Added check and cleanup for storage/filecache

Some tests don't clean up the file cache and sometimes entries are
reused by mistake in subsequent test suites.

This cleans up the file cache and storage after every test suite and
also shows an annoying warning.

tests/testcleanuplistener.php

@@ -41,6 +41,12 @@ class TestCleanupListener implements PHPUnit_Framework_TestListener {
 	}
 
 	public function endTestSuite(PHPUnit_Framework_TestSuite $suite) {
+		if ($this->cleanStorages() && $this->isShowSuiteWarning()) {
+			printf("TestSuite '%s': Did not clean up storages\n", $suite->getName());
+		}
+		if ($this->cleanFileCache() && $this->isShowSuiteWarning()) {
+			printf("TestSuite '%s': Did not clean up file cache\n", $suite->getName());
+		}
 		if ($this->cleanStrayDataFiles() && $this->isShowSuiteWarning()) {
 			printf("TestSuite '%s': Did not clean up data dir\n", $suite->getName());
 		}
@@ -114,6 +120,26 @@ class TestCleanupListener implements PHPUnit_Framework_TestListener {
 		return false;
 	}
 
+	private function cleanStorages() {
+		$sql = 'DELETE FROM `*PREFIX*storages`';
+		$query = \OC_DB::prepare( $sql );
+		$result = $query->execute();
+		if ($result > 0) {
+			return true;
+		}
+		return false;
+	}
+
+	private function cleanFileCache() {
+		$sql = 'DELETE FROM `*PREFIX*filecache`';
+		$query = \OC_DB::prepare( $sql );
+		$result = $query->execute();
+		if ($result > 0) {
+			return true;
+		}
+		return false;
+	}
+
 	private function cleanStrayHooks() {
 		$hasHooks = false;
 		$hooks = OC_Hook::getHooks();