Issue 4181 - Fix FilterEngineTest tests

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

Index: libadblockplus-android-tests/src/org/adblockplus/libadblockplus/tests/BaseJsTest.java
diff --git a/libadblockplus-android-tests/src/org/adblockplus/libadblockplus/tests/BaseJsTest.java b/libadblockplus-android-tests/src/org/adblockplus/libadblockplus/tests/BaseJsTest.java
index 85e983996ce91431cebf2ce8ab78270c298c485a..4b26b442d4f36b6144fd16564adf8cb9def566c3 100644
--- a/libadblockplus-android-tests/src/org/adblockplus/libadblockplus/tests/BaseJsTest.java
+++ b/libadblockplus-android-tests/src/org/adblockplus/libadblockplus/tests/BaseJsTest.java
@@ -18,24 +18,57 @@
 package org.adblockplus.libadblockplus.tests;
 
 import org.adblockplus.libadblockplus.AppInfo;
+import org.adblockplus.libadblockplus.FileSystemUtils;
 import org.adblockplus.libadblockplus.JsEngine;
-import org.adblockplus.libadblockplus.LazyLogSystem;
 import org.adblockplus.libadblockplus.ThrowingWebRequest;
 
 import android.test.AndroidTestCase;
 
+import java.io.File;
+import java.io.IOException;
+
 public abstract class BaseJsTest extends AndroidTestCase
 {
-    protected JsEngine jsEngine;
+  protected JsEngine jsEngine;
+  protected File tmpFileSystemPath;
+  protected FileSystemUtils fileSystemUtils = new FileSystemUtils();
 
-    @Override
-    protected void setUp() throws Exception
-    {
-        super.setUp();
+  protected File buildTmpFileSystemPath() throws IOException
+  {
+    File tmpFileSystemPath = fileSystemUtils
+      .generateUniqueFileName(null, ".fs", getContext().getCacheDir());
+    tmpFileSystemPath.mkdirs();
+    return tmpFileSystemPath;
+  }
+
+  @Override
+  protected void setUp() throws Exception
+  {
+    super.setUp();
+
+    jsEngine = new JsEngine(AppInfo.builder().build());
+    jsEngine.setDefaultLogSystem();
 
-        jsEngine = new JsEngine(AppInfo.builder().build());
-        jsEngine.setDefaultLogSystem();
-        jsEngine.setDefaultFileSystem(getContext().getFilesDir().getAbsolutePath());
-        jsEngine.setWebRequest(new ThrowingWebRequest());
+    // we need to generate new file system path in order
+    // not to have JsEngine state from the previous test
+    tmpFileSystemPath = buildTmpFileSystemPath();
+    jsEngine.setDefaultFileSystem(tmpFileSystemPath.getAbsolutePath());
+    jsEngine.setWebRequest(new ThrowingWebRequest());
+  }
+
+  protected void cleanupFileSystem()
+  {
+    if (tmpFileSystemPath != null && tmpFileSystemPath.exists())
+    {
+      fileSystemUtils.delete(tmpFileSystemPath, true);
+      tmpFileSystemPath = null;
     }
+  }
+
+  @Override
+  protected void tearDown() throws Exception
+  {
+    cleanupFileSystem();
+    super.tearDown();
+  }
 }