gnucash maint: [utest-account.cpp] increase test coverage

[Christopher Lam]

Updated	 via  https://github.com/Gnucash/gnucash/commit/15852031 (commit)
	from  https://github.com/Gnucash/gnucash/commit/c3f8daaf (commit)



commit 15852031d4e99b90ab57022c9188d9edfc078137
Author: Christopher Lam <christopher.lck at gmail.com>
Date:   Mon Sep 13 23:43:42 2021 +0800

    [utest-account.cpp] increase test coverage
    
    adds getter/setter tests for
    
    xaccAccountSetLastNum
    xaccAccountSetTaxUSCode
    xaccAccountSetTaxUSPayerNameSource



Summary of changes:
 libgnucash/engine/test/utest-Account.cpp | 54 ++++++++++++++++++++++++++++++++
 1 file changed, 54 insertions(+)