From ed17bc171046a15f03c890687db8eb9652513bd9 Mon Sep 17 00:00:00 2001
From: Sven-Hendrik Haase <svenstaro@gmail.com>
Date: Thu, 16 Mar 2017 20:56:12 +0100
Subject: [PATCH] Add test to showcase that printing a traceback works

---
 tests/test_cli.py | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/tests/test_cli.py b/tests/test_cli.py
index 313a34d2..82c69f93 100644
--- a/tests/test_cli.py
+++ b/tests/test_cli.py
@@ -191,3 +191,20 @@ def test_flaskgroup():
     result = runner.invoke(cli, ['test'])
     assert result.exit_code == 0
     assert result.output == 'flaskgroup\n'
+
+
+def test_print_exceptions():
+    """Print the stacktrace if the CLI."""
+    def create_app(info):
+        raise Exception("oh no")
+        return Flask("flaskgroup")
+
+    @click.group(cls=FlaskGroup, create_app=create_app)
+    def cli(**params):
+        pass
+
+    runner = CliRunner()
+    result = runner.invoke(cli, ['--help'])
+    assert result.exit_code == 0
+    assert 'Exception: oh no' in result.output
+    assert 'Traceback' in result.output