esphome/tests/unit_tests/strategies.py

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from typing import Text
import hypothesis.strategies._internal.core as st
from hypothesis.strategies._internal.strategies import SearchStrategy
@st.defines_strategy_with_reusable_values
def mac_addr_strings():
# type: () -> SearchStrategy[Text]
"""A strategy for MAC address strings.
This consists of six strings representing integers [0..255],
without zero-padding, joined by dots.
"""
return st.builds(
"{:02X}:{:02X}:{:02X}:{:02X}:{:02X}:{:02X}".format, *(6 * [st.integers(0, 255)])
)