added first basic CLI test

tests/conftest.py

@@ -0,0 +1,84 @@
+import os
+
+import deltachat
+import pytest
+from _pytest.pytester import LineMatcher
+
+
+class ClickRunner:
+    def __init__(self, main):
+        from click.testing import CliRunner
+
+        self.runner = CliRunner()
+        self._main = main
+        self._rootargs = []
+
+    def set_basedir(self, account_dir):
+        self._rootargs.insert(0, "--basedir")
+        self._rootargs.insert(1, account_dir)
+
+    def run_ok(self, args, fnl=None, input=None):
+        __tracebackhide__ = True
+        argv = self._rootargs + args
+        # we use our nextbackup helper to cache account creation
+        # unless --no-test-cache is specified
+        res = self.runner.invoke(self._main, argv, catch_exceptions=False, input=input)
+        if res.exit_code != 0:
+            print(res.output)
+            raise Exception("cmd exited with %d: %s" % (res.exit_code, argv))
+        return _perform_match(res.output, fnl)
+
+    def run_fail(self, args, fnl=None, input=None, code=None):
+        __tracebackhide__ = True
+        argv = self._rootargs + args
+        res = self.runner.invoke(self._main, argv, catch_exceptions=False, input=input)
+        if res.exit_code == 0 or (code is not None and res.exit_code != code):
+            print(res.output)
+            raise Exception(
+                "got exit code {!r}, expected {!r}, output: {}".format(
+                    res.exit_code,
+                    code,
+                    res.output,
+                ),
+            )
+        return _perform_match(res.output, fnl)
+
+
+def _perform_match(output, fnl):
+    __tracebackhide__ = True
+    if fnl:
+        lm = LineMatcher(output.splitlines())
+        lines = [x.strip() for x in fnl.strip().splitlines()]
+        try:
+            lm.fnmatch_lines(lines)
+        except Exception:
+            print(output)
+            raise
+    return output
+
+
+@pytest.fixture
+def cmd():
+    """invoke a command line subcommand."""
+    from teams_bot.cli import teams_bot
+
+    return ClickRunner(teams_bot)
+
+
+@pytest.fixture
+def tmp_file_path(request, tmpdir):
+    if request.param:
+        path = str(tmpdir) + "/" + str(request.param)
+        with open(path, "w+", encoding="utf-8") as f:
+            f.write("test")
+        return path
+
+
+@pytest.fixture
+def chat(tmpdir):
+    token = os.getenv("DCC_NEW_TMP")
+    ac = deltachat.Account(str(tmpdir) + "/db.sqlite")
+    # create bot account from token
+    # create chat partner from token
+    # initiate a chat between them
+    # return the chat object

tests/test_cli.py

@@ -0,0 +1,10 @@
+def test_help(cmd):
+    cmd.run_ok(
+        [],
+        """
+        Usage: teams-bot [OPTIONS] COMMAND [ARGS]...
+        * -h, --help  Show this message and exit.
+        * init  Configure bot; create crew; add user to crew by scanning a QR code.
+        """
+    )
+