def save(self, filename=None):
        filename = Path(filename) if filename is not None else self.filename
        with filename.open("w") as f:
            f.write(self.yaml)
def setUp(self):
        base.TestCase.setUp(self)
        # Create some test documents with an item
        admin = {
            'email': 'admin@email.com',
            'login': 'adminlogin',
            'firstName': 'Admin',
            'lastName': 'Last',
            'password': 'adminpassword',
            'admin': True
        }
        self.admin = self.model('user').createUser(**admin)

        user = {
            'email': 'good@email.com',
            'login': 'goodlogin',
            'firstName': 'First',
            'lastName': 'Last',
            'password': 'goodpassword',
            'admin': False
        }
        self.user = self.model('user').createUser(**user)

        # Track folder, item, and setting provenance initially
        self.model('setting').set(
            constants.PluginSettings.PROVENANCE_RESOURCES, 'folder,setting')

        coll1 = {
            'name': 'Test Collection',
            'description': 'test coll',
            'public': True,
            'creator': self.admin
        }
        self.coll1 = self.model('collection').createCollection(**coll1)

        folder1 = {
            'parent': self.coll1,
            'parentType': 'collection',
            'name': 'Public test folder',
            'creator': self.admin

        }
        self.folder1 = self.model('folder').createFolder(**folder1)
        self.model('folder').setUserAccess(
            self.folder1, self.user, level=AccessType.WRITE, save=False)
        self.model('folder').setPublic(self.folder1, True, save=True)

        item1 = {
            'name': 'Public object',
            'creator': self.admin,
            'folder': self.folder1
        }
        self.item1 = self.model('item').createItem(**item1)