reworked notifications to the test system

No globals required anymore, somewhat more general approach to sending
data to the test system. Clean access through keys.

no need for a global output buffer

clean up of the TestRequest object

reformatting
fixing of doc blocks
making internal vars protected

Test code for workflow 'show - sectionedit - save/cancel' (with modifications in test classes and 'send_redirect()' and 'act_dispatch()'.

response on review

allow tests against ajax requests

support phpunit 5 and 6

We still need 5 to test on old php versions, but travis uses 6 for newer
PHP versions (and 5 may break on those).

Luckily both versions aren't that far apart, yet. This adds

support phpunit 5 and 6

We still need 5 to test on old php versions, but travis uses 6 for newer
PHP versions (and 5 may break on those).

Luckily both versions aren't that far apart, yet. This adds a thin
adapter class when running on 6.

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PHPUnit 6 now only supports namespaced classes

However those classes are already supported in PHP 5.7 so we can switch
to them without breaking backward-compatibility.

new helper method waitForTick() in DokuWikiTest

Some of our tests require that at least one second has passed before
they can continue because our revisions depend on the Unix Timestamp.

Currently

new helper method waitForTick() in DokuWikiTest

Some of our tests require that at least one second has passed before
they can continue because our revisions depend on the Unix Timestamp.

Currently we use a sleep(1) for this. However this always waits a whole
second, even if the next second is already much closer or maybe already
here - especially when some processing has been done since the last
operation.

This new method waits for the next second by checking the time every
10th of a second. This might speed up some of our tests a bit.

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fix tests for newer PHPUnit. fixes #1643

getMock is deprecated in new PHPUnit versions and createMock is the
recommended replacement. However that one is not available in older
PHPUnit releases. Sin

fix tests for newer PHPUnit. fixes #1643

getMock is deprecated in new PHPUnit versions and createMock is the
recommended replacement. However that one is not available in older
PHPUnit releases. Since we still support older PHP releases we have to
support older PHPUnit releases as well.

This add some compatibility functions to our TestCase class and replaces
all calls to getMock. Tested with PHPUnit 4.6.6 and 5.5.0.

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Fixed broken links to php.net and redirecting pages to php.net

reload some config settings after the conf reset in DokuWikiTest::setUp