1 files changed, 103 insertions, 0 deletions
diff --git a/Adafruit_Python_GPIO/tests/test_PWM.py b/Adafruit_Python_GPIO/tests/test_PWM.py
new file mode 100644
index 0000000..d80bd1f
--- /dev/null
+++ b/Adafruit_Python_GPIO/tests/test_PWM.py
@@ -0,0 +1,103 @@
+# Copyright (c) 2014 Adafruit Industries
+# Author: Tony DiCola
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in
+# all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+# THE SOFTWARE.
+
+import unittest
+
+from mock import Mock, patch
+
+import Adafruit_GPIO.PWM as PWM
+import Adafruit_GPIO.Platform as Platform
+
+
+class TestRPi_PWM_Adapter(unittest.TestCase):
+    def test_setup(self):
+        rpi_gpio = Mock()
+        pwm = PWM.RPi_PWM_Adapter(rpi_gpio)
+        pwm.start(1, 50)
+        rpi_gpio.PWM.assert_called_with(1, 2000)
+
+    def test_set_duty_cycle_valid(self):
+        rpi_gpio = Mock()
+        pwm = PWM.RPi_PWM_Adapter(rpi_gpio)
+        pwm.start(1, 50)
+        pwm.set_duty_cycle(1, 75)
+        # Implicit verification that no assertion or other error thrown.
+
+    def test_set_duty_cycle_invalid(self):
+        rpi_gpio = Mock()
+        pwm = PWM.RPi_PWM_Adapter(rpi_gpio)
+        pwm.start(1, 50)
+        self.assertRaises(ValueError, pwm.set_duty_cycle, 1, 150)
+        self.assertRaises(ValueError, pwm.set_duty_cycle, 1, -10)
+
+    def test_set_frequency(self):
+        rpi_gpio = Mock()
+        pwm = PWM.RPi_PWM_Adapter(rpi_gpio)
+        pwm.start(1, 50)
+        pwm.set_frequency(1, 1000)
+        # Implicit verification that no assertion or other error thrown.
+
+
+class TestBBIO_PWM_Adapter(unittest.TestCase):
+    def test_setup(self):
+        bbio_pwm = Mock()
+        pwm = PWM.BBIO_PWM_Adapter(bbio_pwm)
+        pwm.start('P9_16', 50)
+        bbio_pwm.start.assert_called_with('P9_16', 50, 2000)
+
+    def test_set_duty_cycle_valid(self):
+        bbio_pwm = Mock()
+        pwm = PWM.BBIO_PWM_Adapter(bbio_pwm)
+        pwm.start('P9_16', 50)
+        pwm.set_duty_cycle('P9_16', 75)
+        bbio_pwm.set_duty_cycle.assert_called_with('P9_16', 75)
+
+    def test_set_duty_cycle_invalid(self):
+        bbio_pwm = Mock()
+        pwm = PWM.BBIO_PWM_Adapter(bbio_pwm)
+        pwm.start('P9_16', 50)
+        self.assertRaises(ValueError, pwm.set_duty_cycle, 'P9_16', 150)
+        self.assertRaises(ValueError, pwm.set_duty_cycle, 'P9_16', -10)
+
+    def test_set_frequency(self):
+        bbio_pwm = Mock()
+        pwm = PWM.BBIO_PWM_Adapter(bbio_pwm)
+        pwm.start('P9_16', 50)
+        pwm.set_frequency('P9_16', 1000)
+        bbio_pwm.set_frequency.assert_called_with('P9_16', 1000)
+
+
+class TestGetPlatformPWM(unittest.TestCase):
+    @patch.dict('sys.modules', {'RPi': Mock(), 'RPi.GPIO': Mock()})
+    @patch('Adafruit_GPIO.Platform.platform_detect', Mock(return_value=Platform.RASPBERRY_PI))
+    def test_raspberrypi(self):
+        pwm = PWM.get_platform_pwm()
+        self.assertIsInstance(pwm, PWM.RPi_PWM_Adapter)
+
+    @patch.dict('sys.modules', {'Adafruit_BBIO': Mock(), 'Adafruit_BBIO.PWM': Mock()})
+    @patch('Adafruit_GPIO.Platform.platform_detect', Mock(return_value=Platform.BEAGLEBONE_BLACK))
+    def test_beagleboneblack(self):
+        pwm = PWM.get_platform_pwm()
+        self.assertIsInstance(pwm, PWM.BBIO_PWM_Adapter)
+
+    @patch('Adafruit_GPIO.Platform.platform_detect', Mock(return_value=Platform.UNKNOWN))
+    def test_otherplatform(self):
+        self.assertRaises(RuntimeError, PWM.get_platform_pwm)