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/*
* Copyright (C) 2013 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.loganalysis.util;
import junit.framework.TestCase;
/**
* Unit tests for {@link LogTailUtil}.
*/
public class LogTailUtilTest extends TestCase {
/**
* Test that last and id tails of the log are returned correctly.
*/
public void testGetPreambles() {
LogTailUtil preambleUtil = new LogTailUtil(500, 3, 3);
assertEquals("", preambleUtil.getLastTail());
assertEquals("", preambleUtil.getIdTail(1));
preambleUtil.addLine(1, "line 1");
preambleUtil.addLine(2, "line 2");
assertEquals("line 1\nline 2", preambleUtil.getLastTail());
assertEquals("line 1", preambleUtil.getIdTail(1));
preambleUtil.addLine(1, "line 3");
preambleUtil.addLine(2, "line 4");
preambleUtil.addLine(1, "line 5");
preambleUtil.addLine(2, "line 6");
preambleUtil.addLine(1, "line 7");
preambleUtil.addLine(2, "line 8");
assertEquals("line 6\nline 7\nline 8", preambleUtil.getLastTail());
assertEquals("line 3\nline 5\nline 7", preambleUtil.getIdTail(1));
}
/**
* Test that the ring buffer is limited to a certain size.
*/
public void testRingBufferSize() {
LogTailUtil preambleUtil = new LogTailUtil(5, 3, 3);
preambleUtil.addLine(1, "line 1");
preambleUtil.addLine(2, "line 2");
preambleUtil.addLine(2, "line 3");
preambleUtil.addLine(2, "line 4");
preambleUtil.addLine(2, "line 5");
preambleUtil.addLine(2, "line 6");
// The first line should roll off the end of the buffer.
assertEquals("", preambleUtil.getIdTail(1));
}
}
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