tests: adds collision tests

tests/.snapshots/allows-to-run-a-directory.txt

@@ -1,7 +1,11 @@
+   WARN  Tests\Fixtures\CollisionTest
+  - error
+  - success
+
    PASS  Tests\Fixtures\DirectoryWithTests\ExampleTest
   ✓ it example 1
 
    PASS  Tests\Fixtures\ExampleTest
   ✓ it example 2
 
-  Tests:    2 passed (2 assertions)
+  Tests:    2 skipped, 2 passed (2 assertions)

tests/.snapshots/collision-parallel.txt

@@ -0,0 +1,23 @@
+
+  ⨯.
+  ────────────────────────────────────────────────────────────────────────────  
+   FAILED  Tests\Fixtures\CollisionTest > success                   Exception   
+  error
+
+  at tests/Fixtures/CollisionTest.php:4
+      1▕ <?php
+      2▕ 
+      3▕ test('error', function () {
+  ➜   4▕     throw new Exception('error');
+      5▕ })->skip(! isset($_SERVER['COLLISION_TEST']));
+      6▕ 
+      7▕ test('success', function () {
+      8▕     expect(true)->toBeTrue();
+      9▕ })->skip(! isset($_SERVER['COLLISION_TEST']));
+
+  1   tests/Fixtures/CollisionTest.php:4
+  2   src/Factories/TestCaseMethodFactory.php:100
+
+
+  Tests:    1 failed, 1 passed (1 assertions)
+  Duration: 0.16s

tests/.snapshots/collision.txt

@@ -0,0 +1,22 @@
+
+   FAIL  Tests\Fixtures\CollisionTest
+  ⨯ error
+  ✓ success
+  ────────────────────────────────────────────────────────────────────────────  
+   FAILED  Tests\Fixtures\CollisionTest > error                     Exception   
+  error
+
+  at tests/Fixtures/CollisionTest.php:4
+      1▕ <?php
+      2▕ 
+      3▕ test('error', function () {
+  ➜   4▕     throw new Exception('error');
+      5▕ })->skip(! isset($_SERVER['COLLISION_TEST']));
+      6▕ 
+      7▕ test('success', function () {
+      8▕     expect(true)->toBeTrue();
+      9▕ })->skip(! isset($_SERVER['COLLISION_TEST']));
+
+  1   tests/Fixtures/CollisionTest.php:4
+  2   src/Factories/TestCaseMethodFactory.php:100
+

tests/.snapshots/success.txt

@@ -779,6 +779,10 @@
   ! warning → Undefined property: P\Tests\Features\Warnings::$fooqwdfwqdfqw
   ! user warning → This is a warning description
 
+   WARN  Tests\Fixtures\CollisionTest
+  - error
+  - success
+
    PASS  Tests\Fixtures\DirectoryWithTests\ExampleTest
   ✓ it example 1
 
@@ -969,6 +973,10 @@
    PASS  Tests\Visual\BeforeEachTestName
   ✓ latest description
 
+   PASS  Tests\Visual\Collision
+  ✓ collision with ([''])
+  ✓ collision with (['--parallel'])
+
    PASS  Tests\Visual\Help
   ✓ visual snapshot of help command output
 
@@ -994,4 +1002,4 @@
    PASS  Tests\Visual\Version
   ✓ visual snapshot of help command output
 
-  Tests:    2 deprecated, 3 warnings, 4 incomplete, 1 notice, 4 todos, 12 skipped, 699 passed (1696 assertions)
+  Tests:    2 deprecated, 3 warnings, 4 incomplete, 1 notice, 4 todos, 14 skipped, 701 passed (1698 assertions)