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# (C) Copyright 2005-2025 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!
""" Tests naming operations on PyFS contexts. """
# Standard library imports.
import os
import shutil
import unittest
# Enthought library imports.
from apptools.io import File
from apptools.naming.api import (
DirContext,
InvalidNameError,
NameAlreadyBoundError,
NameNotFoundError,
NotContextError,
PyFSContext,
)
class PyFSContextTestCase(unittest.TestCase):
""" Tests naming operations on PyFS contexts. """
###########################################################################
# 'TestCase' interface.
###########################################################################
def setUp(self):
""" Prepares the test fixture before each test method is called. """
if os.path.exists("data"):
shutil.rmtree("data", ignore_errors=True)
if os.path.exists("other"):
shutil.rmtree("other", ignore_errors=True)
os.mkdir("data")
os.mkdir("other")
self.context = PyFSContext(path="data")
self.context.create_subcontext("sub")
self.context.bind("x", 123)
self.context.bind("y", 321)
def tearDown(self):
""" Called immediately after each test method has been called. """
self.context = None
shutil.rmtree("data")
shutil.rmtree("other")
###########################################################################
# Tests.
###########################################################################
def test_initialization(self):
""" initialization of an existing context """
context = PyFSContext(path="data")
self.assertEqual(len(context.list_bindings("")), 3)
def test_initialization_with_empty_environment(self):
""" initialization with empty environmentt """
context = PyFSContext(path="other", environment={})
self.assertEqual(len(context.list_names("")), 0)
def test_bind(self):
""" pyfs context bind """
# Convenience.
context = self.context
sub = self.context.lookup("sub")
# Make sure that the sub-context is empty.
self.assertEqual(len(sub.list_bindings("")), 0)
# Empty name.
self.assertRaises(InvalidNameError, context.bind, "", 1)
# Bind a local file object.
f = File(os.path.join(sub.path, "foo.py"))
# f.create_file('print("foo!")\n')
context.bind("sub/foo.py", f)
self.assertEqual(len(sub.list_bindings("")), 1)
# Bind a reference to a non-local file.
f = File("/tmp")
context.bind("sub/tmp", f)
self.assertEqual(len(sub.list_bindings("")), 2)
self.assertEqual(context.lookup("sub/tmp").path, f.path)
# Bind a reference to a non-local context.
f = PyFSContext(path="other")
context.bind("sub/other", f)
self.assertEqual(len(sub.list_bindings("")), 3)
self.assertIn(f.path, context.lookup("sub/other").path)
# Bind a Python object.
context.bind("sub/a", 1)
self.assertEqual(len(sub.list_bindings("")), 4)
# Try to bind it again.
self.assertRaises(NameAlreadyBoundError, context.bind, "sub/a", 1)
def test_rebind(self):
""" pyfs context rebind """
# Convenience.
context = self.context
sub = self.context.lookup("sub")
# Make sure that the sub-context is empty.
self.assertEqual(len(sub.list_bindings("")), 0)
# Empty name.
self.assertRaises(InvalidNameError, context.rebind, "", 1)
# Bind a name.
context.bind("sub/a", 1)
self.assertEqual(len(sub.list_bindings("")), 1)
# Rebind it.
context.rebind("sub/a", 1)
self.assertEqual(len(sub.list_bindings("")), 1)
def test_unbind(self):
""" pyfs context unbind """
# Convenience.
context = self.context
sub = self.context.lookup("sub")
# Make sure that the sub-context is empty.
self.assertEqual(len(sub.list_bindings("")), 0)
# Empty name.
self.assertRaises(InvalidNameError, context.unbind, "")
# Bind a name.
context.bind("sub/a", 1)
self.assertEqual(len(sub.list_bindings("")), 1)
# Unbind it.
context.unbind("sub/a")
self.assertEqual(len(sub.list_bindings("")), 0)
# Try to unbind a non-existent name.
self.assertRaises(NameNotFoundError, context.unbind, "sub/b")
def test_rename(self):
""" multi-context rename """
# Convenience.
context = self.context
sub = self.context.lookup("sub")
# Make sure that the sub-context is empty.
self.assertEqual(len(sub.list_bindings("")), 0)
# Empty name.
self.assertRaises(InvalidNameError, context.rename, "", "x")
self.assertRaises(InvalidNameError, context.rename, "x", "")
# Bind a name.
context.bind("sub/a", 1)
self.assertEqual(len(sub.list_bindings("")), 1)
# Rename it.
context.rename("sub/a", "sub/b")
self.assertEqual(len(sub.list_bindings("")), 1)
# Lookup using the new name.
self.assertEqual(context.lookup("sub/b"), 1)
# Lookup using the old name.
self.assertRaises(NameNotFoundError, context.lookup, "sub/a")
def test_lookup(self):
""" pyfs context lookup """
# Convenience.
context = self.context
sub = self.context.lookup("sub")
# Make sure that the sub-context is empty.
self.assertEqual(len(sub.list_bindings("")), 0)
# Bind a file object.
f = File(os.path.join(sub.path, "foo.py"))
# f.create_file('print("foo!")\n')
context.bind("sub/foo.py", f)
self.assertEqual(len(sub.list_bindings("")), 1)
# Look it up.
self.assertEqual(context.lookup("sub/foo.py").path, f.path)
# Bind a Python object.
context.bind("sub/a", 1)
self.assertEqual(len(sub.list_bindings("")), 2)
# Look it up.
self.assertEqual(context.lookup("sub/a"), 1)
# Looking up the Empty name returns the context itself.
self.assertEqual(context.lookup(""), context)
# Non-existent name.
self.assertRaises(NameNotFoundError, context.lookup, "sub/b")
def test_create_subcontext(self):
""" pyfs context create sub-context """
# Convenience.
context = self.context
sub = self.context.lookup("sub")
# Make sure that the sub-context is empty.
self.assertEqual(len(sub.list_bindings("")), 0)
# Empty name.
self.assertRaises(InvalidNameError, context.create_subcontext, "")
# Create a sub-context.
context.create_subcontext("sub/a")
self.assertEqual(len(sub.list_bindings("")), 1)
self.assertTrue(os.path.isdir(os.path.join(sub.path, "a")))
# Try to bind it again.
self.assertRaises(
NameAlreadyBoundError, context.create_subcontext, "sub/a"
)
def test_destroy_subcontext(self):
""" single context destroy sub-context """
# Convenience.
context = self.context
sub = self.context.lookup("sub")
# Make sure that the sub-context is empty.
self.assertEqual(len(sub.list_bindings("")), 0)
# Empty name.
self.assertRaises(InvalidNameError, context.destroy_subcontext, "")
# Create a sub-context.
context.create_subcontext("sub/a")
self.assertEqual(len(sub.list_bindings("")), 1)
# Destroy it.
context.destroy_subcontext("sub/a")
self.assertEqual(len(sub.list_bindings("")), 0)
self.assertTrue(not os.path.isdir(os.path.join(sub.path, "a")))
# Bind a name.
context.bind("sub/a", 1)
self.assertEqual(len(sub.list_bindings("")), 1)
# Try to destroy it.
self.assertRaises(NotContextError, context.destroy_subcontext, "sub/a")
# Try to destroy a non-existent name.
self.assertRaises(
NameNotFoundError, context.destroy_subcontext, "sub/b"
)
def test_get_attributes(self):
""" get attributes """
# Convenience.
context = self.context
sub = self.context.lookup("sub")
self.assertIsInstance(sub, DirContext)
#### Generic name resolution tests ####
# Non-existent name.
self.assertRaises(NameNotFoundError, context.get_attributes, "xx")
# Attempt to resolve via a non-existent context.
self.assertRaises(NameNotFoundError, context.get_attributes, "xx/a")
# Attempt to resolve via an existing name that is not a context.
context.bind("sub/a", 1)
self.assertEqual(len(sub.list_bindings("")), 1)
self.assertRaises(NotContextError, context.get_attributes, "sub/a/x")
#### Operation specific tests ####
# Attributes of the root context.
attributes = context.get_attributes("")
self.assertEqual(len(attributes), 0)
# Attributes of a sub-context.
attributes = context.get_attributes("sub")
self.assertEqual(len(attributes), 0)
def test_set_get_attributes(self):
""" get and set attributes """
defaults = {"colour": "blue"}
# Convenience.
context = self.context
sub = self.context.lookup("sub")
self.assertIsInstance(sub, DirContext)
#### Generic name resolution tests ####
# Non-existent name.
self.assertRaises(
NameNotFoundError, context.set_attributes, "xx", defaults
)
# Attempt to resolve via a non-existent context.
self.assertRaises(
NameNotFoundError, context.set_attributes, "xx/a", defaults
)
# Attempt to resolve via an existing name that is not a context.
context.bind("sub/a", 1)
self.assertEqual(len(sub.list_bindings("")), 1)
self.assertRaises(
NotContextError, context.set_attributes, "sub/a/xx", defaults
)
#### Operation specific tests ####
# Attributes of the root context.
attributes = self.context.get_attributes("")
self.assertEqual(len(attributes), 0)
# Set the attributes.
context.set_attributes("", defaults)
attributes = context.get_attributes("")
self.assertEqual(len(attributes), 1)
self.assertEqual(attributes["colour"], "blue")
# Attributes of a sub-context.
attributes = context.get_attributes("sub")
self.assertEqual(len(attributes), 0)
# Set the attributes.
context.set_attributes("sub", defaults)
attributes = context.get_attributes("sub")
self.assertEqual(len(attributes), 1)
self.assertEqual(attributes["colour"], "blue")
def test_namespace_name(self):
""" get the name of a context within its namespace. """
# Convenience.
context = self.context
sub = self.context.lookup("sub")
self.assertIsInstance(sub, DirContext)
self.assertEqual(context.namespace_name, "data")
self.assertEqual(sub.namespace_name, "data/sub")
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