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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 types import MappingProxyType
import unittest
from traits.api import TraitError
from traits.testing.api import UnittestTools
from pyface.data_view.abstract_data_model import DataViewSetError
from pyface.data_view.value_types.api import TextValue
from pyface.data_view.data_models.data_accessors import (
AttributeDataAccessor,
ConstantDataAccessor,
IndexDataAccessor,
KeyDataAccessor,
)
class AttributeDummy:
def __init__(self, attr_value):
self.attr_value = attr_value
class DataAccessorMixin(UnittestTools):
def accessor_observer(self, event):
self.accessor_event = event
def test_title_type_changed(self):
accessor = self.create_accessor()
accessor.observe(self.accessor_observer, 'updated')
with self.assertTraitChanges(accessor, 'updated', count=1):
accessor.title_type = TextValue()
self.assertEqual(self.accessor_event.new, (accessor, 'title'))
def test_title_type_updated(self):
accessor = self.create_accessor()
accessor.observe(self.accessor_observer, 'updated')
with self.assertTraitChanges(accessor, 'updated', count=1):
accessor.title_type.updated = True
self.assertEqual(self.accessor_event.new, (accessor, 'title'))
def test_value_type_changed(self):
accessor = self.create_accessor()
accessor.observe(self.accessor_observer, 'updated')
with self.assertTraitChanges(accessor, 'updated', count=1):
accessor.value_type = TextValue()
self.assertEqual(self.accessor_event.new, (accessor, 'value'))
def test_value_type_updated(self):
accessor = self.create_accessor()
accessor.observe(self.accessor_observer, 'updated')
with self.assertTraitChanges(accessor, 'updated', count=1):
accessor.value_type.updated = True
self.assertEqual(self.accessor_event.new, (accessor, 'value'))
class TestConstantDataAccessor(unittest.TestCase, DataAccessorMixin):
def create_accessor(self):
return ConstantDataAccessor(
title='Test',
value='test',
value_type=TextValue(),
)
def test_defaults(self):
accessor = ConstantDataAccessor()
self.assertEqual(accessor.value, None)
self.assertIsNone(accessor.value_type)
self.assertIsInstance(accessor.title_type, TextValue)
self.assertEqual(accessor.title, '')
def test_typical_defaults(self):
accessor = self.create_accessor()
self.assertIsInstance(accessor.title_type, TextValue)
self.assertEqual(accessor.title, 'Test')
def test_get_value(self):
accessor = self.create_accessor()
obj = object()
value = accessor.get_value(obj)
self.assertEqual(value, 'test')
def test_can_set_value(self):
accessor = self.create_accessor()
obj = object()
can_set = accessor.can_set_value(obj)
self.assertFalse(can_set)
def test_set_value_error(self):
accessor = self.create_accessor()
obj = object()
with self.assertRaises(DataViewSetError):
accessor.set_value(obj, 'new_value')
def test_value_updated(self):
accessor = self.create_accessor()
accessor.observe(self.accessor_observer, 'updated')
with self.assertTraitChanges(accessor, 'updated', count=1):
accessor.value = 'other_value'
self.assertEqual(self.accessor_event.new, (accessor, 'value'))
class TestAttributeDataAccessor(unittest.TestCase, DataAccessorMixin):
def create_accessor(self):
return AttributeDataAccessor(
attr='attr_value',
value_type=TextValue(),
)
def test_defaults(self):
accessor = AttributeDataAccessor()
self.assertEqual(accessor.attr, '')
self.assertIsNone(accessor.value_type)
self.assertIsInstance(accessor.title_type, TextValue)
self.assertEqual(accessor.title, '')
def test_typical_defaults(self):
accessor = self.create_accessor()
self.assertIsInstance(accessor.title_type, TextValue)
self.assertEqual(accessor.title, 'Attr Value')
def test_get_value(self):
accessor = self.create_accessor()
obj = AttributeDummy('test_value')
value = accessor.get_value(obj)
self.assertEqual(value, 'test_value')
def test_get_value_extended(self):
accessor = self.create_accessor()
accessor.attr = 'attr_value.attr_value'
obj = AttributeDummy(AttributeDummy('test_value'))
value = accessor.get_value(obj)
self.assertEqual(value, 'test_value')
def test_get_value_missing(self):
accessor = self.create_accessor()
accessor.attr = ''
obj = AttributeDummy('test_value')
with self.assertRaises(AttributeError):
accessor.get_value(obj)
def test_get_value_error(self):
accessor = self.create_accessor()
accessor.attr = 'other_attr'
obj = AttributeDummy('test_value')
with self.assertRaises(AttributeError):
accessor.get_value(obj)
def test_can_set_value(self):
accessor = self.create_accessor()
obj = AttributeDummy('test_value')
can_set = accessor.can_set_value(obj)
self.assertTrue(can_set)
def test_can_set_value_false(self):
accessor = AttributeDataAccessor()
obj = AttributeDummy('test_value')
can_set = accessor.can_set_value(obj)
self.assertFalse(can_set)
def test_set_value(self):
accessor = self.create_accessor()
obj = AttributeDummy('test_value')
accessor.set_value(obj, 'new_value')
self.assertEqual(obj.attr_value, 'new_value')
def test_set_value_extended(self):
accessor = self.create_accessor()
accessor.attr = 'attr_value.attr_value'
obj = AttributeDummy(AttributeDummy('test_value'))
accessor.set_value(obj, 'new_value')
self.assertEqual(obj.attr_value.attr_value, 'new_value')
def test_set_value_error(self):
accessor = AttributeDataAccessor()
obj = AttributeDummy('test_value')
with self.assertRaises(DataViewSetError):
accessor.set_value(obj, 'new_value')
def test_attr_updated(self):
accessor = self.create_accessor()
accessor.observe(self.accessor_observer, 'updated')
with self.assertTraitChanges(accessor, 'updated', count=1):
accessor.attr = 'other_attr'
self.assertEqual(self.accessor_event.new, (accessor, 'value'))
class TestIndexDataAccessor(unittest.TestCase, DataAccessorMixin):
def create_accessor(self):
return IndexDataAccessor(
index=1,
value_type=TextValue(),
)
def test_defaults(self):
accessor = IndexDataAccessor()
self.assertEqual(accessor.index, 0)
self.assertIsNone(accessor.value_type)
self.assertIsInstance(accessor.title_type, TextValue)
self.assertEqual(accessor.title, '0')
def test_typical_defaults(self):
accessor = self.create_accessor()
self.assertIsInstance(accessor.title_type, TextValue)
self.assertEqual(accessor.title, '1')
def test_get_value(self):
accessor = self.create_accessor()
obj = ['zero', 'one', 'two', 'three']
value = accessor.get_value(obj)
self.assertEqual(value, 'one')
def test_get_value_out_of_bounds(self):
accessor = self.create_accessor()
accessor.index = 10
obj = ['zero', 'one', 'two', 'three']
with self.assertRaises(IndexError):
accessor.get_value(obj)
def test_can_set_value(self):
accessor = self.create_accessor()
obj = ['zero', 'one', 'two', 'three']
can_set = accessor.can_set_value(obj)
self.assertTrue(can_set)
def test_can_set_value_false(self):
accessor = self.create_accessor()
obj = ['zero']
can_set = accessor.can_set_value(obj)
self.assertFalse(can_set)
def test_can_set_value_immuatble(self):
accessor = self.create_accessor()
obj = ('zero', 'one', 'two', 'three')
can_set = accessor.can_set_value(obj)
self.assertFalse(can_set)
def test_set_value(self):
accessor = self.create_accessor()
obj = ['zero', 'one', 'two', 'three']
accessor.set_value(obj, 'new_value')
self.assertEqual(obj[1], 'new_value')
def test_set_value_error(self):
accessor = self.create_accessor()
obj = ['zero']
with self.assertRaises(DataViewSetError):
accessor.set_value(obj, 'new_value')
def test_index_updated(self):
accessor = self.create_accessor()
accessor.observe(self.accessor_observer, 'updated')
with self.assertTraitChanges(accessor, 'updated', count=1):
accessor.index = 2
self.assertEqual(self.accessor_event.new, (accessor, 'value'))
class TestKeyDataAccessor(unittest.TestCase, DataAccessorMixin):
def create_accessor(self):
return KeyDataAccessor(
key='one',
value_type=TextValue(),
)
def test_defaults(self):
accessor = KeyDataAccessor()
self.assertIsNone(accessor.key)
self.assertIsNone(accessor.value_type)
self.assertIsInstance(accessor.title_type, TextValue)
self.assertEqual(accessor.title, 'None')
def test_typical_defaults(self):
accessor = self.create_accessor()
self.assertIsInstance(accessor.title_type, TextValue)
self.assertEqual(accessor.title, 'One')
def test_unhashable_error(self):
accessor = self.create_accessor()
with self.assertRaises(TraitError):
accessor.key = []
def test_get_value(self):
accessor = self.create_accessor()
obj = {'one': 'a', 'two': 'b'}
value = accessor.get_value(obj)
self.assertEqual(value, 'a')
def test_get_value_missing(self):
accessor = self.create_accessor()
accessor.key = 'three'
obj = {'one': 'a', 'two': 'b'}
with self.assertRaises(KeyError):
accessor.get_value(obj)
def test_can_set_value(self):
accessor = self.create_accessor()
obj = {'one': 'a', 'two': 'b'}
can_set = accessor.can_set_value(obj)
self.assertTrue(can_set)
def test_can_set_value_new(self):
accessor = self.create_accessor()
accessor.key = 'three'
obj = {'one': 'a', 'two': 'b'}
can_set = accessor.can_set_value(obj)
self.assertTrue(can_set)
def test_can_set_value_immutable(self):
accessor = self.create_accessor()
# TODO: eventually replace with frozenmap in 3.9
obj = MappingProxyType({'one': 'a', 'two': 'b'})
can_set = accessor.can_set_value(obj)
self.assertFalse(can_set)
def test_set_value(self):
accessor = self.create_accessor()
obj = {'one': 'a', 'two': 'b'}
accessor.set_value(obj, 'new_value')
self.assertEqual(obj['one'], 'new_value')
def test_set_value_new(self):
accessor = self.create_accessor()
accessor.key = 'three'
obj = {'one': 'a', 'two': 'b'}
accessor.set_value(obj, 'new_value')
self.assertEqual(obj['three'], 'new_value')
def test_set_value_error(self):
accessor = KeyDataAccessor()
accessor.key = 'one'
obj = MappingProxyType({'one': 'a', 'two': 'b'})
with self.assertRaises(DataViewSetError):
accessor.set_value(obj, 'new_value')
def test_key_updated(self):
accessor = self.create_accessor()
accessor.observe(self.accessor_observer, 'updated')
with self.assertTraitChanges(accessor, 'updated', count=1):
accessor.key = 2
self.assertEqual(self.accessor_event.new, (accessor, 'value'))
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