docs: testing: Mention to be cautious about using --regenerate-output

If the proposed changes also include changes to e.g. Dockerfile
generator potential regressions could not be caught by the test suite
if --regenerate-output is always used.

Signed-off-by: Erik Skultety <eskultet@redhat.com>

1 files changed, 3 insertions, 1 deletions

diff --git a/docs/testing.rst b/docs/testing.rst
index ef4ac15..425dce6 100644
--- a/docs/testing.rst
+++ b/docs/testing.rst
@@ -13,4 +13,6 @@ suite as
     $ python3 -m pytest --regenerate-output
 
 and the expected package data sets will be updated. You can then just grab the
-changes and add them to your commit.
+changes and add them to your commit. Beware though that if you test a buggy
+code this way the tests would not be able to catch regressions since the
+"correct" test output would now match the flawed output.