# Licensed to the Apache Software Foundation (ASF) under one # or more contributor license agreements. See the NOTICE file # distributed with this work for additional information # regarding copyright ownership. The ASF licenses this file # to you under the Apache License, Version 2.0 (the # "License"); you may not use this file except in compliance # with the License. You may obtain a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. # See the License for the specific language governing permissions and # limitations under the License. import os import unittest import set_avro_test_path from avro import schema from avro import io from avro import datafile SCHEMAS_TO_VALIDATE = ( ('"null"', None), ('"boolean"', True), ('"string"', unicode('adsfasdf09809dsf-=adsf')), ('"bytes"', '12345abcd'), ('"int"', 1234), ('"long"', 1234), ('"float"', 1234.0), ('"double"', 1234.0), ('{"type": "fixed", "name": "Test", "size": 1}', 'B'), ('{"type": "enum", "name": "Test", "symbols": ["A", "B"]}', 'B'), ('{"type": "array", "items": "long"}', [1, 3, 2]), ('{"type": "map", "values": "long"}', {'a': 1, 'b': 3, 'c': 2}), ('["string", "null", "long"]', None), ("""\ {"type": "record", "name": "Test", "fields": [{"name": "f", "type": "long"}]} """, {'f': 5}), ("""\ {"type": "record", "name": "Lisp", "fields": [{"name": "value", "type": ["null", "string", {"type": "record", "name": "Cons", "fields": [{"name": "car", "type": "Lisp"}, {"name": "cdr", "type": "Lisp"}]}]}]} """, {'value': {'car': {'value': 'head'}, 'cdr': {'value': None}}}), ) FILENAME = 'test_datafile.out' CODECS_TO_VALIDATE = ('null', 'deflate') try: import snappy CODECS_TO_VALIDATE += ('snappy',) except ImportError: print 'Snappy not present, will skip testing it.' # TODO(hammer): clean up written files with ant, not os.remove class TestDataFile(unittest.TestCase): def test_round_trip(self): print '' print 'TEST ROUND TRIP' print '===============' print '' correct = 0 for i, (example_schema, datum) in enumerate(SCHEMAS_TO_VALIDATE): for codec in CODECS_TO_VALIDATE: print '' print 'SCHEMA NUMBER %d' % (i + 1) print '================' print '' print 'Schema: %s' % example_schema print 'Datum: %s' % datum print 'Codec: %s' % codec # write data in binary to file 10 times writer = open(FILENAME, 'wb') datum_writer = io.DatumWriter() schema_object = schema.parse(example_schema) dfw = datafile.DataFileWriter(writer, datum_writer, schema_object, codec=codec) for i in range(10): dfw.append(datum) dfw.close() # read data in binary from file reader = open(FILENAME, 'rb') datum_reader = io.DatumReader() dfr = datafile.DataFileReader(reader, datum_reader) round_trip_data = [] for datum in dfr: round_trip_data.append(datum) print 'Round Trip Data: %s' % round_trip_data print 'Round Trip Data Length: %d' % len(round_trip_data) is_correct = [datum] * 10 == round_trip_data if is_correct: correct += 1 print 'Correct Round Trip: %s' % is_correct print '' os.remove(FILENAME) self.assertEquals(correct, len(CODECS_TO_VALIDATE)*len(SCHEMAS_TO_VALIDATE)) def test_append(self): print '' print 'TEST APPEND' print '===========' print '' correct = 0 for i, (example_schema, datum) in enumerate(SCHEMAS_TO_VALIDATE): for codec in CODECS_TO_VALIDATE: print '' print 'SCHEMA NUMBER %d' % (i + 1) print '================' print '' print 'Schema: %s' % example_schema print 'Datum: %s' % datum print 'Codec: %s' % codec # write data in binary to file once writer = open(FILENAME, 'wb') datum_writer = io.DatumWriter() schema_object = schema.parse(example_schema) dfw = datafile.DataFileWriter(writer, datum_writer, schema_object, codec=codec) dfw.append(datum) dfw.close() # open file, write, and close nine times for i in range(9): writer = open(FILENAME, 'ab+') dfw = datafile.DataFileWriter(writer, io.DatumWriter()) dfw.append(datum) dfw.close() # read data in binary from file reader = open(FILENAME, 'rb') datum_reader = io.DatumReader() dfr = datafile.DataFileReader(reader, datum_reader) appended_data = [] for datum in dfr: appended_data.append(datum) print 'Appended Data: %s' % appended_data print 'Appended Data Length: %d' % len(appended_data) is_correct = [datum] * 10 == appended_data if is_correct: correct += 1 print 'Correct Appended: %s' % is_correct print '' os.remove(FILENAME) self.assertEquals(correct, len(CODECS_TO_VALIDATE)*len(SCHEMAS_TO_VALIDATE)) def test_context_manager(self): # Context manager was introduced as a first class # member only in Python 2.6 and above. import sys if sys.version_info < (2,6): print 'Skipping context manager tests on this Python version.' return # Test the writer with a 'with' statement. writer = open(FILENAME, 'wb') datum_writer = io.DatumWriter() sample_schema, sample_datum = SCHEMAS_TO_VALIDATE[1] schema_object = schema.parse(sample_schema) with datafile.DataFileWriter(writer, datum_writer, schema_object) as dfw: dfw.append(sample_datum) self.assertTrue(writer.closed) # Test the reader with a 'with' statement. datums = [] reader = open(FILENAME, 'rb') datum_reader = io.DatumReader() with datafile.DataFileReader(reader, datum_reader) as dfr: for datum in dfr: datums.append(datum) self.assertTrue(reader.closed) def test_metadata(self): # Test the writer with a 'with' statement. writer = open(FILENAME, 'wb') datum_writer = io.DatumWriter() sample_schema, sample_datum = SCHEMAS_TO_VALIDATE[1] schema_object = schema.parse(sample_schema) with datafile.DataFileWriter(writer, datum_writer, schema_object) as dfw: dfw.set_meta('test.string', 'foo') dfw.set_meta('test.number', '1') dfw.append(sample_datum) self.assertTrue(writer.closed) # Test the reader with a 'with' statement. datums = [] reader = open(FILENAME, 'rb') datum_reader = io.DatumReader() with datafile.DataFileReader(reader, datum_reader) as dfr: self.assertEquals('foo', dfr.get_meta('test.string')) self.assertEquals('1', dfr.get_meta('test.number')) for datum in dfr: datums.append(datum) self.assertTrue(reader.closed) if __name__ == '__main__': unittest.main()