forked from evidens/json2csv
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tests.py
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tests.py
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import unittest
import json
from json2csv import Json2Csv, MultiLineJson2Csv
from gen_outline import make_outline
class TestJson2Csv(unittest.TestCase):
def test_init(self):
outline = {'map': [['some_header', 'some_key']]}
loader = Json2Csv(outline)
self.assertIn('some_header', loader.key_map)
self.assertRaises(ValueError, Json2Csv, None)
self.assertRaises(ValueError, Json2Csv, {})
def test_process_row(self):
"""Given a valid key-map and data, it should return a valid row"""
outline = {'map': [['id', '_id'], ['count', 'count']]}
loader = Json2Csv(outline)
test_data = json.loads('{"_id" : "Someone","count" : 1}')
row = loader.process_row(test_data)
self.assertIs(type(row), dict)
self.assertIn('id', row.keys())
self.assertIn('count', row.keys())
self.assertEquals(row['id'], 'Someone')
self.assertEquals(row['count'], 1)
def test_process_row_nested_data(self):
"""Ensure that nested keys (with . notation) are processed"""
key_map = {"map": [['author', 'source.author'], ['message', 'message.original']]}
loader = Json2Csv(key_map)
test_data = json.loads(
'{"source": {"author": "Someone"}, "message": {"original": "Hey!", "Revised": "Hey yo!"}}'
)
row = loader.process_row(test_data)
self.assertIs(type(row), dict)
self.assertIn('author', row.keys())
self.assertIn('message', row.keys())
self.assertEquals(row['author'], 'Someone')
self.assertEquals(row['message'], 'Hey!')
def test_process_row_array_index(self):
"""Ensure that array indices are properly handled as part of the dot notation"""
pass
def test_process_each(self):
outline = {'map': [['id', '_id'], ['count', 'count']], 'collection': 'result'}
loader = Json2Csv(outline)
test_data = json.loads('{"result":[{"_id" : "Someone","count" : 1}]}')
loader.process_each(test_data)
self.assertEquals(len(loader.rows), 1)
row = loader.rows[0]
self.assertIs(type(row), dict)
self.assertIn('id', row.keys())
self.assertIn('count', row.keys())
self.assertEquals(row['id'], 'Someone')
self.assertEquals(row['count'], 1)
def test_process_each_optional_key(self):
"""Ensure a key that is not always present won't prevent data extraction
Where the data is missing, None is returned
"""
outline = {'map': [['id', '_id'], ['count', 'count'], ['tags_0', 'tags.0']]}
loader = Json2Csv(outline)
test_data = json.loads('''[
{"_id": "Someone","count": 1, "tags": ["super"]},
{"_id": "Another", "tags": []}]''')
self.assertEquals(len(test_data), 2)
loader.process_each(test_data)
self.assertEquals(len(loader.rows), 2)
second_row = loader.rows[1]
self.assertEquals(second_row['id'], 'Another')
# works for missing dict keys
self.assertIsNone(second_row['count'])
# and missing list indices
self.assertIsNone(second_row['tags_0'])
def test_load_json(self):
outline = {"map": [['author', 'source.author'], ['message', 'message.original']], "collection": "nodes"}
loader = Json2Csv(outline)
with open('fixtures/data.json') as f:
loader.load(f)
first_row = loader.rows[0]
self.assertEqual(first_row['author'], 'Someone')
second_row = loader.rows[1]
self.assertEqual(second_row['author'], 'Another')
third_row = loader.rows[2]
self.assertEqual(third_row['author'], 'Me too')
def test_load_bare_json(self):
outline = {"map": [['author', 'source.author'], ['message', 'message.original']]}
loader = Json2Csv(outline)
with open('fixtures/bare_data.json') as f:
loader.load(f)
first_row = loader.rows[0]
self.assertEqual(first_row['author'], 'Someone')
second_row = loader.rows[1]
self.assertEqual(second_row['author'], 'Another')
third_row = loader.rows[2]
self.assertEqual(third_row['author'], 'Me too')
def test_write_csv(self):
pass
class TestMultiLineJson2Csv(unittest.TestCase):
def test_line_delimited(self):
outline = {"map": [['author', 'source.author'], ['message', 'message.original']]}
loader = MultiLineJson2Csv(outline)
with open('fixtures/line_delimited.json') as f:
loader.load(f)
first_row = loader.rows[0]
self.assertEqual(first_row['author'], 'Someone')
second_row = loader.rows[1]
self.assertEqual(second_row['author'], 'Another')
third_row = loader.rows[2]
self.assertEqual(third_row['author'], 'Me too')
class TestGenOutline(unittest.TestCase):
def test_basic(self):
with open('fixtures/data.json') as json_file:
outline = make_outline(json_file, False, 'nodes')
expected = {
'collection': 'nodes',
'map': [
('message_Revised', 'message.Revised'),
('message_original', 'message.original'),
('source_author', 'source.author'),
]
}
self.assertEqual(outline, expected)
def test_deeply_nested(self):
with open('fixtures/deeply_nested.json') as json_file:
outline = make_outline(json_file, False, 'nodes')
expected = {
'collection': 'nodes',
'map': [
('one_0_two_0_three_0', 'one.0.two.0.three.0'),
('one_0_two_0_three_1', 'one.0.two.0.three.1'),
('one_0_two_0_three_2', 'one.0.two.0.three.2'),
('one_0_two_1_three_0', 'one.0.two.1.three.0'),
('one_0_two_1_three_1', 'one.0.two.1.three.1'),
('one_0_two_1_three_2', 'one.0.two.1.three.2'),
]
}
self.assertEqual(outline, expected)
def test_different_keys_per_row(self):
"Outline should contain the union of the keys."
with open('fixtures/different_keys_per_row.json') as json_file:
outline = make_outline(json_file, False, 'nodes')
expected = {
'collection': 'nodes',
'map': [
('tags_0', 'tags.0'),
('tags_1', 'tags.1'),
('tags_2', 'tags.2'),
('that', 'that'),
('theother', 'theother'),
('this', 'this'),
]
}
self.assertEqual(outline, expected)
def test_line_delimited(self):
with open('fixtures/line_delimited.json') as json_file:
outline = make_outline(json_file, True, None)
expected = {
'map': [
('message_Revised', 'message.Revised'),
('message_original', 'message.original'),
('source_author', 'source.author'),
]
}
self.assertEqual(outline, expected)