Fixing issue where CakeTestCase would erase custom bootstrapped paths in tearDown().

Adding App::paths() to simplify getting all the paths App knows about.
Fixes #1934

lib/Cake/Core/App.php

@@ -227,6 +227,17 @@ class App {
 		return self::$_packages[$type];
 	}
 
+/**
+ * Get all the currently loaded paths from App. Useful for inspecting
+ * or storing all paths App knows about.  For a paths to a specific package
+ * use App::path()
+ *
+ * @return array An array of packages and their associated paths.
+ */
+	public static function paths() {
+		return self::$_packages;
+	}
+
 /**
  * Sets up each package location on the file system. You can configure multiple search paths
  * for each package, those will be used to look for files one folder at a time in the specified order

lib/Cake/Test/Case/Core/AppTest.php

@@ -749,4 +749,16 @@ class AppTest extends CakeTestCase {
 		App::uses('MyCustomClass', 'MyPackage/Name');
 		$this->assertEquals('MyPackage/Name', App::location('MyCustomClass'));
 	}
+
+/**
+ * Test that paths() works.
+ *
+ * @return void
+ */
+	public function testPaths() {
+		$result = App::paths();
+		$this->assertArrayHasKey('plugins', $result);
+		$this->assertArrayHasKey('Controller', $result);
+		$this->assertArrayHasKey('Controller/Component', $result);
+	}
 }

lib/Cake/Test/Case/TestSuite/CakeTestCaseTest.php

@@ -46,7 +46,7 @@ class CakeTestCaseTest extends CakeTestCase {
  * @return void
  */
 	public function setUp() {
-		$this->_debug = Configure::read('debug');
+		parent::setUp();
 		$this->Reporter = $this->getMock('CakeHtmlReporter');
 	}
 
@@ -56,7 +56,7 @@ class CakeTestCaseTest extends CakeTestCase {
  * @return void
  */
 	public function tearDown() {
-		Configure::write('debug', $this->_debug);
+		parent::tearDown();
 		unset($this->Result);
 		unset($this->Reporter);
 	}
@@ -230,4 +230,14 @@ class CakeTestCaseTest extends CakeTestCase {
 		$result = $test->run();
 		$this->assertEquals(0, $result->skippedCount());
 	}
+
+/**
+ * Test that CakeTestCase::setUp() backs up values.
+ *
+ * @return void
+ */
+	public function testSetupBackUpValues() {
+		$this->assertArrayHasKey('debug', $this->_configure);
+		$this->assertArrayHasKey('plugins', $this->_pathRestore);
+	}
 }

lib/Cake/TestSuite/CakeTestCase.php

@@ -58,6 +58,12 @@ abstract class CakeTestCase extends PHPUnit_Framework_TestCase {
  */
 	protected $_configure = array();
 
+/**
+ * Path settings to restore at the end of the test.
+ *
+ * @var array
+ */
+	protected $_pathRestore = array();
 
 /**
 * Runs the test case and collects the results in a TestResult object.
@@ -112,13 +118,21 @@ abstract class CakeTestCase extends PHPUnit_Framework_TestCase {
 	}
 
 /**
- * setup the test case, backup the static object values so they can be restored.
+ * Setup the test case, backup the static object values so they can be restored.
+ * Specifically backs up the contents of Configure and paths in App if they have
+ * not already been backed up.
  *
  * @return void
  */
 	public function setUp() {
 		parent::setUp();
-		$this->_configure = Configure::read();
+
+		if (empty($this->_configure)) {
+			$this->_configure = Configure::read();
+		}
+		if (empty($this->_pathRestore)) {
+			$this->_pathRestore = App::paths();
+		}
 		if (class_exists('Router', false)) {
 			Router::reload();
 		}
@@ -131,7 +145,7 @@ abstract class CakeTestCase extends PHPUnit_Framework_TestCase {
  */
 	public function tearDown() {
 		parent::tearDown();
-		App::build();
+		App::build($this->_pathRestore, App::RESET);
 		if (class_exists('ClassRegistry', false)) {
 			ClassRegistry::flush();
 		}