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147 lines (121 loc) · 4.79 KB
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# 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 io
import unittest
import pytest
import pyarrow as pa
from pyarrow.json import read_json, ReadOptions, ParseOptions
def test_read_options():
cls = ReadOptions
opts = cls()
assert opts.block_size > 0
opts.block_size = 12345
assert opts.block_size == 12345
assert opts.use_threads is True
opts.use_threads = False
assert opts.use_threads is False
opts = cls(block_size=1234, use_threads=False)
assert opts.block_size == 1234
assert opts.use_threads is False
def test_parse_options():
cls = ParseOptions
opts = cls()
assert opts.newlines_in_values is False
assert opts.explicit_schema is None
opts.newlines_in_values = True
assert opts.newlines_in_values is True
schema = pa.schema([pa.field('foo', pa.int32())])
opts.explicit_schema = schema
assert opts.explicit_schema == schema
class BaseTestJSONRead:
def read_bytes(self, b, **kwargs):
return self.read_json(pa.py_buffer(b), **kwargs)
def check_names(self, table, names):
assert table.num_columns == len(names)
assert [c.name for c in table.columns] == names
def test_file_object(self):
data = b'{"a": 1, "b": 2}\n'
expected_data = {'a': [1], 'b': [2]}
bio = io.BytesIO(data)
table = self.read_json(bio)
assert table.to_pydict() == expected_data
# Text files not allowed
sio = io.StringIO(data.decode())
with pytest.raises(TypeError):
self.read_json(sio)
def test_simple_ints(self):
# Infer integer columns
rows = b'{"a": 1,"b": 2, "c": 3}\n{"a": 4,"b": 5, "c": 6}\n'
table = self.read_bytes(rows)
schema = pa.schema([('a', pa.int64()),
('b', pa.int64()),
('c', pa.int64())])
assert table.schema == schema
assert table.to_pydict() == {
'a': [1, 4],
'b': [2, 5],
'c': [3, 6],
}
def test_simple_varied(self):
# Infer various kinds of data
rows = (b'{"a": 1,"b": 2, "c": "3", "d": false}\n'
b'{"a": 4.0, "b": -5, "c": "foo", "d": true}\n')
table = self.read_bytes(rows)
schema = pa.schema([('a', pa.float64()),
('b', pa.int64()),
('c', pa.string()),
('d', pa.bool_())])
assert table.schema == schema
assert table.to_pydict() == {
'a': [1.0, 4.0],
'b': [2, -5],
'c': [u"3", u"foo"],
'd': [False, True],
}
def test_simple_nulls(self):
# Infer various kinds of data, with nulls
rows = (b'{"a": 1, "b": 2, "c": null, "d": null, "e": null}\n'
b'{"a": null, "b": -5, "c": "foo", "d": null, "e": true}\n'
b'{"a": 4.5, "b": null, "c": "nan", "d": null,"e": false}\n')
table = self.read_bytes(rows)
schema = pa.schema([('a', pa.float64()),
('b', pa.int64()),
('c', pa.string()),
('d', pa.null()),
('e', pa.bool_())])
assert table.schema == schema
assert table.to_pydict() == {
'a': [1.0, None, 4.5],
'b': [2, -5, None],
'c': [None, u"foo", u"nan"],
'd': [None, None, None],
'e': [None, True, False],
}
class TestSerialJSONRead(BaseTestJSONRead, unittest.TestCase):
def read_json(self, *args, **kwargs):
read_options = kwargs.setdefault('read_options', ReadOptions())
read_options.use_threads = False
table = read_json(*args, **kwargs)
table.validate()
return table
class TestParallelJSONRead(BaseTestJSONRead, unittest.TestCase):
def read_json(self, *args, **kwargs):
read_options = kwargs.setdefault('read_options', ReadOptions())
read_options.use_threads = True
table = read_json(*args, **kwargs)
table.validate()
return table