Changes in PHPUnit 9.0

All notable changes of the PHPUnit 9.0 release series are documented in this file using the Keep a CHANGELOG principles.

9.0.0 - 2020-02-07

Implemented #3630: Deprecate support for ClassName<*> as values for @covers and @uses annotations (this deprecation is not implemented in code, you will not get a deprecation warning when you use this feature in PHPUnit 9)
Implemented #3770: Deprecate MockBuilder::setMethods() (this deprecation is not implemented in code, you will not get a deprecation warning when you use this feature in PHPUnit 9)
Implemented #3746: Improve developer experience of global wrapper functions for assertions
Implemented #3914: Refactor PHPUnit\Util\Configuration
Implemented #4024: Make PHPUnit\TextUI\ResultPrinter an interface
Multiple test case classes (classes that extend TestCase) that are declared in a single sourcecode file are no longer supported

Implemented #3333: Remove annotation(s) for expecting exceptions
Implemented #3334: Drop support for PHP 7.2
Implemented #3339: Remove assertions (and helper methods) that operate on (non-public) attributes
Implemented #3342: Remove optional parameters of assertEquals() and assertNotEquals()
Implemented #3370: Remove assertInternalType() and assertNotInternalType()
Implemented #3426: Clean up assertContains() and assertNotContains()
Implemented #3495: Remove assertArraySubset()
Implemented #3523: Remove the setUseErrorHandler() method
Implemented #3776: Deprecate expectException(PHPUnit\Framework\Error\*)
Implemented #3951: Remove optional parameters of assertFileEquals() etc.
Implemented #3956: Remove support for doubling multiple interfaces
Implemented #3957: Remove expectExceptionMessageRegExp()
Implemented #4012: Remove class name as CLI argument