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import locale
from contextlib import contextmanager
from functools import lru_cache
from itertools import product
from unittest import mock
import pytest
import pyqtgraph as pg
from pyqtgraph.graphicsItems.DateAxisItem import (
DAY_HOUR_ZOOM_LEVEL,
DAY_SPACING,
HMS_ZOOM_LEVEL,
HOUR_MINUTE_ZOOM_LEVEL,
HOUR_SPACING,
MINUTE_SPACING,
MONTH_SPACING,
MS_SPACING,
MS_ZOOM_LEVEL,
SEC_PER_YEAR,
SECOND_SPACING,
WEEK_SPACING,
YEAR_MONTH_ZOOM_LEVEL,
YEAR_SPACING,
ZoomLevel,
applyOffsetFromUtc,
calculateUtcOffset,
getPreferredOffsetFromUtc,
)
from pyqtgraph.Qt.QtCore import QDate, QDateTime, QTime, QTimeZone
from pyqtgraph.Qt.QtGui import QFont, QFontMetrics
app = pg.mkQApp()
def makeDateAxis():
axis = pg.DateAxisItem()
axis.fontMetrics = QFontMetrics(QFont())
axis.zoomLevel = YEAR_MONTH_ZOOM_LEVEL
return axis
@lru_cache
def densityForZoomLevel(level):
axis = makeDateAxis()
density = 3600
while axis.zoomLevel != level and density > 1:
axis.setZoomLevelForDensity(density)
density -= 1
return density
def getViewLengthInPxForZoomLevel(level, valuesRange):
return valuesRange / densityForZoomLevel(level)
def assert_subarray(subarray, array):
start = array.index(subarray[0])
assert array[start:start+len(subarray)] == subarray
@contextmanager
def inTimezone(timezone):
def fromSecsSinceEpochLocal(timestamp):
return QDateTime.fromMSecsSinceEpoch(timestamp * 1000).toTimeZone(timezone)
with mock.patch.object(QDateTime, "fromSecsSinceEpoch", fromSecsSinceEpochLocal):
yield
@pytest.fixture(autouse=True)
def reset_zoom_levels_utc_offsets():
for level in (
DAY_HOUR_ZOOM_LEVEL,
HOUR_MINUTE_ZOOM_LEVEL,
HMS_ZOOM_LEVEL,
MS_ZOOM_LEVEL,
):
level.utcOffset = None
@pytest.fixture
def dateAxis():
return makeDateAxis()
@pytest.fixture(autouse=True)
def use_c_locale():
locale.setlocale(locale.LC_TIME, "C")
def test_preferred_utc_offset_respects_chosen_offset():
assert getPreferredOffsetFromUtc(0, 7200) == 7200
assert getPreferredOffsetFromUtc(0, -7200) == -7200
@pytest.mark.qt_no_exception_capture
def test_preferred_utc_offset_doesnt_break_with_big_timestamps():
timestamp = SEC_PER_YEAR ** 13
assert -16 * 3600 <= getPreferredOffsetFromUtc(timestamp) <= 16 * 3600
assert getPreferredOffsetFromUtc(timestamp, 3600) == 3600
assert -16 * 3600 <= getPreferredOffsetFromUtc(-timestamp) <= 16 * 3600
assert getPreferredOffsetFromUtc(-timestamp, -1800) == -1800
def test_utc_offset_works_with_float_timestamp():
assert -16 * 3600 <= calculateUtcOffset(123456.0734) <= 16 * 3600
def test_applyOffsetFromUtc_does_what_it_promises_to_do():
timeZone = QTimeZone(b"UTC+4")
startDate = QDateTime(QDate(1970, 1, 2), QTime(2, 0), timeZone)
goalDate = QDateTime(QDate(1970, 1, 1), QTime(22, 0), timeZone)
assert (
startDate.toUTC().time() == goalDate.time()
and startDate.toUTC().date() == goalDate.date()
)
with inTimezone(timeZone):
shifted = applyOffsetFromUtc(startDate.toSecsSinceEpoch())
assert shifted == goalDate.toSecsSinceEpoch()
@pytest.mark.parametrize(
("timeZone", "transitionDate", "expectedDayTickStrings", "expectedHourTickStrings"),
(
(
QTimeZone(b"Europe/Berlin"),
QDate(2022, 10, 30),
["Sun 30"],
["01:00", "02:00", "02:00", "03:00", "04:00"],
),
(
QTimeZone(b"Europe/Berlin"),
QDate(2023, 3, 26),
["Sun 26"],
["01:00", "03:00", "04:00", "05:00", "06:00"],
),
(
QTimeZone(b"Pacific/Chatham"),
QDate(2024, 4, 7),
["Sun 07"],
["01:00", "02:00", "03:00", "03:00", "04:00"],
),
(
QTimeZone(b"Pacific/Chatham"),
QDate(2022, 9, 25),
["Sun 25"],
["01:00", "02:00", "04:00", "05:00", "06:00"],
),
(
QTimeZone(b"America/St_Johns"),
QDate(2012, 11, 4),
["Sun 04"],
["01:00", "01:00", "02:00", "03:00", "04:00"],
),
(
QTimeZone(b"America/St_Johns"),
QDate(1995, 4, 2),
["Sun 02"],
["02:00", "03:00", "04:00", "05:00", "06:00"],
),
(
QTimeZone(b"Australia/Lord_Howe"),
QDate(2007, 3, 25),
["Sun 25"],
["01:00", "02:00", "03:00", "04:00", "05:00"],
),
(
QTimeZone(b"Australia/Lord_Howe"),
QDate(2010, 10, 3),
["Sun 03"],
["01:00", "03:00", "04:00", "05:00", "06:00"],
),
),
ids=(
f"{zone}-{direction}"
for zone, direction
in product(
("Berlin", "Chatham", "St_Johns", "Lord_Howe"),
("backward", "forward"),
)
),
)
def test_maps_tick_values_to_local_times(
timeZone,
transitionDate,
expectedDayTickStrings,
expectedHourTickStrings,
dateAxis,
):
minTime = QDateTime(transitionDate, QTime(0, 0, 0, 0), timeZone).toSecsSinceEpoch()
maxTime = QDateTime(transitionDate, QTime(4, 0, 0, 0), timeZone).toSecsSinceEpoch()
xvals = list(range(minTime, maxTime + 3600, 3600))
timeRange = maxTime - minTime
lengthInPixels = getViewLengthInPxForZoomLevel(HOUR_MINUTE_ZOOM_LEVEL, timeRange)
with inTimezone(timeZone):
tickValues = dateAxis.tickValues(xvals[0] - 1, xvals[-1] + 1, lengthInPixels)
for spacing, ticks in tickValues:
if spacing == DAY_SPACING:
tickStrings = dateAxis.tickStrings(ticks, 1, DAY_SPACING)
assert_subarray(expectedDayTickStrings, tickStrings)
elif spacing == HOUR_SPACING:
tickStrings = dateAxis.tickStrings(ticks, 1, spacing)
assert_subarray(expectedHourTickStrings, tickStrings)
@pytest.mark.parametrize(
("timeZone"),
(
QTimeZone(b"Europe/Berlin"),
QTimeZone(b"Pacific/Chatham"),
QTimeZone(b"America/St_Johns"),
QTimeZone(b"Australia/Lord_Howe"),
),
ids=("Berlin", "Chatham", "St_Johns", "Lord_Howe"),
)
def test_maps_hour_ticks_to_local_times_when_skip_greater_than_one(timeZone, dateAxis):
date = QDate(2023, 5, 10)
minTime = QDateTime(date, QTime(0, 0, 0, 0), timeZone).toSecsSinceEpoch()
maxTime = QDateTime(date, QTime(18, 0, 0, 0), timeZone).toSecsSinceEpoch()
xvals = list(range(minTime, maxTime + 3600, 3600))
timeRange = maxTime - minTime
lengthInPixels = getViewLengthInPxForZoomLevel(DAY_HOUR_ZOOM_LEVEL, timeRange)
with inTimezone(timeZone):
tickValues = dateAxis.tickValues(xvals[0] - 1, xvals[-1] + 1, lengthInPixels)
for spacing, ticks in tickValues:
if spacing == HOUR_SPACING:
tickStrings = dateAxis.tickStrings(ticks, 1, spacing)
assert_subarray(["06:00", "12:00", "18:00"], tickStrings)
@pytest.mark.parametrize(
("zoomLevel", "expectedHourTickStrings"),
(
(HOUR_MINUTE_ZOOM_LEVEL, ["01:00", "02:00", "03:00", "04:00", "05:00"]),
(DAY_HOUR_ZOOM_LEVEL, ["06:00", "12:00", "18:00"]),
),
)
def test_custom_utc_offset_works(zoomLevel, expectedHourTickStrings, dateAxis):
maxHour = 4 if zoomLevel == HOUR_MINUTE_ZOOM_LEVEL else 18
utcZone = QTimeZone(b"UTC")
date = QDate(2001, 1, 1)
minTime = QDateTime(date, QTime(0, 0, 0, 0), utcZone).toSecsSinceEpoch()
maxTime = QDateTime(date, QTime(maxHour, 0, 0, 0), utcZone).toSecsSinceEpoch()
size_px = getViewLengthInPxForZoomLevel(zoomLevel, maxTime - minTime)
xvals = list(range(minTime, maxTime + 3600, 3600))
dateAxis.utcOffset = -3600
for spacing, ticks in dateAxis.tickValues(xvals[0] - 1, xvals[-1] + 1, size_px):
if spacing == DAY_SPACING:
tickStrings = dateAxis.tickStrings(ticks, 1, DAY_SPACING)
assert_subarray(["Mon 01"], tickStrings)
elif spacing == HOUR_SPACING:
tickStrings = dateAxis.tickStrings(ticks, 1, spacing)
assert_subarray(expectedHourTickStrings, tickStrings)
@pytest.mark.parametrize(
("localZone", "spacing", "expectedExtentionInHours"),
(
(QTimeZone(b"UTC+7"), MS_SPACING, 0),
(QTimeZone(b"UTC+5"), SECOND_SPACING, 0),
(QTimeZone(b"UTC+3"), MINUTE_SPACING, 0),
(QTimeZone(b"UTC+7"), HOUR_SPACING, 7),
(QTimeZone(b"UTC+6"), DAY_SPACING, 6),
(QTimeZone(b"UTC+5"), WEEK_SPACING, 5),
(QTimeZone(b"UTC+4"), MONTH_SPACING, 4),
(QTimeZone(b"UTC+3"), YEAR_SPACING, 3),
(QTimeZone(b"UTC"), MS_SPACING, 0),
(QTimeZone(b"UTC"), SECOND_SPACING, 0),
(QTimeZone(b"UTC"), MINUTE_SPACING, 0),
(QTimeZone(b"UTC"), HOUR_SPACING, 0),
(QTimeZone(b"UTC"), DAY_SPACING, 0),
(QTimeZone(b"UTC"), WEEK_SPACING, 0),
(QTimeZone(b"UTC"), MONTH_SPACING, 0),
(QTimeZone(b"UTC"), YEAR_SPACING, 0),
),
)
def test_extendTimeRangeForSpacing_repsects_utc_offset(
localZone, spacing, expectedExtentionInHours,
):
utcZone = QTimeZone(b"UTC")
date = QDate(2001, 1, 1)
minTime = QDateTime(date, QTime(0, 0, 0, 0), utcZone).toSecsSinceEpoch()
maxTime = QDateTime(date, QTime(18, 0, 0, 0), utcZone).toSecsSinceEpoch()
zoom = ZoomLevel([], "")
with inTimezone(localZone):
extMin, extMax = zoom.extendTimeRangeForSpacing(spacing, minTime, maxTime)
assert extMax - maxTime == expectedExtentionInHours * 3600
assert minTime - extMin == expectedExtentionInHours * 3600
|
