gnucash stable: [utest-Transaction.cpp] add test_xaccTransGetDateDue tests

[Christopher Lam]

Updated	 via  https://github.com/Gnucash/gnucash/commit/7f82098c (commit)
	from  https://github.com/Gnucash/gnucash/commit/584bc611 (commit)



commit 7f82098c11ceb92df0347746ac9eb410c1c62afa
Author: Christopher Lam <christopher.lck at gmail.com>
Date:   Sat Jun 28 17:51:27 2025 +0800

    [utest-Transaction.cpp] add test_xaccTransGetDateDue tests
    
    including currently (arguably) buggy behaviour if kvp time64 is 0...



Summary of changes:
 libgnucash/engine/test/utest-Transaction.cpp | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)