shared config for tests,add fallback location test

tests/location_fallback.py

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+"""
+To test my.location.fallback_location.all
+"""
+
+from typing import Iterator
+from datetime import datetime, timezone, timedelta
+
+from more_itertools import ilen
+
+from my.ip.common import IP
+
+def data() -> Iterator[IP]:
+    # random IP addresses
+    yield IP(addr="67.98.113.0", dt=datetime(2020, 1, 1, 12, 0, 0, tzinfo=timezone.utc))
+    yield IP(addr="67.98.112.0", dt=datetime(2020, 1, 15, 12, 0, 0, tzinfo=timezone.utc))
+    yield IP(addr="59.40.113.87", dt=datetime(2020, 2, 1, 12, 0, 0, tzinfo=timezone.utc))
+    yield IP(addr="59.40.139.87", dt=datetime(2020, 2, 1, 16, 0, 0, tzinfo=timezone.utc))
+    yield IP(addr="161.235.192.228", dt=datetime(2020, 3, 1, 12, 0, 0, tzinfo=timezone.utc))
+
+# redefine the my.ip.all function using data for testing
+import my.ip.all as ip_module
+ip_module.ips = data
+
+from my.location.fallback import via_ip
+
+# these are all tests for the bisect algorithm defined in via_ip.py
+# to make sure we can correctly find IPs that are within the 'for_duration' of a given datetime
+
+def test_ip_fallback() -> None:
+    # make sure that the data override works
+    assert ilen(ip_module.ips()) == ilen(data())
+    assert ilen(ip_module.ips()) == ilen(via_ip.fallback_locations())
+    assert ilen(via_ip.fallback_locations()) == 5
+    assert ilen(via_ip._sorted_fallback_locations()) == 5
+
+    # confirm duration from via_ip since that is used for bisect
+    assert via_ip.config.for_duration == timedelta(hours=24)
+
+    # basic tests
+
+    # try estimating slightlight before the first IP
+    est = list(via_ip.estimate_location(datetime(2020, 1, 1, 11, 59, 59, tzinfo=timezone.utc)))
+    assert len(est) == 0
+
+    # during the duration for the first IP
+    est = list(via_ip.estimate_location(datetime(2020, 1, 1, 12, 30, 0, tzinfo=timezone.utc)))
+    assert len(est) == 1
+
+    # right after the 'for_duration' for an IP
+    est = list(via_ip.estimate_location(datetime(2020, 1, 1, 12, 0, 0, tzinfo=timezone.utc) + via_ip.config.for_duration + timedelta(seconds=1)))
+    assert len(est) == 0
+
+    # on 2/1/2020, theres one IP if before 16:30
+    est = list(via_ip.estimate_location(datetime(2020, 2, 1, 12, 30, 0, tzinfo=timezone.utc)))
+    assert len(est) == 1
+
+    # and two if after 16:30
+    est = list(via_ip.estimate_location(datetime(2020, 2, 1, 17, 00, 0, tzinfo=timezone.utc)))
+    assert len(est) == 2
+
+    # the 12:30 IP should 'expire' before the 16:30 IP, use 3:30PM on the next day
+    est = list(via_ip.estimate_location(datetime(2020, 2, 2, 15, 30, 0, tzinfo=timezone.utc)))
+    assert len(est) == 1
+
+    use_dt = datetime(2020, 3, 1, 12, 15, 0, tzinfo=timezone.utc)
+
+    # test last IP
+    est = list(via_ip.estimate_location(use_dt))
+    assert len(est) == 1
+
+    # datetime should be the IPs, not the passed IP (if via_home, it uses the passed dt)
+    assert est[0].dt != use_dt
+
+    # test interop with other fallback estimators/all.py
+    #
+    # redefine fallback_estimators to prevent possible namespace packages the user
+    # may have installed from having side effects testing this
+    from my.location.fallback import all
+    from my.location.fallback import via_home
+    def _fe() -> Iterator[all.LocationEstimator]:
+        yield via_ip.estimate_location
+        yield via_home.estimate_location
+
+    all.fallback_estimators = _fe
+    assert ilen(all.fallback_estimators()) == 2
+
+    # test that all.estimate_location has access to both IPs
+    #
+    # just passing via_ip should give one IP
+    from my.location.fallback.common import _iter_estimate_from
+    raw_est = list(_iter_estimate_from(use_dt, (via_ip.estimate_location,)))
+    assert len(raw_est) == 1
+    assert raw_est[0].accuracy == 10_000
+
+    # passing home should give one
+    home_est = list(_iter_estimate_from(use_dt, (via_home.estimate_location,)))
+    assert len(home_est) == 1
+    assert home_est[0].accuracy == 30_000
+
+    # make sure ip accuracy is more accurate
+    assert raw_est[0].accuracy < home_est[0].accuracy
+
+    # passing both should give two
+    raw_est = list(_iter_estimate_from(use_dt, (via_ip.estimate_location, via_home.estimate_location)))
+    assert len(raw_est) == 2
+
+    # shouldnt raise value error
+    all_est = all.estimate_location(use_dt)
+    # should have used the IP from via_ip since it was more accurate
+    assert all_est.datasource == "via_ip"
+
+    # test that a home defined in shared_config.py is used if no IP is found
+    loc = all.estimate_location(datetime(2021, 1, 1, 12, 30, 0, tzinfo=timezone.utc))
+    assert loc.datasource == "via_home"
+
+    # test a different home using location.fallback.all
+    bulgaria = all.estimate_location(datetime(2006, 1, 1, 12, 30, 0, tzinfo=timezone.utc))
+    assert bulgaria.datasource == "via_home"
+    assert (bulgaria.lat, bulgaria.lon) == (42.697842, 23.325973)
+    assert (loc.lat, loc.lon) != (bulgaria.lat, bulgaria.lon)
+
+
+# re-use prepare fixture for overriding config from shared_config.py
+from .tz import prepare