tests/pup/motors: Add basic DCMotor test.

Fixes pybricks/support#363

tests/pup/motors/dcmotor.py

@@ -0,0 +1,30 @@
+# SPDX-License-Identifier: MIT
+# Copyright (c) 2020 The Pybricks Authors
+
+"""
+Hardware Module: Any hub with a DC motor on port D.
+
+Description: Verifies DCMotor class.
+"""
+
+from pybricks.pupdevices import DCMotor
+from pybricks.parameters import Port, Direction
+from pybricks.tools import wait
+
+# Initialize the motor.
+motor = DCMotor(Port.D)
+
+# Speed up, slow down, reverse.
+for i in tuple(range(0, 150)) + tuple(range(150, -150, -1)):
+    motor.dc(i)
+    wait(30)
+
+# Brake from full speed.
+motor.brake()
+wait(1000)
+
+# Coast from full speed.
+motor = DCMotor(Port.D, positive_direction=Direction.COUNTERCLOCKWISE)
+motor.dc(100)
+wait(1000)
+motor.stop()