Update to drupal 8.0.0-rc1. For more information, see https://www.drupal.org/node/2582663

core/modules/simpletest/tests/fixtures/simpletest_phpunit_run_command_test.php

@@ -0,0 +1,22 @@
+<?php
+
+namespace Drupal\Tests\simpletest\Unit;
+
+use Drupal\Tests\UnitTestCase;
+
+/**
+ * This test crashes PHP.
+ *
+ * To avoid accidentally running, it is not in a normal PSR-4 directory, the
+ * file name does not adhere to PSR-4 and an environment variable also needs to
+ * be set for the crash to happen.
+ */
+class SimpletestPhpunitRunCommandTestWillDie extends UnitTestCase {
+
+  public function testWillDie() {
+    if (getenv('SimpletestPhpunitRunCommandTestWillDie') === 'fail') {
+      exit(1);
+    }
+  }
+}
+

core/modules/simpletest/tests/src/Functional/BrowserTestBaseTest.php

@@ -34,7 +34,7 @@ class BrowserTestBaseTest extends BrowserTestBase {
     $this->drupalLogin($account);
 
     // Visit a Drupal page that requires login.
-    $this->drupalGet('/test-page');
+    $this->drupalGet('test-page');
     $this->assertSession()->statusCodeEquals(200);
 
     // Test page contains some text.
@@ -46,7 +46,7 @@ class BrowserTestBaseTest extends BrowserTestBase {
    */
   public function testForm() {
     // Ensure the proper response code for a _form route.
-    $this->drupalGet('/form-test/object-builder');
+    $this->drupalGet('form-test/object-builder');
     $this->assertSession()->statusCodeEquals(200);
 
     // Ensure the form and text field exist.

core/modules/simpletest/tests/src/Unit/AssertHelperTraitTest.php

@@ -0,0 +1,47 @@
+<?php
+
+/**
+ * @file
+ * Contains \Drupal\Tests\simpletest\Unit\AssertHelperTraitTest.
+ */
+
+namespace Drupal\Tests\simpletest\Unit;
+
+use Drupal\Core\Render\Markup;
+use Drupal\simpletest\AssertHelperTrait;
+use Drupal\Tests\UnitTestCase;
+
+/**
+ * @coversDefaultClass \Drupal\simpletest\AssertHelperTrait
+ * @group simpletest
+ */
+class AssertHelperTraitTest extends UnitTestCase {
+
+  /**
+   * @covers ::castSafeStrings
+   * @dataProvider providerCastSafeStrings
+   */
+  public function testCastSafeStrings($expected, $value) {
+    $class = new AssertHelperTestClass();
+    $this->assertSame($expected, $class->testMethod($value));
+  }
+
+  public function providerCastSafeStrings() {
+    $safe_string = Markup::create('test safe string');
+    return [
+      ['test simple string', 'test simple string'],
+      [['test simple array', 'test simple array'], ['test simple array', 'test simple array']],
+      ['test safe string', $safe_string],
+      [['test safe string', 'test safe string'], [$safe_string, $safe_string]],
+      [['test safe string', 'mixed array', 'test safe string'], [$safe_string, 'mixed array', $safe_string]],
+    ];
+  }
+}
+
+class AssertHelperTestClass {
+  use AssertHelperTrait;
+
+  public function testMethod($value) {
+    return $this->castSafeStrings($value);
+  }
+}

core/modules/simpletest/tests/src/Unit/SimpletestPhpunitRunCommandTest.php

@@ -0,0 +1,42 @@
+<?php
+
+/**
+ * @file
+ * Contains \Drupal\Tests\simpletest\Unit\SimpletestPhpunitRunCommandTest.
+ */
+
+namespace Drupal\Tests\simpletest\Unit;
+
+use Drupal\Core\DependencyInjection\ContainerBuilder;
+use Drupal\Tests\UnitTestCase;
+
+/**
+ * Tests simpletest_run_phpunit_tests() handles PHPunit fatals correctly.
+ *
+ * @group simpletest
+ *
+ * @runTestsInSeparateProcesses
+ * @preserveGlobalState disabled
+ */
+class SimpletestPhpunitRunCommandTest extends UnitTestCase {
+
+  function testSimpletestPhpUnitRunCommand() {
+    include_once __DIR__ .'/../../fixtures/simpletest_phpunit_run_command_test.php';
+    $app_root = __DIR__ . '/../../../../../..';
+    include_once "$app_root/core/modules/simpletest/simpletest.module";
+    $container = new ContainerBuilder;
+    $container->set('app.root', $app_root);
+    $file_system = $this->prophesize('Drupal\Core\File\FileSystemInterface');
+    $file_system->realpath('public://simpletest')->willReturn(sys_get_temp_dir());
+    $container->set('file_system', $file_system->reveal());
+    \Drupal::setContainer($container);
+    $test_id = basename(tempnam(sys_get_temp_dir(), 'xxx'));
+    foreach (['pass', 'fail'] as $status) {
+      putenv('SimpletestPhpunitRunCommandTestWillDie=' . $status);
+      $ret = simpletest_run_phpunit_tests($test_id, ['Drupal\Tests\simpletest\Unit\SimpletestPhpunitRunCommandTestWillDie']);
+      $this->assertSame($ret[0]['status'], $status);
+    }
+    unlink(simpletest_phpunit_xml_filepath($test_id));
+  }
+
+}