66 lines
1.9 KiB
Java
66 lines
1.9 KiB
Java
/*
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* Copyright (C) 2007 The Guava Authors
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.google.common.io;
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import java.io.ByteArrayOutputStream;
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/**
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* Unit tests for {@link CountingOutputStream}.
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*
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* @author Chris Nokleberg
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*/
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public class CountingOutputStreamTest extends IoTestCase {
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public void testCount() throws Exception {
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int written = 0;
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ByteArrayOutputStream out = new ByteArrayOutputStream();
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CountingOutputStream counter = new CountingOutputStream(out);
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assertEquals(written, out.size());
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assertEquals(written, counter.getCount());
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counter.write(0);
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written += 1;
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assertEquals(written, out.size());
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assertEquals(written, counter.getCount());
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byte[] data = new byte[10];
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counter.write(data);
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written += 10;
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assertEquals(written, out.size());
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assertEquals(written, counter.getCount());
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counter.write(data, 0, 5);
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written += 5;
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assertEquals(written, out.size());
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assertEquals(written, counter.getCount());
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counter.write(data, 2, 5);
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written += 5;
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assertEquals(written, out.size());
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assertEquals(written, counter.getCount());
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// Test that illegal arguments do not affect count
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try {
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counter.write(data, 0, data.length + 1);
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fail("expected exception");
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} catch (IndexOutOfBoundsException expected) {
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}
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assertEquals(written, out.size());
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assertEquals(written, counter.getCount());
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}
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}
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