date_default_timezone_set('Europe/Helsinki'); breaks further tests about php-rrule HOT 4 CLOSED

Ok I'll have a look but I'm not sure what you mean by "non-isolated environment". Do you mean you are running the tests of this library within some other tests? I'm curious to know your use case for this.

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yeah exactly, I run all tests at once in jenkins

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I'm still not sure I understand why you are doing this. Are you running all the tests of all the 3rd party librairies of your project? How can they all run within the same PHP process without failing or conflicting with each others? Just being curious because I've never heard of such a use case before.

Anyway, the reason why it's done that way (and not in setUpBeforeClass like I originally intended it) is because in PHPUnit's data providers are called before setUpBeforeClass (it's a documented behaviour). Since the data providers in this test suite create a lot of DateTime objects, the default timezone must be set before they are executed... As far as I know, this means setting it globally (granted, this could be in the bootstrap file instead).

I'm open to suggestions if you know a clean way how to solve this.

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Closing this ticket, given that it doesn't seem to be a real problem.

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