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@@ -0,0 +1,77 @@
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+# python-cc1101 - Python Library to Transmit RF Signals via C1101 Transceivers
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+#
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+# Copyright (C) 2020 Fabian Peter Hammerle <fabian@hammerle.me>
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+#
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+# This program is free software: you can redistribute it and/or modify
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+# it under the terms of the GNU General Public License as published by
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+# the Free Software Foundation, either version 3 of the License, or
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+# any later version.
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+#
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+# This program is distributed in the hope that it will be useful,
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+# but WITHOUT ANY WARRANTY; without even the implied warranty of
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+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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+# GNU General Public License for more details.
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+#
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+# You should have received a copy of the GNU General Public License
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+# along with this program. If not, see <https://www.gnu.org/licenses/>.
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+
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+import unittest.mock
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+
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+import pytest
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+
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+# pylint: disable=protected-access
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+
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+
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+@pytest.mark.parametrize(
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+ ("mdmcfg1", "length"),
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+ [
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+ (0b00000010, 2),
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+ (0b00010010, 3),
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+ (0b00100010, 4),
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+ (0b00110010, 6),
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+ (0b01000010, 8),
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+ (0b01010010, 12),
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+ (0b01100010, 16),
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+ (0b01110010, 24),
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+ ],
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+)
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+def test_get_preamble_length_bytes(transceiver, mdmcfg1, length):
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+ transceiver._spi.xfer.return_value = [0, mdmcfg1]
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+ assert transceiver.get_preamble_length_bytes() == length
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+ transceiver._spi.xfer.assert_called_once_with([0x13 | 0x80, 0])
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+
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+
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+@pytest.mark.parametrize(
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+ ("mdmcfg1_before", "mdmcfg1_after", "length"),
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+ [
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+ (0b00000010, 0b00000010, 2),
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+ (0b00000010, 0b00010010, 3),
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+ (0b00000010, 0b00100010, 4),
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+ (0b00000010, 0b00110010, 6),
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+ (0b00000010, 0b01000010, 8),
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+ (0b00000010, 0b01010010, 12),
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+ (0b00000010, 0b01100010, 16),
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+ (0b00000010, 0b01110010, 24),
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+ (0b01010010, 0b01100010, 16),
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+ (0b01110010, 0b00000010, 2),
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+ (0b01110010, 0b01000010, 8),
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+ (0b11011010, 0b11101010, 16),
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+ (0b11110111, 0b11000111, 8),
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+ (0b11111110, 0b10001110, 2),
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+ ],
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+)
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+def test_set_preamble_length_bytes(transceiver, mdmcfg1_before, mdmcfg1_after, length):
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+ transceiver._spi.xfer.return_value = [15, 15]
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+ with unittest.mock.patch.object(
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+ transceiver, "_read_single_byte", return_value=mdmcfg1_before
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+ ):
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+ transceiver.set_preamble_length_bytes(length)
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+ transceiver._spi.xfer.assert_called_once_with([0x13 | 0x40, mdmcfg1_after])
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+
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+
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+@pytest.mark.parametrize(
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+ "length", [-21, 0, 1, 5, 7, 9, 10, 11, 13, 14, 15, 17, 20, 23, 25, 32, 42]
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+)
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+def test_set_preamble_length_bytes_invalid(transceiver, length):
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+ with pytest.raises(ValueError, match=r"\bpreamble length\b"):
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+ transceiver.set_preamble_length_bytes(length)
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