| /* |
| * Copyright (C) 2010 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package com.android.server; |
| |
| import android.content.Context; |
| import android.os.FileUtils; |
| import android.test.AndroidTestCase; |
| |
| import java.io.File; |
| |
| /** |
| * Tests for {@link com.android.server.EntropyMixer} |
| */ |
| public class EntropyMixerTest extends AndroidTestCase { |
| |
| public void testInitialWrite() throws Exception { |
| File dir = getContext().getDir("testInitialWrite", Context.MODE_PRIVATE); |
| File file = File.createTempFile("testInitialWrite", "dat", dir); |
| file.deleteOnExit(); |
| assertEquals(0, FileUtils.readTextFile(file, 0, null).length()); |
| |
| // The constructor has the side effect of writing to file |
| new EntropyMixer("/dev/null", file.getCanonicalPath()); |
| |
| assertTrue(FileUtils.readTextFile(file, 0, null).length() > 0); |
| } |
| } |