Port PHPUnit fixes to 9.x (#3117)

* Allow PHPUnit to bootstrap from core. (#3071)

* Use core's PHPUnit bootstrap file. (#3092)

* Remove support for PHPUnit 5. (#3102)

composer.json

@@ -31,7 +31,7 @@
         "grasmash/yaml-cli": "^1.0.0",
         "grasmash/yaml-expander": "^1.2.0",
         "oomphinc/composer-installers-extender": "^1.1",
-        "phpunit/phpunit": "^4.8|^5.7|^6.5",
+        "phpunit/phpunit": "^4.8|^6.5",
         "squizlabs/php_codesniffer": "^2.7",
         "symfony/console": "^3.4.0",
         "symfony/twig-bridge": "^3.3",

config/build.yml

@@ -122,6 +122,7 @@ phpcbf:
 # @todo Move to subkey of tests.
 phpunit:
   - path: '${repo.root}/tests/phpunit'
+    config: '${docroot}/core/phpunit.xml.dist'
   # Customization for one or more custom phpunit test locations
   # and if the core (or custom) config file should be included as a -c parameter.
   # - path: '${docroot}/modules/custom/<your_module>'

src/Robo/Commands/Tests/PhpUnitCommand.php

@@ -18,12 +18,6 @@ class PhpUnitCommand extends BltTasks {
    * @var string*/
   protected $reportsDir;
 
-  /**
-   * The bootstrap filename.
-   *
-   * @var string*/
-  protected $bootstrapFile;
-
   /**
    * The filename for PHPUnit report.
    *
@@ -47,7 +41,6 @@ public function initialize() {
     $this->reportFile = $this->reportsDir . '/results.xml';
     $this->testsDir = $this->getConfigValue('repo.root') . '/tests/phpunit';
     $this->phpunitConfig = $this->getConfigValue('phpunit');
-    $this->bootstrapFile = $this->getConfigValue('blt.root') . '/scripts/phpunit/bootstrap.php';
   }
 
   /**
@@ -60,7 +53,6 @@ public function testsPhpUnit() {
     $this->createLogs();
     foreach ($this->phpunitConfig as $test) {
       $task = $this->taskPHPUnit()
-        ->bootstrap($this->bootstrapFile)
         ->xml($this->reportFile)
         ->printOutput(TRUE)
         ->printMetadata(FALSE);

tests/phpunit/bootstrap.php

@@ -4,9 +4,6 @@
  * @file
  */
 
-// Alias PHPUnit classes for backwards compatibility.
-include '../../scripts/phpunit/bootstrap.php';
-
 use Acquia\Blt\Tests\SandboxManager;
 
 $sandbox_manager = new SandboxManager();