167 lines
4.6 KiB
Python
167 lines
4.6 KiB
Python
# This file is part of h5py, a Python interface to the HDF5 library.
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#
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# http://www.h5py.org
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#
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# Copyright 2008-2013 Andrew Collette and contributors
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#
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# License: Standard 3-clause BSD; see "license.txt" for full license terms
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# and contributor agreement.
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"""
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Attributes testing module
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Covers all operations which access the .attrs property, with the
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exception of data read/write and type conversion. Those operations
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are tested by module test_attrs_data.
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"""
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from __future__ import absolute_import
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import six
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import numpy as np
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import collections
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from ..common import TestCase, ut
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from h5py.highlevel import File
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from h5py import h5a, h5t
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from h5py.highlevel import AttributeManager
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class BaseAttrs(TestCase):
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def setUp(self):
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self.f = File(self.mktemp(), 'w')
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def tearDown(self):
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if self.f:
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self.f.close()
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class TestAccess(BaseAttrs):
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"""
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Feature: Attribute creation/retrieval via special methods
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"""
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def test_create(self):
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""" Attribute creation by direct assignment """
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self.f.attrs['a'] = 4.0
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self.assertEqual(list(self.f.attrs.keys()), ['a'])
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self.assertEqual(self.f.attrs['a'], 4.0)
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def test_overwrite(self):
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""" Attributes are silently overwritten """
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self.f.attrs['a'] = 4.0
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self.f.attrs['a'] = 5.0
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self.assertEqual(self.f.attrs['a'], 5.0)
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def test_rank(self):
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""" Attribute rank is preserved """
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self.f.attrs['a'] = (4.0, 5.0)
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self.assertEqual(self.f.attrs['a'].shape, (2,))
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self.assertArrayEqual(self.f.attrs['a'], np.array((4.0,5.0)))
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def test_single(self):
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""" Attributes of shape (1,) don't become scalars """
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self.f.attrs['a'] = np.ones((1,))
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out = self.f.attrs['a']
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self.assertEqual(out.shape, (1,))
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self.assertEqual(out[()], 1)
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def test_access_exc(self):
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""" Attempt to access missing item raises KeyError """
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with self.assertRaises(KeyError):
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self.f.attrs['a']
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class TestDelete(BaseAttrs):
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"""
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Feature: Deletion of attributes using __delitem__
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"""
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def test_delete(self):
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""" Deletion via "del" """
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self.f.attrs['a'] = 4.0
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self.assertIn('a', self.f.attrs)
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del self.f.attrs['a']
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self.assertNotIn('a', self.f.attrs)
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def test_delete_exc(self):
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""" Attempt to delete missing item raises KeyError """
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with self.assertRaises(KeyError):
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del self.f.attrs['a']
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class TestUnicode(BaseAttrs):
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"""
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Feature: Attributes can be accessed via Unicode or byte strings
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"""
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def test_ascii(self):
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""" Access via pure-ASCII byte string """
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self.f.attrs[b"ascii"] = 42
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out = self.f.attrs[b"ascii"]
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self.assertEqual(out, 42)
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def test_raw(self):
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""" Access via non-ASCII byte string """
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name = b"non-ascii\xfe"
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self.f.attrs[name] = 42
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out = self.f.attrs[name]
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self.assertEqual(out, 42)
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def test_unicode(self):
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""" Access via Unicode string with non-ascii characters """
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name = u"Omega" + six.unichr(0x03A9)
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self.f.attrs[name] = 42
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out = self.f.attrs[name]
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self.assertEqual(out, 42)
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class TestCreate(BaseAttrs):
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"""
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Options for explicit attribute creation
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"""
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def test_named(self):
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""" Attributes created from named types link to the source type object
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"""
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self.f['type'] = np.dtype('u8')
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self.f.attrs.create('x', 42, dtype=self.f['type'])
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self.assertEqual(self.f.attrs['x'], 42)
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aid = h5a.open(self.f.id, b'x')
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htype = aid.get_type()
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htype2 = self.f['type'].id
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self.assertEqual(htype, htype2)
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self.assertTrue(htype.committed())
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class TestMutableMapping(BaseAttrs):
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'''Tests if the registration of AttributeManager as a MutableMapping
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behaves as expected
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'''
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def test_resolution(self):
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assert issubclass(AttributeManager, collections.MutableMapping)
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assert isinstance(self.f.attrs, collections.MutableMapping)
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def test_validity(self):
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'''
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Test that the required functions are implemented.
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'''
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AttributeManager.__getitem__
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AttributeManager.__setitem__
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AttributeManager.__delitem__
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AttributeManager.__iter__
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AttributeManager.__len__
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class TestVlen(BaseAttrs):
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def test_vlen(self):
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a = np.array([np.arange(3), np.arange(4)],
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dtype=h5t.special_dtype(vlen=int))
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self.f.attrs['a'] = a
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self.assertArrayEqual(self.f.attrs['a'][0], a[0])
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