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/*
* 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);
}
}
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