While testing the changed unit tests one by one, the
payment/tests/helper_test.php was failing because of a mismatch
between the dataProvider data and the param type.
That made me think why that error was not popping in complete runs
and the answer is that the new (3.10) subsystem is not in the
phpunit.xml.dist file.
Hence, adding it and fixing the dataProvider mismatch.
Finally, it has been detected that some old ICU versions (< 62)
have an incorrect behaviour, not adding the required non-breaking
white-space between the currency abbreviation and the value. So
we are skipping some payment tests if that's found.
Eloy Lafuente (stronk7)
935742572d