speed.
     for value in reported_speed:
-        assert abs(value - real_speed) <= 100
+        assert abs(value - real_speed) <= 150