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# (C) Copyright 2005-2023 Enthought, Inc., Austin, TX
# All rights reserved.
#
# This software is provided without warranty under the terms of the BSD
# license included in LICENSE.txt and may be redistributed only under
# the conditions described in the aforementioned license. The license
# is also available online at http://www.enthought.com/licenses/BSD.txt
#
# Thanks for using Enthought open source!
from unittest import TestCase
from traits.api import HasTraits, Int, Str
from traits.testing.optional_dependencies import numpy as np, requires_numpy
from traits.version import version
from pyface.data_view.data_formats import (
from_csv, from_csv_column, from_csv_row, from_npy, from_json,
to_csv, to_csv_column, to_csv_row, to_npy, to_json,
)
def default_extractor(obj):
return obj.__getstate__()
def object_hook(data):
obj = ExampleObject()
obj.__setstate__(data)
return obj
class ExampleObject(HasTraits):
a = Int(1)
b = Str("two")
c = Str("three", transient=True)
class TestJSON(TestCase):
def test_to_json(self):
test_data = {'a': 1, 'b': 'two'}
raw_data = to_json(test_data)
self.assertEqual(raw_data, b'{"a":1,"b":"two"}')
def test_to_json_default(self):
test_data = ExampleObject()
raw_data = to_json(test_data, default=default_extractor)
self.assertEqual(
raw_data,
b'{"a":1,"b":"two","__traits_version__":"'
+ version.encode('utf-8')
+ b'"}'
)
def test_from_json(self):
raw_data = b'{"a":1,"b":"two"}'
data = from_json(raw_data)
self.assertEqual(data, {'a': 1, 'b': 'two'})
def test_from_json_object_hook(self):
raw_data = (
b'{"a":2,"b":"four","__traits_version__":"'
+ version.encode('utf-8')
+ b'"}'
)
data = from_json(raw_data, object_hook=object_hook)
self.assertIsInstance(data, ExampleObject)
self.assertEqual(data.a, 2)
self.assertEqual(data.b, 'four')
self.assertEqual(data.c, 'three')
class TestCSV(TestCase):
def test_to_csv(self):
test_data = [['one', 2], ['three,four', 5]]
raw_data = to_csv(test_data)
self.assertEqual(raw_data, b'one,2\r\n"three,four",5\r\n')
def test_to_csv_delimiter(self):
test_data = [['one', 2], ['three,four', 5]]
raw_data = to_csv(test_data, delimiter='\t')
self.assertEqual(raw_data, b'one\t2\r\nthree,four\t5\r\n')
def test_to_csv_encoding(self):
test_data = [['øne', 2], ['three,four', 5]]
raw_data = to_csv(test_data, encoding='latin-1')
self.assertEqual(raw_data, b'\xf8ne,2\r\n"three,four",5\r\n')
def test_from_csv(self):
raw_data = b'one,2\r\n"three,four",5\r\n'
data = from_csv(raw_data)
self.assertEqual(data, [['one', '2'], ['three,four', '5']])
def test_from_csv_delimiter(self):
raw_data = b'one\t2\r\nthree,four\t5\r\n'
data = from_csv(raw_data, delimiter='\t')
self.assertEqual(data, [['one', '2'], ['three,four', '5']])
def test_from_csv_encoding(self):
raw_data = b'\xf8ne,2\r\n"three,four",5\r\n'
data = from_csv(raw_data, encoding='latin-1')
self.assertEqual(data, [['øne', '2'], ['three,four', '5']])
def test_to_csv_column(self):
test_data = ['one', 2, 'three,four']
raw_data = to_csv_column(test_data)
self.assertEqual(raw_data, b'one\r\n2\r\n"three,four"\r\n')
def test_to_csv_column_delimiter(self):
test_data = ['one', 2, 'three,four']
raw_data = to_csv_column(test_data, delimiter='\t')
self.assertEqual(raw_data, b'one\r\n2\r\nthree,four\r\n')
def test_to_csv_column_encoding(self):
test_data = ['øne', 2, 'three,four']
raw_data = to_csv_column(test_data, encoding='latin-1')
self.assertEqual(raw_data, b'\xf8ne\r\n2\r\n"three,four"\r\n')
def test_from_csv_column(self):
raw_data = b'one\r\n2\r\n"three,four"\r\n'
data = from_csv_column(raw_data)
self.assertEqual(data, ['one', '2', 'three,four'])
def test_from_csv_column_delimiter(self):
raw_data = b'one\r\n2\r\nthree,four\r\n'
data = from_csv_column(raw_data, delimiter='\t')
self.assertEqual(data, ['one', '2', 'three,four'])
def test_from_csv_column_encoding(self):
raw_data = b'\xf8ne\r\n2\r\n"three,four"\r\n'
data = from_csv_column(raw_data, encoding='latin-1')
self.assertEqual(data, ['øne', '2', 'three,four'])
def test_to_csv_row(self):
test_data = ['one', 2, 'three,four']
raw_data = to_csv_row(test_data)
self.assertEqual(raw_data, b'one,2,"three,four"\r\n')
def test_to_csv_row_delimiter(self):
test_data = ['one', 2, 'three,four']
raw_data = to_csv_row(test_data, delimiter='\t')
self.assertEqual(raw_data, b'one\t2\tthree,four\r\n')
def test_to_csv_row_encoding(self):
test_data = ['øne', 2, 'three,four']
raw_data = to_csv_row(test_data, encoding='latin-1')
self.assertEqual(raw_data, b'\xf8ne,2,"three,four"\r\n')
def test_from_csv_row(self):
raw_data = b'one,2,"three,four"\r\n'
data = from_csv_row(raw_data)
self.assertEqual(data, ['one', '2', 'three,four'])
def test_from_csv_row_delimiter(self):
raw_data = b'one\t2\tthree,four\r\n'
data = from_csv_row(raw_data, delimiter='\t')
self.assertEqual(data, ['one', '2', 'three,four'])
def test_from_csv_row_encoding(self):
raw_data = b'\xf8ne,2,"three,four"\r\n'
data = from_csv_row(raw_data, encoding='latin-1')
self.assertEqual(data, ['øne', '2', 'three,four'])
@requires_numpy
class TestNpy(TestCase):
def test_to_npy(self):
data = np.array([[1, 2, 3], [4, 5, 6]], dtype='uint8')
raw_data = to_npy(data)
self.assertEqual(
raw_data,
b"\x93NUMPY\x01\x00v\x00{'descr': '|u1', 'fortran_order': False, 'shape': (2, 3), } \n" # noqa: E501
+ b"\x01\x02\x03\x04\x05\x06"
)
def test_from_npy(self):
raw_data = (
b"\x93NUMPY\x01\x00v\x00{'descr': '|u1', 'fortran_order': False, 'shape': (2, 3), } \n" # noqa: E501
+ b"\x01\x02\x03\x04\x05\x06"
)
data = from_npy(raw_data)
np.testing.assert_array_equal(
data,
np.array([[1, 2, 3], [4, 5, 6]], dtype='uint8')
)
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