module to mock DateTime->now calls during tests

 Getting the current time sometimes is not very helpful for testing scenarios.
 Instead, if you could obtain a known value during the runtime of a testcase
 will make your results predictable.
 .
 The Test::MockDateTime module allows faking a given date and time for the
 runtime of a subsequent code block. By default the on keyword is exported
 into the namespace of the test file. The date to get mocked must be in a
 format that is recognized by DateTime::Format::DateParse.