add deprecation warning when called with just a class name

[realFlowControl]

This adds the deprecation warning when calling PHPUnit with just a class name or class name and filename as discussed in issue #3859

• add deprecation warning
• fix unit tests

[codecov]

Codecov Report

Merging #3860 into master will increase coverage by 0.01%.
The diff coverage is 100%.

@@             Coverage Diff              @@
##             master    #3860      +/-   ##
============================================
+ Coverage      83.6%   83.62%   +0.01%     
- Complexity     3871     3875       +4     
============================================
  Files           151      151              
  Lines         10236    10241       +5     
============================================
+ Hits           8558     8564       +6     
+ Misses         1678     1677       -1

Impacted Files	Coverage Δ	Complexity Δ
src/TextUI/Command.php	74.95% <100%> (-0.46%)	217 <0> (+4)
src/Runner/StandardTestSuiteLoader.php	63.63% <0%> (+4.54%)	26% <0%> (ø)	⬇️
src/Util/FileLoader.php	100% <0%> (+10%)	8% <0%> (ø)	⬇️

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[realFlowControl]

Hey @sebastianbergmann,
this is ready to be merged, i will prepare the removal than in another PR.
/Flo

[realFlowControl]

@sebastianbergmann should i rebase this on 8.4, so that we have the deprecation warning in 8 already?

[sebastianbergmann]

This branch has conflicts that must be resolved. The target branch should be master so that we get this for PHPUnit 8.5 (December 2019).

[realFlowControl]

I rebased on master and solved the conflict, everything green now 😄

[realFlowControl]

@sebastianbergmann had you time reviewing this?

[MaXal]

I'm from the PhpStorm team.
Could you please advise a new recommended way to run a single class or a single method?
We run a single test using:
phpunit --filter "/(::testMe)( .*)?$/" MyTest /Users/maxim.kolmakov/PhpstormProjects/untitled42/MyTest.php
and a class:
phpunit MyTest /Users/maxim.kolmakov/PhpstormProjects/untitled42/MyTest.php

This is quite an essential functionality that a lot of people are using every day and we really don't want to lose it!

[sebastianbergmann]

@MaXal Using --filter would be the "right way":

• --filter MyTest will run all tests from MyTest
• --filter MyTest::testMe will run the single test testMe from test class MyTest

Also note that we are not deprecating/removing the ability to invoke the PHPUnit test runner with the path to a test case class sourcecode file. We are "just" deprecating/removing the ability to invoke it with only a test case class name.

[MaXal]

@sebastianbergmann Thank you for the answer! We will update the line we're using to run tests.