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#!/bin/env python
"""
Unit tests for high level Python interface for BUFR.
Author: Daniel Lee, DWD, 2016
"""
import os
from tempfile import NamedTemporaryFile
import unittest
from eccodes import BufrFile, BufrMessage
TESTBUFR = "../../data/bufr/syno_multi.bufr"
TEST_OUTPUT = "test-output.codes"
KNOWN_BUFR_KEYS = ['edition', 'masterTableNumber', 'bufrHeaderSubCentre', 'bufrHeaderCentre',
'updateSequenceNumber', 'dataCategory', 'dataSubCategory', 'masterTablesVersionNumber',
'localTablesVersionNumber', 'typicalYearOfCentury', 'typicalMonth', 'typicalDay',
'typicalHour', 'typicalMinute', 'typicalDate', 'typicalTime', 'rdbType', 'newSubtype', 'rdbtimeDay',
'rdbtimeHour', 'rdbtimeMinute', 'rdbtimeSecond', 'rectimeDay', 'rectimeHour', 'rectimeMinute', 'rectimeSecond',
'correction1', 'correction1Part', 'correction2', 'correction2Part', 'correction3', 'correction3Part',
'correction4', 'correction4Part', 'qualityControl', 'numberOfSubsets', 'localLatitude',
'localLongitude', 'observedData', 'compressedData', 'unexpandedDescriptors', 'subsetNumber', '#1#blockNumber',
'#1#blockNumber->percentConfidence', '#1#stationNumber', '#1#stationNumber->percentConfidence',
'#1#stationType', '#1#stationType->percentConfidence', '#1#year', '#1#year->percentConfidence',
'#1#month', '#1#month->percentConfidence', '#1#day', '#1#day->percentConfidence', '#1#hour',
'#1#hour->percentConfidence', '#1#minute', '#1#minute->percentConfidence', '#1#latitude',
'#1#latitude->percentConfidence', '#1#longitude', '#1#longitude->percentConfidence',
'#1#heightOfStation', '#1#heightOfStation->percentConfidence', '#1#nonCoordinatePressure',
'#1#nonCoordinatePressure->percentConfidence', '#1#pressureReducedToMeanSeaLevel',
'#1#pressureReducedToMeanSeaLevel->percentConfidence', '#1#3HourPressureChange',
'#1#3HourPressureChange->percentConfidence', '#1#characteristicOfPressureTendency',
'#1#characteristicOfPressureTendency->percentConfidence', '#1#windDirectionAt10M',
'#1#windDirectionAt10M->percentConfidence', '#1#windSpeedAt10M',
'#1#windSpeedAt10M->percentConfidence',
'#1#airTemperatureAt2M', '#1#airTemperatureAt2M->percentConfidence', '#1#dewpointTemperatureAt2M',
'#1#dewpointTemperatureAt2M->percentConfidence', '#1#relativeHumidity',
'#1#relativeHumidity->percentConfidence', '#1#horizontalVisibility',
'#1#horizontalVisibility->percentConfidence', '#1#presentWeather',
'#1#presentWeather->percentConfidence', '#1#pastWeather1', '#1#pastWeather1->percentConfidence',
'#1#pastWeather2', '#1#pastWeather2->percentConfidence', '#1#cloudCoverTotal',
'#1#cloudCoverTotal->percentConfidence', '#1#verticalSignificanceSurfaceObservations',
'#1#verticalSignificanceSurfaceObservations->percentConfidence', '#1#cloudAmount',
'#1#cloudAmount->percentConfidence', '#1#heightOfBaseOfCloud',
'#1#heightOfBaseOfCloud->percentConfidence', '#1#cloudType', '#1#cloudType->percentConfidence',
'#2#cloudType', '#2#cloudType->percentConfidence', '#3#cloudType', '#3#cloudType->percentConfidence',
'#2#verticalSignificanceSurfaceObservations',
'#2#verticalSignificanceSurfaceObservations->percentConfidence',
'#2#cloudAmount', '#2#cloudAmount->percentConfidence', '#4#cloudType',
'#4#cloudType->percentConfidence', '#2#heightOfBaseOfCloud',
'#2#heightOfBaseOfCloud->percentConfidence',
'#3#verticalSignificanceSurfaceObservations',
'#3#verticalSignificanceSurfaceObservations->percentConfidence',
'#3#cloudAmount', '#3#cloudAmount->percentConfidence', '#5#cloudType',
'#5#cloudType->percentConfidence',
'#3#heightOfBaseOfCloud', '#3#heightOfBaseOfCloud->percentConfidence',
'#4#verticalSignificanceSurfaceObservations',
'#4#verticalSignificanceSurfaceObservations->percentConfidence', '#4#cloudAmount',
'#4#cloudAmount->percentConfidence',
'#6#cloudType', '#6#cloudType->percentConfidence', '#4#heightOfBaseOfCloud',
'#4#heightOfBaseOfCloud->percentConfidence',
'#5#verticalSignificanceSurfaceObservations',
'#5#verticalSignificanceSurfaceObservations->percentConfidence', '#5#cloudAmount',
'#5#cloudAmount->percentConfidence', '#7#cloudType', '#7#cloudType->percentConfidence',
'#5#heightOfBaseOfCloud',
'#5#heightOfBaseOfCloud->percentConfidence', '#1#totalPrecipitationPast6Hours',
'#1#totalPrecipitationPast6Hours->percentConfidence', '#1#totalSnowDepth',
'#1#totalSnowDepth->percentConfidence',
'#1#centre', '#1#generatingApplication']
class TestBufrFile(unittest.TestCase):
"""Test BufrFile functionality."""
def test_memory_management(self):
"""Messages in BufrFile can be opened and closed properly."""
with BufrFile(TESTBUFR) as bufr_file:
self.assertEqual(len(bufr_file), 3)
for i in range(len(bufr_file)):
msg = BufrMessage(bufr_file)
self.assertEqual(msg["bufrHeaderCentre"], 98)
self.assertEqual(msg['count'], i + 1)
self.assertEqual(len(bufr_file.open_messages), 3)
self.assertEqual(len(bufr_file.open_messages), 0)
def test_message_counting_works(self):
"""The BufrFile is aware of its messages."""
with BufrFile(TESTBUFR) as bufr_file:
msg_count = len(bufr_file)
self.assertEqual(msg_count, 3)
def test_iterator_protocol(self):
"""The BufrFile allows pythonic iteration over all messages."""
latitudes = []
with BufrFile(TESTBUFR) as bufr_file:
for msg in bufr_file:
latitudes.append(msg["localLatitude"])
self.assertSequenceEqual(latitudes, [70.93, 77, 78.92])
def test_read_past_last_message(self):
"""Trying to open message on exhausted BUFR file raises IOError."""
with BufrFile(TESTBUFR) as bufr_file:
for _ in range(len(bufr_file)):
BufrMessage(bufr_file)
self.assertRaises(IOError, lambda: BufrMessage(bufr_file))
def test_read_invalid_file(self):
"""Trying to open message on nonexistent file raises IOError."""
with NamedTemporaryFile(mode='r') as f:
with BufrFile(f.name) as bufr_file:
self.assertRaises(IOError, lambda: BufrMessage(bufr_file))
class TestBufrMessage(unittest.TestCase):
"""Test BufrMessage functionality"""
def test_metadata(self):
"""Metadata is read correctly from BufrMessage."""
with BufrFile(TESTBUFR) as bufr_file:
msg = BufrMessage(bufr_file)
msg.unpack()
msg_keys = list(msg.keys())
self.assertEqual(len(msg_keys), 202)
for key in KNOWN_BUFR_KEYS:
assert key in msg_keys
# Size of message in bytes
self.assertEqual(msg.size(), 220)
self.assertEqual(len(list(msg.keys())), len(msg))
def test_content(self):
"""Data values are read correctly from BufrMessage."""
with BufrFile(TESTBUFR) as bufr_file:
msg = BufrMessage(bufr_file)
msg.unpack()
self.assertEqual(msg["airTemperatureAt2M"], 274.5)
# TODO: Test behaviour with missing messages (SUP-1874)
def test_value_setting(self):
"""Keys can be set properly."""
with BufrFile(TESTBUFR) as bufr_file:
msg = BufrMessage(bufr_file)
key, val = "localLongitude", 5
msg[key] = val
self.assertEqual(msg[key], val)
def test_serialize(self):
"""Message can be serialized to file."""
with BufrFile(TESTBUFR) as bufr_file:
msg = BufrMessage(bufr_file)
with open(TEST_OUTPUT, "wb") as test:
msg.write(test)
os.unlink(TEST_OUTPUT)
def test_clone(self):
"""Messages can be used to produce clone Messages."""
with BufrFile(TESTBUFR) as bufr_file:
msg = BufrMessage(bufr_file)
msg2 = BufrMessage(clone=msg)
self.assertSequenceEqual(list(msg.keys()), list(msg2.keys()))
def test_copy_data(self):
"""Can copy data section from one message to another"""
bufr = BufrMessage(sample='BUFR3')
with BufrFile('../../data/bufr/metar_with_2_bias.bufr') as bufr_file:
bufrin = BufrMessage(bufr_file)
ivalues = (
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 0, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 0)
bufr['inputDataPresentIndicator'] = ivalues
bufr['edition'] = 3
bufr['masterTableNumber'] = 0
bufr['bufrHeaderSubCentre'] = 0
bufr['bufrHeaderCentre'] = 98
bufr['updateSequenceNumber'] = 1
bufr['dataCategory'] = 0
bufr['dataSubCategory'] = 140
bufr['masterTablesVersionNumber'] = 13
bufr['localTablesVersionNumber'] = 1
bufr['typicalYearOfCentury'] = 15
bufr['typicalMonth'] = 5
bufr['typicalDay'] = 4
bufr['typicalHour'] = 9
bufr['typicalMinute'] = 30
bufr['numberOfSubsets'] = 1
bufr['observedData'] = 1
bufr['compressedData'] = 0
ivalues = (
307011, 7006, 10004, 222000, 101023, 31031, 1031, 1032, 101023, 33007,
225000, 236000, 101023, 31031, 1031, 1032, 8024, 101001, 225255, 225000,
236000, 101023, 31031, 1031, 1032, 8024, 101001, 225255,
1063, 2001, 4001, 4002, 4003, 4004, 4005, 5002,
6002, 7001, 7006, 11001, 11016, 11017, 11002)
bufr['unexpandedDescriptors'] = ivalues
bufrin.unpack()
bufrin.copy_data(bufr)
with open(TEST_OUTPUT, 'wb') as test:
bufr.write(test)
os.unlink(TEST_OUTPUT)
if __name__ == "__main__":
unittest.main()
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