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ConsumingInputStreamTest.java
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/
ConsumingInputStreamTest.java
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/*
* Copyright 2019 Google LLC
*
* 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
*
* https://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.google.api.client.http;
import static org.junit.Assert.assertEquals;
import java.io.IOException;
import java.io.InputStream;
import java.nio.charset.Charset;
import java.nio.charset.StandardCharsets;
import org.junit.Test;
public class ConsumingInputStreamTest {
@Test
public void testClose_drainsBytesOnClose() throws IOException {
MockInputStream mockInputStream = new MockInputStream("abc123".getBytes(StandardCharsets.UTF_8));
InputStream consumingInputStream = new ConsumingInputStream(mockInputStream);
assertEquals(6, mockInputStream.getBytesToRead());
// read one byte
consumingInputStream.read();
assertEquals(5, mockInputStream.getBytesToRead());
// closing the stream should read the remaining bytes
consumingInputStream.close();
assertEquals(0, mockInputStream.getBytesToRead());
}
private class MockInputStream extends InputStream {
private int bytesToRead;
MockInputStream(byte[] data) {
this.bytesToRead = data.length;
}
@Override
public int read() throws IOException {
if (bytesToRead == 0) {
return -1;
}
bytesToRead--;
return 1;
}
int getBytesToRead() {
return bytesToRead;
}
}
}