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import json
import os
import sys
from decimal import Decimal
from io import StringIO
from agate import Table
from agate.data_types import Boolean, Date, DateTime, Number, Text, TimeDelta
from agate.testcase import AgateTestCase
class TestJSON(AgateTestCase):
def setUp(self):
self.rows = (
(1, 'a', True, '11/4/2015', '11/4/2015 12:22 PM', '4:15'),
(2, '👍', False, '11/5/2015', '11/4/2015 12:45 PM', '6:18'),
(None, 'b', None, None, None, None)
)
self.column_names = [
'number', 'text', 'boolean', 'date', 'datetime', 'timedelta'
]
self.column_types = [
Number(), Text(), Boolean(), Date(), DateTime(), TimeDelta()
]
def test_to_json(self):
table = Table(self.rows, self.column_names, self.column_types)
output = StringIO()
table.to_json(output, indent=4)
js1 = json.loads(output.getvalue())
with open('examples/test.json') as f:
js2 = json.load(f)
self.assertEqual(js1, js2)
def test_to_json_key(self):
table = Table(self.rows, self.column_names, self.column_types)
output = StringIO()
table.to_json(output, key='text', indent=4)
js1 = json.loads(output.getvalue())
with open('examples/test_keyed.json') as f:
js2 = json.load(f)
self.assertEqual(js1, js2)
def test_to_json_non_string_key(self):
table = Table(self.rows, self.column_names, self.column_types)
output = StringIO()
table.to_json(output, key='number', indent=4)
js1 = json.loads(output.getvalue())
with open('examples/test_non_string_keyed.json') as f:
js2 = json.load(f)
self.assertEqual(js1, js2)
def test_to_json_key_decimal(self):
table = Table([[Decimal('3')], [Decimal('3.0')], [Decimal('3.00')]], ['a'], [Number()])
output = StringIO()
with self.assertRaises(ValueError) as exc:
table.to_json(output, key='a', indent=4)
assert str(exc.exception) == 'Value 3 is not unique in the key column.'
def test_to_json_key_func(self):
table = Table(self.rows, self.column_names, self.column_types)
output = StringIO()
table.to_json(output, key=lambda r: r['text'], indent=4)
js1 = json.loads(output.getvalue())
with open('examples/test_keyed.json') as f:
js2 = json.load(f)
self.assertEqual(js1, js2)
def test_to_json_newline_delimited(self):
table = Table(self.rows, self.column_names, self.column_types)
output = StringIO()
table.to_json(output, newline=True)
js1 = json.loads(output.getvalue().split('\n')[0])
with open('examples/test_newline.json') as f:
js2 = json.loads(list(f)[0])
self.assertEqual(js1, js2)
def test_to_json_error_newline_indent(self):
table = Table(self.rows, self.column_names, self.column_types)
output = StringIO()
with self.assertRaises(ValueError):
table.to_json(output, newline=True, indent=4)
def test_to_json_error_newline_key(self):
table = Table(self.rows, self.column_names, self.column_types)
output = StringIO()
with self.assertRaises(ValueError):
table.to_json(output, key='three', newline=True)
def test_to_json_file_output(self):
table = Table(self.rows, self.column_names, self.column_types)
table.to_json('.test.json')
with open('.test.json') as f1:
js1 = json.load(f1)
with open('examples/test.json') as f2:
js2 = json.load(f2)
self.assertEqual(js1, js2)
os.remove('.test.json')
def test_to_json_make_dir(self):
table = Table(self.rows, self.column_names, self.column_types)
table.to_json('newdir/test.json')
with open('newdir/test.json') as f1:
js1 = json.load(f1)
with open('examples/test.json') as f2:
js2 = json.load(f2)
self.assertEqual(js1, js2)
os.remove('newdir/test.json')
os.rmdir('newdir/')
def test_print_json(self):
table = Table(self.rows, self.column_names, self.column_types)
old = sys.stdout
sys.stdout = StringIO()
try:
table.print_json()
js1 = json.loads(sys.stdout.getvalue())
with open('examples/test.json') as f:
js2 = json.load(f)
self.assertEqual(js1, js2)
finally:
sys.stdout = old
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