Added regression test for sebastianbergmann#1351.

tests/Regression/GitHub/1351.phpt

@@ -0,0 +1,38 @@
+--TEST--
+GH-1351: Test result does not serialize test class in process isolation
+--FILE--
+<?php
+
+$_SERVER['argv'][1] = '--no-configuration';
+$_SERVER['argv'][2] = '--process-isolation';
+$_SERVER['argv'][3] = 'Issue1351Test';
+$_SERVER['argv'][4] = __DIR__ . '/1351/Issue1351Test.php';
+
+require __DIR__ . '/../../bootstrap.php';
+PHPUnit_TextUI_Command::main();
+?>
+--EXPECTF--
+PHPUnit %s by Sebastian Bergmann.
+
+F.E.
+
+Time: %s, Memory: %sMb
+
+There was 1 error:
+
+1) Issue1351Test::testExceptionPre
+RuntimeException: Expected rethrown exception.
+%A
+Caused by
+LogicException: Expected exception.
+%A
+
+--
+
+There was 1 failure:
+
+1) Issue1351Test::testFailurePre
+Expected failure.
+%A
+FAILURES!
+Tests: 4, Assertions: 5, Failures: 1, Errors: 1.

tests/Regression/GitHub/1351/ChildProcessClass1351.php

@@ -0,0 +1,4 @@
+<?php
+class ChildProcessClass1351
+{
+}

tests/Regression/GitHub/1351/Issue1351Test.php

@@ -0,0 +1,39 @@
+<?php
+class Issue1351Test extends PHPUnit_Framework_TestCase
+{
+    protected $instance;
+
+    /**
+     * @runInSeparateProcess
+     */
+    public function testFailurePre()
+    {
+        $this->instance = new ChildProcessClass1351();
+        $this->assertFalse(TRUE, 'Expected failure.');
+    }
+
+    public function testFailurePost()
+    {
+        $this->assertNull($this->instance);
+        $this->assertFalse(class_exists('ChildProcessClass1351', false), 'ChildProcessClass1351 is not loaded.');
+    }
+
+    /**
+     * @runInSeparateProcess
+     */
+    public function testExceptionPre()
+    {
+        $this->instance = new ChildProcessClass1351();
+        try {
+            throw new LogicException('Expected exception.');
+        } catch (LogicException $e) {
+            throw new RuntimeException('Expected rethrown exception.', 0, $e);
+        }
+    }
+
+    public function testExceptionPost()
+    {
+        $this->assertNull($this->instance);
+        $this->assertFalse(class_exists('ChildProcessClass1351', false), 'ChildProcessClass1351 is not loaded.');
+    }
+}