Commit [1] fixed a bug in the legacy graph view and introduced a
test. This was done while we were re-writting the graph view in
owl. This commit adds the test added by [1] in the new graph test
suite.
[1] 11eb4542ab
closes odoo/odoo#76778
X-original-commit: c5ac7fc541cbdb0a7fe7c9d01849bcc9a615a78c
Related: odoo/enterprise#20992
Signed-off-by: Géry Debongnie (ged) <ged@openerp.com>