Issue 4181 - Fix FilterEngineTest tests

libadblockplus-android-tests/src/org/adblockplus/libadblockplus/FileSystemHelper.java

+/*
+ * This file is part of Adblock Plus <https://adblockplus.org/>,
+ * Copyright (C) 2006-2016 Eyeo GmbH
+ *
+ * Adblock Plus is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 3 as
+ * published by the Free Software Foundation.
+ *
+ * Adblock Plus is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Adblock Plus.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package org.adblockplus.libadblockplus;
+
+import android.util.Log;
+
+import java.io.File;
+import java.util.UUID;
+
+public class FileSystemHelper
+{
+    private static final String TAG = FileSystemHelper.class.getSimpleName();
+
+    // File.createTempFile() creates a file instead of just generating unique file name
+
+    public String generateUniqueFileName(String prefix, String suffix)
+    {
+        StringBuilder sb = new StringBuilder();
+        if (prefix != null)
+            sb.append(prefix);
+        sb.append(UUID.randomUUID());
+        if (suffix != null)
+            sb.append(suffix);
+        return sb.toString();
+    }
+
+    public File generateUniqueFileName(String prefix, String suffix, File parent)
+    {
+        return new File(parent, generateUniqueFileName(prefix, suffix));
+    }
+
+    public void delete(String filePath, boolean deleteSelf)
+    {
+        delete(new File(filePath), deleteSelf);
+    }
+
+    public void delete(File file, boolean deleteSelf)
+    {
+        if (file.isDirectory())
+            deleteDirectory(file, deleteSelf);
+        else
+            deleteFile(file);
+    }
+
+    public void deleteDirectory(File directory, boolean deleteSelf)
+    {
+        File files[] = directory.listFiles();
+        for (File eachFile : files)
+            delete(eachFile, true);
+
+        if (deleteSelf)
+        {
+            Log.w(TAG, "Deleting directory " + directory.getAbsolutePath());
+            directory.delete();
+        }
+    }
+
+    public void deleteFile(File file)
+    {
+        Log.w(TAG, "Deleting file " + file.getAbsolutePath());
+        file.delete();
+    }
+}