`PagedTiffHandlerTest::normaliseParamsBooleanTest` is not run by phpunit, because it does not start with test*
The dataProvider normaliseProvider is using some member variable, but there are init in setUp, which is called after the data provider.
Needs some refactoring as tests fail if run
```
php tests/phpunit/phpunit.php extensions/PagedTiffHandler/tests/
#!/usr/bin/env php
Using PHP 7.1.11-0ubuntu0.17.10.1
PHPUnit 4.8.36 by Sebastian Bergmann and contributors.
..............EEEEE....
Time: 9.04 seconds, Memory: 46.00MB
There were 5 errors:
1) PagedTiffHandlerTest::testNormaliseParamsBoolean with data set #0 (null, array(), false, 'no width')
Error: Call to a member function getMetadata() on null
/var/www/wiki/mediawiki/extensions/PagedTiffHandler/PagedTiffHandler_body.php:743
/var/www/wiki/mediawiki/extensions/PagedTiffHandler/PagedTiffHandler_body.php:480
/var/www/wiki/mediawiki/extensions/PagedTiffHandler/PagedTiffHandler_body.php:255
/var/www/wiki/mediawiki/extensions/PagedTiffHandler/tests/PagedTiffHandlerTest.php:336
/var/www/wiki/mediawiki/core/tests/phpunit/MediaWikiTestCase.php:420
/var/www/wiki/mediawiki/core/maintenance/doMaintenance.php:94
2) PagedTiffHandlerTest::testNormaliseParamsBoolean with data set #1 (null, array('50'), true, 'normal scale')
Error: Call to a member function getMetadata() on null
/var/www/wiki/mediawiki/extensions/PagedTiffHandler/PagedTiffHandler_body.php:743
/var/www/wiki/mediawiki/extensions/PagedTiffHandler/PagedTiffHandler_body.php:480
/var/www/wiki/mediawiki/extensions/PagedTiffHandler/PagedTiffHandler_body.php:255
/var/www/wiki/mediawiki/extensions/PagedTiffHandler/tests/PagedTiffHandlerTest.php:336
/var/www/wiki/mediawiki/core/tests/phpunit/MediaWikiTestCase.php:420
/var/www/wiki/mediawiki/core/maintenance/doMaintenance.php:94
3) PagedTiffHandlerTest::testNormaliseParamsBoolean with data set #2 (null, array('100000000'), true, 'normal scale')
Error: Call to a member function getMetadata() on null
/var/www/wiki/mediawiki/extensions/PagedTiffHandler/PagedTiffHandler_body.php:743
/var/www/wiki/mediawiki/extensions/PagedTiffHandler/PagedTiffHandler_body.php:480
/var/www/wiki/mediawiki/extensions/PagedTiffHandler/PagedTiffHandler_body.php:255
/var/www/wiki/mediawiki/extensions/PagedTiffHandler/tests/PagedTiffHandlerTest.php:336
/var/www/wiki/mediawiki/core/tests/phpunit/MediaWikiTestCase.php:420
/var/www/wiki/mediawiki/core/maintenance/doMaintenance.php:94
4) PagedTiffHandlerTest::testNormaliseParamsBoolean with data set #3 (null, array('50'), false, 'Image > max area')
Error: Call to a member function getMetadata() on null
/var/www/wiki/mediawiki/extensions/PagedTiffHandler/PagedTiffHandler_body.php:743
/var/www/wiki/mediawiki/extensions/PagedTiffHandler/PagedTiffHandler_body.php:480
/var/www/wiki/mediawiki/extensions/PagedTiffHandler/PagedTiffHandler_body.php:255
/var/www/wiki/mediawiki/extensions/PagedTiffHandler/tests/PagedTiffHandlerTest.php:336
/var/www/wiki/mediawiki/core/tests/phpunit/MediaWikiTestCase.php:420
/var/www/wiki/mediawiki/core/maintenance/doMaintenance.php:94
5) PagedTiffHandlerTest::testNormaliseParamsBoolean with data set #4 (null, array('50'), true, 'page out of range')
Error: Call to a member function getMetadata() on null
/var/www/wiki/mediawiki/extensions/PagedTiffHandler/PagedTiffHandler_body.php:743
/var/www/wiki/mediawiki/extensions/PagedTiffHandler/PagedTiffHandler_body.php:480
/var/www/wiki/mediawiki/extensions/PagedTiffHandler/PagedTiffHandler_body.php:509
/var/www/wiki/mediawiki/extensions/PagedTiffHandler/PagedTiffHandler_body.php:253
/var/www/wiki/mediawiki/extensions/PagedTiffHandler/tests/PagedTiffHandlerTest.php:336
/var/www/wiki/mediawiki/core/tests/phpunit/MediaWikiTestCase.php:420
/var/www/wiki/mediawiki/core/maintenance/doMaintenance.php:94
FAILURES!
Tests: 23, Assertions: 120, Errors: 5.
```