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import unittest
import json
import os
from subprocess import Popen, PIPE
from genson import SchemaBuilder
BASE_SCHEMA = {"$schema": SchemaBuilder.DEFAULT_URI}
FIXTURE_PATH = os.path.join(os.path.dirname(__file__), 'fixtures')
SHORT_USAGE = """\
usage: genson [-h] [--version] [-d DELIM] [-e ENCODING] [-i SPACES]
[-s SCHEMA] [-$ SCHEMA_URI]
..."""
def fixture(filename):
return os.path.join(FIXTURE_PATH, filename)
def stderr_message(message):
return '{}\ngenson: error: {}\n'.format(SHORT_USAGE, message)
def run(args=tuple(), stdin_data=None):
"""
Run the ``genson`` executable as a subprocess and return
(stdout, stderr).
"""
full_args = ['python3', '-m', 'genson']
full_args.extend(args)
env = os.environ.copy()
env['COLUMNS'] = '80' # set width for deterministic text wrapping
genson_process = Popen(
full_args, env=env, stdout=PIPE, stderr=PIPE,
stdin=PIPE if stdin_data is not None else None)
if stdin_data is not None:
stdin_data = stdin_data.encode('utf-8')
(stdout, stderr) = genson_process.communicate(stdin_data)
genson_process.wait()
if isinstance(stdout, bytes):
stdout = stdout.decode('utf-8')
if isinstance(stderr, bytes):
stderr = stderr.decode('utf-8')
return (stdout, stderr)
class TestBasic(unittest.TestCase):
def test_empty_input(self):
(stdout, stderr) = run(stdin_data='')
self.assertEqual(stderr, '')
self.assertEqual(json.loads(stdout), BASE_SCHEMA)
def test_empty_object_stdin(self):
(stdout, stderr) = run(stdin_data='{}')
self.assertEqual(stderr, '')
self.assertEqual(
json.loads(stdout),
dict({"type": "object"}, **BASE_SCHEMA))
def test_empty_object_file(self):
(stdout, stderr) = run([fixture('empty.json')])
self.assertEqual(stderr, '')
self.assertEqual(
json.loads(stdout),
BASE_SCHEMA)
def test_basic_schema_file(self):
(stdout, stderr) = run(['-s', fixture('base_schema.json')])
self.assertEqual(stderr, '')
self.assertEqual(
json.loads(stdout),
BASE_SCHEMA)
class TestError(unittest.TestCase):
maxDiff = 1000
BAD_JSON_FILE = fixture('not_json.txt')
BAD_JSON_MESSAGE = stderr_message(
'invalid JSON in %s: Expecting value: line 1 column 1 (char 0)'
% BAD_JSON_FILE)
def test_no_input(self):
(stdout, stderr) = run()
self.assertEqual(stderr, stderr_message(
'noting to do - no schemas or objects given'))
self.assertEqual(stdout, '')
def test_object_not_json(self):
(stdout, stderr) = run([self.BAD_JSON_FILE])
self.assertEqual(stderr, self.BAD_JSON_MESSAGE)
self.assertEqual(stdout, '')
def test_schema_not_json(self):
(stdout, stderr) = run(['-s', self.BAD_JSON_FILE])
self.assertEqual(stderr, self.BAD_JSON_MESSAGE)
self.assertEqual(stdout, '')
class TestDelimiter(unittest.TestCase):
def test_delim_newline(self):
(stdout, stderr) = run(['-d', 'newline'],
stdin_data='{"hi":"there"}\n{"hi":5}')
self.assertEqual(stderr, '')
self.assertEqual(
json.loads(stdout),
dict({"required": ["hi"], "type": "object", "properties": {
"hi": {"type": ["integer", "string"]}}}, **BASE_SCHEMA))
def test_delim_auto_empty(self):
(stdout, stderr) = run(['-d', ''], stdin_data='{"hi":"there"}{"hi":5}')
self.assertEqual(stderr, '')
self.assertEqual(
json.loads(stdout),
dict({"required": ["hi"], "type": "object", "properties": {
"hi": {"type": ["integer", "string"]}}}, **BASE_SCHEMA))
def test_delim_auto_whitespace(self):
(stdout, stderr) = run(['-d', ''],
stdin_data='{"hi":"there"} \n\t{"hi":5}')
self.assertEqual(stderr, '')
self.assertEqual(
json.loads(stdout),
dict({"required": ["hi"], "type": "object", "properties": {
"hi": {"type": ["integer", "string"]}}}, **BASE_SCHEMA))
class TestEncoding(unittest.TestCase):
def test_encoding_unicode(self):
(stdout, stderr) = run(
['-e', 'utf-8', fixture('utf-8.json')])
self.assertEqual(stderr, '')
self.assertEqual(
json.loads(stdout),
dict({"type": "string"}, **BASE_SCHEMA))
def test_encoding_cp1252(self):
(stdout, stderr) = run(
['-e', 'cp1252', fixture('cp1252.json')])
self.assertEqual(stderr, '')
self.assertEqual(
json.loads(stdout),
dict({"type": "string"}, **BASE_SCHEMA))
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