Tests.

library/tests/conftest.py

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+import pytest
+import mock
+import sys
+
+_mock_rpi_ws281x = mock.MagicMock()
+channels = {}
+
+
+def ws2811_channel_get(new_ws2811_t, ch):
+    if ch not in channels:
+        channels[ch] = {'new_ws2811_t': new_ws2811_t}
+    return channels[ch]
+
+
+def ws2811_channel_t_count_set(ch, count):
+    ch['count'] = count
+    ch['leds'] = [0 for _ in range(count)]
+
+
+def ws2811_channel_t_count_get(ch):
+    return ch['count']
+
+
+def ws2811_led_set(ch, n, rgbw):
+    ch['leds'][n] = rgbw
+
+
+def ws2811_led_get(ch, n):
+    return ch['leds'][n]
+
+
+_mock_rpi_ws281x.ws2811_channel_t_count_set = ws2811_channel_t_count_set
+_mock_rpi_ws281x.ws2811_channel_t_count_get = ws2811_channel_t_count_get
+_mock_rpi_ws281x.ws2811_channel_get = ws2811_channel_get
+_mock_rpi_ws281x.ws2811_led_set = ws2811_led_set
+_mock_rpi_ws281x.ws2811_led_get = ws2811_led_get
+
+
+@pytest.fixture(scope='function', autouse=False)
+def _rpi_ws281x():
+    _mock_rpi_ws281x.ws2811_init.return_value = 0
+    sys.modules['_rpi_ws281x'] = _mock_rpi_ws281x
+
+    yield _mock_rpi_ws281x
+    del sys.modules['_rpi_ws281x']
+    _mock_rpi_ws281x.reset_mock()
+    channels.clear()
+
+
+@pytest.fixture(scope='function', autouse=True)
+def rpi_ws281x(_rpi_ws281x):
+    if "." not in sys.path:
+        sys.path.append(".")
+    yield None
+    del sys.modules['rpi_ws281x']

library/tests/test_setup.py

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+import pytest
+
+
+def test_setup(_rpi_ws281x):
+    from rpi_ws281x import PixelStrip
+    strip = PixelStrip(10, 20)
+    strip.begin()
+
+
+def test_setup_init_fail(_rpi_ws281x):
+    from rpi_ws281x import PixelStrip
+    _rpi_ws281x.ws2811_init.return_value = 1
+    strip = PixelStrip(10, 20)
+    with pytest.raises(RuntimeError):
+        strip.begin()
+
+
+def test_num_pixels(_rpi_ws281x):
+    from rpi_ws281x import PixelStrip
+    strip = PixelStrip(10, 20)
+    strip.begin()
+    assert len(strip[:]) == 10
+    assert len(strip) == 10
+    assert strip.numPixels() == 10
+
+
+def test_set_pixel(_rpi_ws281x):
+    from rpi_ws281x import PixelStrip, RGBW
+    strip = PixelStrip(10, 20)
+    strip.begin()
+    strip[0] = RGBW(255, 0, 0)
+    assert strip[0] == strip.getPixelColor(0)
+    assert strip[0] == RGBW(255, 0, 0)
+    assert strip.getPixelColorRGB(0) == RGBW(255, 0, 0)
+    assert strip.getPixelColorRGBW(0) == RGBW(255, 0, 0)
+    assert strip.getPixelColorRGBW(0).r == 255
+
+
+def test_set_multiple(_rpi_ws281x):
+    from rpi_ws281x import PixelStrip, RGBW
+    strip = PixelStrip(10, 20)
+    strip.begin()
+    strip[:] = RGBW(255, 0, 0)
+    assert strip[:] == [RGBW(255, 0, 0)] * 10
+
+
+def test_set_odd(_rpi_ws281x):
+    from rpi_ws281x import PixelStrip, RGBW
+    strip = PixelStrip(10, 20)
+    strip.begin()
+    strip[::2] = RGBW(255, 0, 0)
+    assert strip[:] == [RGBW(255, 0, 0), RGBW(0, 0, 0)] * 5