This reduces confidence in the test. There is no guruantee that
it won't return the same value twice during the duration of a full
PHPUnit run of all test suites, whether twice in a row or 20 minutes
apart.
For a test that needs a string of any kind, use an explicit, consinstent
and cheap literal value.
For a test that specifically needs some kind of uniqueness compared to
something else within the same test case, do so explicitly.
Tests that require something globally unique (for some undefined/vague
definition of "global") were not found, and should not exist anyway.
Also, in libs/objectcache tests, fix order of parameters in some
assertions (expected first, then actual), and use assertFalse/assertSame
instead of assertEqual for cases where false is expected to remove
tolerance of other loosely equal values.
Change-Id: Ifc60e88178da471330b94bfbf12e2731d2efc77d
Non-breaking change. Remaining uses are public interfaces (a constant, two
globals, a config sub-parameter, SQL queries, storage function names), one i18n
message key, and a whole lot of maintenance scripts with calls to the deprecated
function wfWaitForSlaves().
Change-Id: I6ee5ca92ccf6a80c08f53d9efe38ebb4b05064d7
