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+# python-cc1101 - Python Library to Transmit RF Signals via CC1101 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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+ ("mdmcfg4", "exponent"),
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+ (
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+ (0b10001100, 12),
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+ (0b10001001, 9),
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+ (0b10001111, 15),
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+ (0b10000000, 0),
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+ (0b10111100, 12),
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+ (0b10111111, 15),
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+ (0b10110000, 0),
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+ ),
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+)
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+def test__get_symbol_rate_exponent(transceiver, mdmcfg4, exponent):
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+ transceiver._spi.xfer.return_value = [15, mdmcfg4]
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+ assert transceiver._get_symbol_rate_exponent() == exponent
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+ transceiver._spi.xfer.assert_called_once_with([0x10 | 0x80, 0])
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+
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+
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+@pytest.mark.parametrize(
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+ ("mdmcfg4_before", "mdmcfg4_after", "exponent"),
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+ (
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+ (0b10001100, 0b10001100, 12),
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+ (0b10001100, 0b10001111, 15),
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+ (0b10001100, 0b10000000, 0),
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+ (0b10001100, 0b10001010, 0b1010),
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+ (0b01111100, 0b01111100, 12),
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+ (0b01111100, 0b01111111, 15),
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+ (0b01111100, 0b01110000, 0),
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+ (0b01110001, 0b01111100, 12),
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+ ),
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+)
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+def test__set_symbol_rate_exponent(
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+ transceiver, mdmcfg4_before, mdmcfg4_after, exponent
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+):
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+ transceiver._spi.xfer.return_value = [0x0F, 0x0F]
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+ with unittest.mock.patch.object(
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+ transceiver, "_read_single_byte", return_value=mdmcfg4_before
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+ ):
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+ transceiver._set_symbol_rate_exponent(exponent)
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+ transceiver._spi.xfer.assert_called_once_with([0x10 | 0x40, mdmcfg4_after])
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