--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/tests/e2e/libervia-cli/conftest.py	Fri Apr 16 18:32:34 2021 +0200
@@ -0,0 +1,169 @@
+#!/usr/bin/env python3
+
+# Libervia: an XMPP client
+# Copyright (C) 2009-2021 Jérôme Poisson (goffi@goffi.org)
+
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+import sys
+import os
+import tempfile
+from pathlib import Path
+from textwrap import dedent
+import json
+import pytest
+from sh import li
+
+
+class LiberviaCliJson:
+    """li like commands parsing result as JSON"""
+
+    def __init__(self):
+        self.subcommands = []
+
+    def __call__(self, *args, **kwargs):
+        args = self.subcommands + list(args)
+        self.subcommands.clear()
+        kwargs['output'] = 'json_raw'
+        kwargs['_tty_out'] = False
+        cmd = li(*args, **kwargs)
+        return json.loads(cmd.stdout)
+
+    def __getattr__(self, name):
+        if name.startswith('_'):
+            # no li subcommand starts with a "_",
+            # and pytest uses some attributes with this name scheme
+            return super().__getattr__(name)
+        self.subcommands.append(name)
+        return self
+
+
+class LiberviaCliElt(LiberviaCliJson):
+    """li like commands parsing result as domishElement"""
+
+    def __init__(self):
+        super().__init__()
+        from sat.tools.xml_tools import ElementParser
+        self.parser = ElementParser()
+
+    def __call__(self, *args, **kwargs):
+        args = self.subcommands + list(args)
+        self.subcommands.clear()
+        kwargs['output'] = 'xml_raw'
+        kwargs['_tty_out'] = False
+        cmd = li(*args, **kwargs)
+        return self.parser(cmd.stdout.decode().strip())
+
+
+class Editor:
+
+    def __init__(self):
+        # temporary directory will be deleted Automatically when this object will be
+        # destroyed
+        self.tmp_dir_obj = tempfile.TemporaryDirectory(prefix="libervia_e2e_test_editor_")
+        self.tmp_dir_path = Path(self.tmp_dir_obj.name)
+        if not sys.executable:
+            raise Exception("Can't find python executable")
+        self.editor_set = False
+        self.editor_path = self.tmp_dir_path / "editor.py"
+        self.ori_content_path = self.tmp_dir_path / "original_content"
+        self.new_content_path = self.tmp_dir_path / "new_content"
+        self.base_script = dedent(f"""\
+            #!{sys.executable}
+            import sys
+
+            def content_filter(content):
+                return {{content_filter}}
+
+            with open(sys.argv[1], 'r+') as f:
+                original_content = f.read()
+                f.seek(0)
+                new_content = content_filter(original_content)
+                f.write(new_content)
+                f.truncate()
+
+            with open("{self.ori_content_path}", "w") as f:
+                f.write(original_content)
+
+            with open("{self.new_content_path}", "w") as f:
+                f.write(new_content)
+            """
+        )
+        self._env = os.environ.copy()
+        self._env["EDITOR"] = str(self.editor_path)
+
+    def set_filter(self, content_filter: str = "content"):
+        """Python code to modify original content
+
+        The code will be applied to content received by editor.
+        The original content received by editor is in the "content" variable.
+        If filter_ is not specified, original content is written unmodified.
+        Code must be on a single line.
+        """
+        if '\n' in content_filter:
+            raise ValueError("new lines can't be used in filter_")
+        with self.editor_path.open('w') as f:
+            f.write(self.base_script.format(content_filter=content_filter))
+        self.editor_path.chmod(0o700)
+        self.editor_set = True
+
+    @property
+    def env(self):
+        """Get environment variable with the editor set"""
+        if not self.editor_set:
+            self.set_filter()
+        return self._env
+
+    @property
+    def original_content(self):
+        """Last content received by editor, before any modification
+
+        returns None if editor has not yet been called
+        """
+        try:
+            with self.ori_content_path.open() as f:
+                return f.read()
+        except FileNotFoundError:
+            return None
+
+    @property
+    def new_content(self):
+        """Last content writen by editor
+
+        This is the final content, after filter has been applied to original content
+        returns None if editor has not yet been called
+        """
+        try:
+            with self.new_content_path.open() as f:
+                return f.read()
+        except FileNotFoundError:
+            return None
+
+
+@pytest.fixture(scope="session")
+def li_json():
+    """Run li with "json_raw" output, and returns the parsed value"""
+    return LiberviaCliJson()
+
+
+@pytest.fixture(scope="session")
+def li_elt():
+    """Run li with "xml_raw" output, and returns the parsed value"""
+    return LiberviaCliElt()
+
+
+@pytest.fixture()
+def editor():
+    """Create a fake editor to automatise edition from CLI"""
+    return Editor()