Backport PR #5708: create checkpoints dir in notebook subdirectories

closes  #5706

IPython/html/services/notebooks/filenbmanager.py

@@ -1,494 +1,482 b''
 """A notebook manager that uses the local file system for storage.
 
 Authors:
 
 * Brian Granger
 * Zach Sailer
 """
 
 #-----------------------------------------------------------------------------
 #  Copyright (C) 2011  The IPython Development Team
 #
 #  Distributed under the terms of the BSD License.  The full license is in
 #  the file COPYING, distributed as part of this software.
 #-----------------------------------------------------------------------------
 
 #-----------------------------------------------------------------------------
 # Imports
 #-----------------------------------------------------------------------------
 
 import io
 import os
 import glob
 import shutil
 
 from tornado import web
 
 from .nbmanager import NotebookManager
 from IPython.nbformat import current
 from IPython.utils.traitlets import Unicode, Bool, TraitError
 from IPython.utils.py3compat import getcwd
 from IPython.utils import tz
 from IPython.html.utils import is_hidden, to_os_path
 
 def sort_key(item):
     """Case-insensitive sorting."""
     return item['name'].lower()
 
 #-----------------------------------------------------------------------------
 # Classes
 #-----------------------------------------------------------------------------
 
 class FileNotebookManager(NotebookManager):
     
     save_script = Bool(False, config=True,
         help="""Automatically create a Python script when saving the notebook.
         
         For easier use of import, %run and %load across notebooks, a
         <notebook-name>.py script will be created next to any
         <notebook-name>.ipynb on each save.  This can also be set with the
         short `--script` flag.
         """
     )
     notebook_dir = Unicode(getcwd(), config=True)
     
     def _notebook_dir_changed(self, name, old, new):
         """Do a bit of validation of the notebook dir."""
         if not os.path.isabs(new):
             # If we receive a non-absolute path, make it absolute.
             self.notebook_dir = os.path.abspath(new)
             return
         if not os.path.exists(new) or not os.path.isdir(new):
             raise TraitError("notebook dir %r is not a directory" % new)
-
-    checkpoint_dir = Unicode(config=True,
-        help="""The location in which to keep notebook checkpoints
+    
+    checkpoint_dir = Unicode('.ipynb_checkpoints', config=True,
+        help="""The directory name in which to keep notebook checkpoints
+        
+        This is a path relative to the notebook's own directory.
         
-        By default, it is notebook-dir/.ipynb_checkpoints
+        By default, it is .ipynb_checkpoints
         """
     )
-    def _checkpoint_dir_default(self):
-        return os.path.join(self.notebook_dir, '.ipynb_checkpoints')
-    
-    def _checkpoint_dir_changed(self, name, old, new):
-        """do a bit of validation of the checkpoint dir"""
-        if not os.path.isabs(new):
-            # If we receive a non-absolute path, make it absolute.
-            abs_new = os.path.abspath(new)
-            self.checkpoint_dir = abs_new
-            return
-        if os.path.exists(new) and not os.path.isdir(new):
-            raise TraitError("checkpoint dir %r is not a directory" % new)
-        if not os.path.exists(new):
-            self.log.info("Creating checkpoint dir %s", new)
-            try:
-                os.mkdir(new)
-            except:
-                raise TraitError("Couldn't create checkpoint dir %r" % new)
     
     def _copy(self, src, dest):
         """copy src to dest
         
         like shutil.copy2, but log errors in copystat
         """
         shutil.copyfile(src, dest)
         try:
             shutil.copystat(src, dest)
         except OSError as e:
             self.log.debug("copystat on %s failed", dest, exc_info=True)
     
     def get_notebook_names(self, path=''):
         """List all notebook names in the notebook dir and path."""
         path = path.strip('/')
         if not os.path.isdir(self._get_os_path(path=path)):
             raise web.HTTPError(404, 'Directory not found: ' + path)
         names = glob.glob(self._get_os_path('*'+self.filename_ext, path))
         names = [os.path.basename(name)
                  for name in names]
         return names
 
     def path_exists(self, path):
         """Does the API-style path (directory) actually exist?
         
         Parameters
         ----------
         path : string
             The path to check. This is an API path (`/` separated,
             relative to base notebook-dir).
         
         Returns
         -------
         exists : bool
             Whether the path is indeed a directory.
         """
         path = path.strip('/')
         os_path = self._get_os_path(path=path)
         return os.path.isdir(os_path)
 
     def is_hidden(self, path):
         """Does the API style path correspond to a hidden directory or file?
         
         Parameters
         ----------
         path : string
             The path to check. This is an API path (`/` separated,
             relative to base notebook-dir).
         
         Returns
         -------
         exists : bool
             Whether the path is hidden.
         
         """
         path = path.strip('/')
         os_path = self._get_os_path(path=path)
         return is_hidden(os_path, self.notebook_dir)
 
     def _get_os_path(self, name=None, path=''):
         """Given a notebook name and a URL path, return its file system
         path.
 
         Parameters
         ----------
         name : string
             The name of a notebook file with the .ipynb extension
         path : string
             The relative URL path (with '/' as separator) to the named
             notebook.
 
         Returns
         -------
         path : string
             A file system path that combines notebook_dir (location where
             server started), the relative path, and the filename with the
             current operating system's url.
         """
         if name is not None:
             path = path + '/' + name
         return to_os_path(path, self.notebook_dir)
 
     def notebook_exists(self, name, path=''):
         """Returns a True if the notebook exists. Else, returns False.
 
         Parameters
         ----------
         name : string
             The name of the notebook you are checking.
         path : string
             The relative path to the notebook (with '/' as separator)
 
         Returns
         -------
         bool
         """
         path = path.strip('/')
         nbpath = self._get_os_path(name, path=path)
         return os.path.isfile(nbpath)
 
     # TODO: Remove this after we create the contents web service and directories are
     # no longer listed by the notebook web service.
     def list_dirs(self, path):
         """List the directories for a given API style path."""
         path = path.strip('/')
         os_path = self._get_os_path('', path)
         if not os.path.isdir(os_path):
             raise web.HTTPError(404, u'directory does not exist: %r' % os_path)
         elif is_hidden(os_path, self.notebook_dir):
             self.log.info("Refusing to serve hidden directory, via 404 Error")
             raise web.HTTPError(404, u'directory does not exist: %r' % os_path)
         dir_names = os.listdir(os_path)
         dirs = []
         for name in dir_names:
             os_path = self._get_os_path(name, path)
             if os.path.isdir(os_path) and not is_hidden(os_path, self.notebook_dir)\
                     and self.should_list(name):
                 try:
                     model = self.get_dir_model(name, path)
                 except IOError:
                     pass
                 dirs.append(model)
         dirs = sorted(dirs, key=sort_key)
         return dirs
 
     # TODO: Remove this after we create the contents web service and directories are
     # no longer listed by the notebook web service.
     def get_dir_model(self, name, path=''):
         """Get the directory model given a directory name and its API style path"""
         path = path.strip('/')
         os_path = self._get_os_path(name, path)
         if not os.path.isdir(os_path):
             raise IOError('directory does not exist: %r' % os_path)
         info = os.stat(os_path)
         last_modified = tz.utcfromtimestamp(info.st_mtime)
         created = tz.utcfromtimestamp(info.st_ctime)
         # Create the notebook model.
         model ={}
         model['name'] = name
         model['path'] = path
         model['last_modified'] = last_modified
         model['created'] = created
         model['type'] = 'directory'
         return model
 
     def list_notebooks(self, path):
         """Returns a list of dictionaries that are the standard model
         for all notebooks in the relative 'path'.
         
         Parameters
         ----------
         path : str
             the URL path that describes the relative path for the
             listed notebooks
         
         Returns
         -------
         notebooks : list of dicts
             a list of the notebook models without 'content'
         """
         path = path.strip('/')
         notebook_names = self.get_notebook_names(path)
         notebooks = [self.get_notebook(name, path, content=False)
                         for name in notebook_names if self.should_list(name)]
         notebooks = sorted(notebooks, key=sort_key)
         return notebooks
 
     def get_notebook(self, name, path='', content=True):
         """ Takes a path and name for a notebook and returns its model
         
         Parameters
         ----------
         name : str
             the name of the notebook
         path : str
             the URL path that describes the relative path for
             the notebook
             
         Returns
         -------
         model : dict
             the notebook model. If contents=True, returns the 'contents' 
             dict in the model as well.
         """
         path = path.strip('/')
         if not self.notebook_exists(name=name, path=path):
             raise web.HTTPError(404, u'Notebook does not exist: %s' % name)
         os_path = self._get_os_path(name, path)
         info = os.stat(os_path)
         last_modified = tz.utcfromtimestamp(info.st_mtime)
         created = tz.utcfromtimestamp(info.st_ctime)
         # Create the notebook model.
         model ={}
         model['name'] = name
         model['path'] = path
         model['last_modified'] = last_modified
         model['created'] = created
         model['type'] = 'notebook'
         if content:
             with io.open(os_path, 'r', encoding='utf-8') as f:
                 try:
                     nb = current.read(f, u'json')
                 except Exception as e:
                     raise web.HTTPError(400, u"Unreadable Notebook: %s %s" % (os_path, e))
             self.mark_trusted_cells(nb, name, path)
             model['content'] = nb
         return model
 
     def save_notebook(self, model, name='', path=''):
         """Save the notebook model and return the model with no content."""
         path = path.strip('/')
 
         if 'content' not in model:
             raise web.HTTPError(400, u'No notebook JSON data provided')
 
         # One checkpoint should always exist
         if self.notebook_exists(name, path) and not self.list_checkpoints(name, path):
             self.create_checkpoint(name, path)
 
         new_path = model.get('path', path).strip('/')
         new_name = model.get('name', name)
 
         if path != new_path or name != new_name:
             self.rename_notebook(name, path, new_name, new_path)
 
         # Save the notebook file
         os_path = self._get_os_path(new_name, new_path)
         nb = current.to_notebook_json(model['content'])
         
         self.check_and_sign(nb, new_name, new_path)
         
         if 'name' in nb['metadata']:
             nb['metadata']['name'] = u''
         try:
             self.log.debug("Autosaving notebook %s", os_path)
             with io.open(os_path, 'w', encoding='utf-8') as f:
                 current.write(nb, f, u'json')
         except Exception as e:
             raise web.HTTPError(400, u'Unexpected error while autosaving notebook: %s %s' % (os_path, e))
 
         # Save .py script as well
         if self.save_script:
             py_path = os.path.splitext(os_path)[0] + '.py'
             self.log.debug("Writing script %s", py_path)
             try:
                 with io.open(py_path, 'w', encoding='utf-8') as f:
                     current.write(nb, f, u'py')
             except Exception as e:
                 raise web.HTTPError(400, u'Unexpected error while saving notebook as script: %s %s' % (py_path, e))
 
         model = self.get_notebook(new_name, new_path, content=False)
         return model
 
     def update_notebook(self, model, name, path=''):
         """Update the notebook's path and/or name"""
         path = path.strip('/')
         new_name = model.get('name', name)
         new_path = model.get('path', path).strip('/')
         if path != new_path or name != new_name:
             self.rename_notebook(name, path, new_name, new_path)
         model = self.get_notebook(new_name, new_path, content=False)
         return model
 
     def delete_notebook(self, name, path=''):
         """Delete notebook by name and path."""
         path = path.strip('/')
         os_path = self._get_os_path(name, path)
         if not os.path.isfile(os_path):
             raise web.HTTPError(404, u'Notebook does not exist: %s' % os_path)
         
         # clear checkpoints
         for checkpoint in self.list_checkpoints(name, path):
             checkpoint_id = checkpoint['id']
             cp_path = self.get_checkpoint_path(checkpoint_id, name, path)
             if os.path.isfile(cp_path):
                 self.log.debug("Unlinking checkpoint %s", cp_path)
                 os.unlink(cp_path)
         
         self.log.debug("Unlinking notebook %s", os_path)
         os.unlink(os_path)
 
     def rename_notebook(self, old_name, old_path, new_name, new_path):
         """Rename a notebook."""
         old_path = old_path.strip('/')
         new_path = new_path.strip('/')
         if new_name == old_name and new_path == old_path:
             return
         
         new_os_path = self._get_os_path(new_name, new_path)
         old_os_path = self._get_os_path(old_name, old_path)
 
         # Should we proceed with the move?
         if os.path.isfile(new_os_path):
             raise web.HTTPError(409, u'Notebook with name already exists: %s' % new_os_path)
         if self.save_script:
             old_py_path = os.path.splitext(old_os_path)[0] + '.py'
             new_py_path = os.path.splitext(new_os_path)[0] + '.py'
             if os.path.isfile(new_py_path):
                 raise web.HTTPError(409, u'Python script with name already exists: %s' % new_py_path)
 
         # Move the notebook file
         try:
             shutil.move(old_os_path, new_os_path)
         except Exception as e:
             raise web.HTTPError(500, u'Unknown error renaming notebook: %s %s' % (old_os_path, e))
 
         # Move the checkpoints
         old_checkpoints = self.list_checkpoints(old_name, old_path)
         for cp in old_checkpoints:
             checkpoint_id = cp['id']
             old_cp_path = self.get_checkpoint_path(checkpoint_id, old_name, old_path)
             new_cp_path = self.get_checkpoint_path(checkpoint_id, new_name, new_path)
             if os.path.isfile(old_cp_path):
                 self.log.debug("Renaming checkpoint %s -> %s", old_cp_path, new_cp_path)
                 shutil.move(old_cp_path, new_cp_path)
 
         # Move the .py script
         if self.save_script:
             shutil.move(old_py_path, new_py_path)
   
     # Checkpoint-related utilities
     
     def get_checkpoint_path(self, checkpoint_id, name, path=''):
         """find the path to a checkpoint"""
         path = path.strip('/')
         basename, _ = os.path.splitext(name)
         filename = u"{name}-{checkpoint_id}{ext}".format(
             name=basename,
             checkpoint_id=checkpoint_id,
             ext=self.filename_ext,
         )
-        cp_path = os.path.join(path, self.checkpoint_dir, filename)
+        os_path = self._get_os_path(path=path)
+        cp_dir = os.path.join(os_path, self.checkpoint_dir)
+        if not os.path.exists(cp_dir):
+            os.mkdir(cp_dir)
+        cp_path = os.path.join(cp_dir, filename)
         return cp_path
 
     def get_checkpoint_model(self, checkpoint_id, name, path=''):
         """construct the info dict for a given checkpoint"""
         path = path.strip('/')
         cp_path = self.get_checkpoint_path(checkpoint_id, name, path)
         stats = os.stat(cp_path)
         last_modified = tz.utcfromtimestamp(stats.st_mtime)
         info = dict(
             id = checkpoint_id,
             last_modified = last_modified,
         )
         return info
         
     # public checkpoint API
     
     def create_checkpoint(self, name, path=''):
         """Create a checkpoint from the current state of a notebook"""
         path = path.strip('/')
         nb_path = self._get_os_path(name, path)
         # only the one checkpoint ID:
         checkpoint_id = u"checkpoint"
         cp_path = self.get_checkpoint_path(checkpoint_id, name, path)
         self.log.debug("creating checkpoint for notebook %s", name)
         if not os.path.exists(self.checkpoint_dir):
             os.mkdir(self.checkpoint_dir)
         self._copy(nb_path, cp_path)
         
         # return the checkpoint info
         return self.get_checkpoint_model(checkpoint_id, name, path)
     
     def list_checkpoints(self, name, path=''):
         """list the checkpoints for a given notebook
         
         This notebook manager currently only supports one checkpoint per notebook.
         """
         path = path.strip('/')
         checkpoint_id = "checkpoint"
-        path = self.get_checkpoint_path(checkpoint_id, name, path)
-        if not os.path.exists(path):
+        os_path = self.get_checkpoint_path(checkpoint_id, name, path)
+        if not os.path.exists(os_path):
             return []
         else:
             return [self.get_checkpoint_model(checkpoint_id, name, path)]
         
     
     def restore_checkpoint(self, checkpoint_id, name, path=''):
         """restore a notebook to a checkpointed state"""
         path = path.strip('/')
         self.log.info("restoring Notebook %s from checkpoint %s", name, checkpoint_id)
         nb_path = self._get_os_path(name, path)
         cp_path = self.get_checkpoint_path(checkpoint_id, name, path)
         if not os.path.isfile(cp_path):
             self.log.debug("checkpoint file does not exist: %s", cp_path)
             raise web.HTTPError(404,
                 u'Notebook checkpoint does not exist: %s-%s' % (name, checkpoint_id)
             )
         # ensure notebook is readable (never restore from an unreadable notebook)
         with io.open(cp_path, 'r', encoding='utf-8') as f:
             current.read(f, u'json')
         self._copy(cp_path, nb_path)
         self.log.debug("copying %s -> %s", cp_path, nb_path)
     
     def delete_checkpoint(self, checkpoint_id, name, path=''):
         """delete a notebook's checkpoint"""
         path = path.strip('/')
         cp_path = self.get_checkpoint_path(checkpoint_id, name, path)
         if not os.path.isfile(cp_path):
             raise web.HTTPError(404,
                 u'Notebook checkpoint does not exist: %s%s-%s' % (path, name, checkpoint_id)
             )
         self.log.debug("unlinking %s", cp_path)
         os.unlink(cp_path)
     
     def info_string(self):
         return "Serving notebooks from local directory: %s" % self.notebook_dir

IPython/html/services/notebooks/tests/test_nbmanager.py

@@ -1,306 +1,320 b''
 # coding: utf-8
 """Tests for the notebook manager."""
 from __future__ import print_function
 
 import logging
 import os
 
 from tornado.web import HTTPError
 from unittest import TestCase
 from tempfile import NamedTemporaryFile
 
 from IPython.nbformat import current
 
 from IPython.utils.tempdir import TemporaryDirectory
 from IPython.utils.traitlets import TraitError
 from IPython.html.utils import url_path_join
 
 from ..filenbmanager import FileNotebookManager
 from ..nbmanager import NotebookManager
 
 
 class TestFileNotebookManager(TestCase):
 
     def test_nb_dir(self):
         with TemporaryDirectory() as td:
             fm = FileNotebookManager(notebook_dir=td)
             self.assertEqual(fm.notebook_dir, td)
 
     def test_missing_nb_dir(self):
         with TemporaryDirectory() as td:
             nbdir = os.path.join(td, 'notebook', 'dir', 'is', 'missing')
             self.assertRaises(TraitError, FileNotebookManager, notebook_dir=nbdir)
 
     def test_invalid_nb_dir(self):
         with NamedTemporaryFile() as tf:
             self.assertRaises(TraitError, FileNotebookManager, notebook_dir=tf.name)
 
     def test_get_os_path(self):
         # full filesystem path should be returned with correct operating system
         # separators.
         with TemporaryDirectory() as td:
             nbdir = td
             fm = FileNotebookManager(notebook_dir=nbdir)
             path = fm._get_os_path('test.ipynb', '/path/to/notebook/')
             rel_path_list =  '/path/to/notebook/test.ipynb'.split('/')
             fs_path = os.path.join(fm.notebook_dir, *rel_path_list)
             self.assertEqual(path, fs_path)
 
             fm = FileNotebookManager(notebook_dir=nbdir)
             path = fm._get_os_path('test.ipynb')
             fs_path = os.path.join(fm.notebook_dir, 'test.ipynb')
             self.assertEqual(path, fs_path)
 
             fm = FileNotebookManager(notebook_dir=nbdir)
             path = fm._get_os_path('test.ipynb', '////')
             fs_path = os.path.join(fm.notebook_dir, 'test.ipynb')
             self.assertEqual(path, fs_path)
+    
+    def test_checkpoint_subdir(self):
+        subd = u'sub ∂ir'
+        cp_name = 'test-cp.ipynb'
+        with TemporaryDirectory() as td:
+            nbdir = td
+            os.mkdir(os.path.join(td, subd))
+            fm = FileNotebookManager(notebook_dir=nbdir)
+            cp_dir = fm.get_checkpoint_path('cp', 'test.ipynb', '/')
+            cp_subdir = fm.get_checkpoint_path('cp', 'test.ipynb', '/%s/' % subd)
+        self.assertNotEqual(cp_dir, cp_subdir)
+        self.assertEqual(cp_dir, os.path.join(nbdir, fm.checkpoint_dir, cp_name))
+        self.assertEqual(cp_subdir, os.path.join(nbdir, subd, fm.checkpoint_dir, cp_name))
+    
 
 class TestNotebookManager(TestCase):
     
     def setUp(self):
         self._temp_dir = TemporaryDirectory()
         self.td = self._temp_dir.name
         self.notebook_manager = FileNotebookManager(
             notebook_dir=self.td,
             log=logging.getLogger()
         )
     
     def tearDown(self):
         self._temp_dir.cleanup()
     
     def make_dir(self, abs_path, rel_path):
         """make subdirectory, rel_path is the relative path
         to that directory from the location where the server started"""
         os_path = os.path.join(abs_path, rel_path)
         try:
             os.makedirs(os_path)
         except OSError:
             print("Directory already exists: %r" % os_path)
     
     def add_code_cell(self, nb):
         output = current.new_output("display_data", output_javascript="alert('hi');")
         cell = current.new_code_cell("print('hi')", outputs=[output])
         if not nb.worksheets:
             nb.worksheets.append(current.new_worksheet())
         nb.worksheets[0].cells.append(cell)
     
     def new_notebook(self):
         nbm = self.notebook_manager
         model = nbm.create_notebook()
         name = model['name']
         path = model['path']
         
         full_model = nbm.get_notebook(name, path)
         nb = full_model['content']
         self.add_code_cell(nb)
         
         nbm.save_notebook(full_model, name, path)
         return nb, name, path
     
     def test_create_notebook(self):
         nm = self.notebook_manager
         # Test in root directory
         model = nm.create_notebook()
         assert isinstance(model, dict)
         self.assertIn('name', model)
         self.assertIn('path', model)
         self.assertEqual(model['name'], 'Untitled0.ipynb')
         self.assertEqual(model['path'], '')
 
         # Test in sub-directory
         sub_dir = '/foo/'
         self.make_dir(nm.notebook_dir, 'foo')
         model = nm.create_notebook(None, sub_dir)
         assert isinstance(model, dict)
         self.assertIn('name', model)
         self.assertIn('path', model)
         self.assertEqual(model['name'], 'Untitled0.ipynb')
         self.assertEqual(model['path'], sub_dir.strip('/'))
 
     def test_get_notebook(self):
         nm = self.notebook_manager
         # Create a notebook
         model = nm.create_notebook()
         name = model['name']
         path = model['path']
 
         # Check that we 'get' on the notebook we just created
         model2 = nm.get_notebook(name, path)
         assert isinstance(model2, dict)
         self.assertIn('name', model2)
         self.assertIn('path', model2)
         self.assertEqual(model['name'], name)
         self.assertEqual(model['path'], path)
 
         # Test in sub-directory
         sub_dir = '/foo/'
         self.make_dir(nm.notebook_dir, 'foo')
         model = nm.create_notebook(None, sub_dir)
         model2 = nm.get_notebook(name, sub_dir)
         assert isinstance(model2, dict)
         self.assertIn('name', model2)
         self.assertIn('path', model2)
         self.assertIn('content', model2)
         self.assertEqual(model2['name'], 'Untitled0.ipynb')
         self.assertEqual(model2['path'], sub_dir.strip('/'))
             
     def test_update_notebook(self):
         nm = self.notebook_manager
         # Create a notebook
         model = nm.create_notebook()
         name = model['name']
         path = model['path']
 
         # Change the name in the model for rename
         model['name'] = 'test.ipynb'
         model = nm.update_notebook(model, name, path)
         assert isinstance(model, dict)
         self.assertIn('name', model)
         self.assertIn('path', model)
         self.assertEqual(model['name'], 'test.ipynb')
 
         # Make sure the old name is gone
         self.assertRaises(HTTPError, nm.get_notebook, name, path)
 
         # Test in sub-directory
         # Create a directory and notebook in that directory
         sub_dir = '/foo/'
         self.make_dir(nm.notebook_dir, 'foo')
         model = nm.create_notebook(None, sub_dir)
         name = model['name']
         path = model['path']
         
         # Change the name in the model for rename
         model['name'] = 'test_in_sub.ipynb'
         model = nm.update_notebook(model, name, path)
         assert isinstance(model, dict)
         self.assertIn('name', model)
         self.assertIn('path', model)
         self.assertEqual(model['name'], 'test_in_sub.ipynb')
         self.assertEqual(model['path'], sub_dir.strip('/'))
         
         # Make sure the old name is gone
         self.assertRaises(HTTPError, nm.get_notebook, name, path)
 
     def test_save_notebook(self):
         nm = self.notebook_manager
         # Create a notebook
         model = nm.create_notebook()
         name = model['name']
         path = model['path']
 
         # Get the model with 'content'
         full_model = nm.get_notebook(name, path)
 
         # Save the notebook
         model = nm.save_notebook(full_model, name, path)
         assert isinstance(model, dict)
         self.assertIn('name', model)
         self.assertIn('path', model)
         self.assertEqual(model['name'], name)
         self.assertEqual(model['path'], path)
 
         # Test in sub-directory
         # Create a directory and notebook in that directory
         sub_dir = '/foo/'
         self.make_dir(nm.notebook_dir, 'foo')
         model = nm.create_notebook(None, sub_dir)
         name = model['name']
         path = model['path']
         model = nm.get_notebook(name, path)
 
         # Change the name in the model for rename
         model = nm.save_notebook(model, name, path)
         assert isinstance(model, dict)
         self.assertIn('name', model)
         self.assertIn('path', model)
         self.assertEqual(model['name'], 'Untitled0.ipynb')
         self.assertEqual(model['path'], sub_dir.strip('/'))
 
     def test_save_notebook_with_script(self):
         nm = self.notebook_manager
         # Create a notebook
         model = nm.create_notebook()
         nm.save_script = True
         model = nm.create_notebook()
         name = model['name']
         path = model['path']
 
         # Get the model with 'content'
         full_model = nm.get_notebook(name, path)
 
         # Save the notebook
         model = nm.save_notebook(full_model, name, path)
 
         # Check that the script was created
         py_path = os.path.join(nm.notebook_dir, os.path.splitext(name)[0]+'.py')
         assert os.path.exists(py_path), py_path
 
     def test_delete_notebook(self):
         nm = self.notebook_manager
         # Create a notebook
         nb, name, path = self.new_notebook()
         
         # Delete the notebook
         nm.delete_notebook(name, path)
         
         # Check that a 'get' on the deleted notebook raises and error
         self.assertRaises(HTTPError, nm.get_notebook, name, path)
     
     def test_copy_notebook(self):
         nm = self.notebook_manager
         path = u'å b'
         name = u'nb √.ipynb'
         os.mkdir(os.path.join(nm.notebook_dir, path))
         orig = nm.create_notebook({'name' : name}, path=path)
         
         # copy with unspecified name
         copy = nm.copy_notebook(name, path=path)
         self.assertEqual(copy['name'], orig['name'].replace('.ipynb', '-Copy0.ipynb'))
         
         # copy with specified name
         copy2 = nm.copy_notebook(name, u'copy 2.ipynb', path=path)
         self.assertEqual(copy2['name'], u'copy 2.ipynb')
     
     def test_trust_notebook(self):
         nbm = self.notebook_manager
         nb, name, path = self.new_notebook()
         
         untrusted = nbm.get_notebook(name, path)['content']
         assert not nbm.notary.check_cells(untrusted)
         
         # print(untrusted)
         nbm.trust_notebook(name, path)
         trusted = nbm.get_notebook(name, path)['content']
         # print(trusted)
         assert nbm.notary.check_cells(trusted)
     
     def test_mark_trusted_cells(self):
         nbm = self.notebook_manager
         nb, name, path = self.new_notebook()
         
         nbm.mark_trusted_cells(nb, name, path)
         for cell in nb.worksheets[0].cells:
             if cell.cell_type == 'code':
                 assert not cell.trusted
         
         nbm.trust_notebook(name, path)
         nb = nbm.get_notebook(name, path)['content']
         for cell in nb.worksheets[0].cells:
             if cell.cell_type == 'code':
                 assert cell.trusted
 
     def test_check_and_sign(self):
         nbm = self.notebook_manager
         nb, name, path = self.new_notebook()
         
         nbm.mark_trusted_cells(nb, name, path)
         nbm.check_and_sign(nb, name, path)
         assert not nbm.notary.check_signature(nb)
         
         nbm.trust_notebook(name, path)
         nb = nbm.get_notebook(name, path)['content']
         nbm.mark_trusted_cells(nb, name, path)
         nbm.check_and_sign(nb, name, path)
         assert nbm.notary.check_signature(nb)