new files

Author: kusuma-aluri

tests/test_can.py

@@ -0,0 +1,6 @@
+import pytest
+
+
+@pytest.mark.skip("Requires CAN interface setup")
+def test_can_send():
+    pass

tests/test_gpio.py

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+import RPi.GPIO as GPIO
+import pytest
+import time
+
+
+@pytest.fixture(scope="module", autouse=True)
+def setup_gpio_module():
+    GPIO.setmode(GPIO.BCM)
+    yield
+    GPIO.cleanup()
+
+
+def test_gpio_library_available():
+    assert hasattr(GPIO, "setup")
+
+
+def test_gpio_high_low():
+
+    test_pin = 17
+    GPIO.setup(test_pin, GPIO.OUT)
+
+    GPIO.output(test_pin, GPIO.HIGH)
+    time.sleep(0.1)
+
+    assert GPIO.input(test_pin) == GPIO.HIGH
+
+    GPIO.output(test_pin, GPIO.LOW)
+    time.sleep(0.1)
+
+    assert GPIO.input(test_pin) == GPIO.LOW
+
+
+def test_gpio_loopback():
+
+    out_pin = 17
+    in_pin = 27
+
+    GPIO.setup(out_pin, GPIO.OUT)
+    GPIO.setup(in_pin, GPIO.IN)
+
+    GPIO.output(out_pin, GPIO.HIGH)
+    time.sleep(0.1)
+
+    assert GPIO.input(in_pin) == GPIO.HIGH
+
+    GPIO.output(out_pin, GPIO.LOW)
+    time.sleep(0.1)
+
+    assert GPIO.input(in_pin) == GPIO.LOW

tests/test_i2c.py

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+import smbus
+import pytest
+
+
+def test_i2c_library_available():
+
+    bus = smbus.SMBus(1)
+    assert bus is not None
+
+
+def test_i2c_scan():
+
+    bus = smbus.SMBus(1)
+
+    devices = []
+
+    for addr in range(0x03, 0x77):
+        try:
+            bus.write_quick(addr)
+            devices.append(addr)
+        except:
+            pass
+
+    assert isinstance(devices, list)

tests/test_spi.py

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+import spidev
+import pytest
+
+
+def test_spi_library_available():
+    spi = spidev.SpiDev()
+    assert spi is not None
+
+
+def test_spi_open():
+
+    spi = spidev.SpiDev()
+
+    spi.open(0, 0)   # SPI bus 0, device 0
+    spi.max_speed_hz = 500000
+
+    response = spi.xfer2([0x00])
+
+    spi.close()
+
+    assert isinstance(response, list)