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// Copyright 2008 Google Inc.
//
// 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.google.codereview.manager.unpack;
import junit.framework.TestCase;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.util.Arrays;
public class RecordInputStreamTest extends TestCase {
public void testEmptyStream() throws IOException {
final RecordInputStream in = b("");
assertEquals(-1, in.read());
assertEquals(-1, in.read());
assertEquals(-1, in.read(new byte[8], 0, 8));
assertNull(in.readRecord('\n'));
in.close();
}
public void testReadOneByte() throws IOException {
final String exp = "abc";
final RecordInputStream in = b(exp);
assertEquals(exp.charAt(0), in.read());
assertEquals(exp.charAt(1), in.read());
assertEquals(exp.charAt(2), in.read());
assertEquals(-1, in.read());
in.close();
}
public void testReadBlockOffset0() throws IOException {
final String exp = "abc";
final RecordInputStream in = b(exp);
final byte[] act = new byte[exp.length()];
assertEquals(act.length, in.read(act, 0, act.length));
assertEquals(exp.charAt(0), act[0]);
assertEquals(exp.charAt(1), act[1]);
assertEquals(exp.charAt(2), act[2]);
assertEquals(-1, in.read(act, 0, act.length));
in.close();
}
public void testReadBlockOffset1() throws IOException {
final String exp = "abc";
final RecordInputStream in = b(exp);
assertEquals(exp.charAt(0), in.read());
final byte[] act = new byte[exp.length() - 1];
assertEquals(act.length, in.read(act, 0, act.length));
assertEquals(exp.charAt(1), act[0]);
assertEquals(exp.charAt(2), act[1]);
assertEquals(-1, in.read(act, 0, act.length));
in.close();
}
public void testReadRecord_SeparatorOnly() throws IOException {
final String rec1 = "foo";
final String rec2 = "bar";
final char sep = '\0';
final RecordInputStream in = b(rec1 + sep + rec2);
assertTrue(Arrays.equals(toBytes(rec1), in.readRecord(sep)));
assertTrue(Arrays.equals(toBytes(rec2), in.readRecord(sep)));
assertNull(in.readRecord(sep));
in.close();
}
public void testReadRecord_Terminated() throws IOException {
final String rec1 = "foo";
final String rec2 = "bar";
final char sep = '\0';
final RecordInputStream in = b(rec1 + sep + rec2 + sep);
assertTrue(Arrays.equals(toBytes(rec1), in.readRecord(sep)));
assertTrue(Arrays.equals(toBytes(rec2), in.readRecord(sep)));
assertNull(in.readRecord(sep));
in.close();
}
public void testReadRecord_EmptyRecords() throws IOException {
final char sep = '\0';
final RecordInputStream in = b("" + sep + "" + sep);
assertTrue(Arrays.equals(new byte[0], in.readRecord(sep)));
assertTrue(Arrays.equals(new byte[0], in.readRecord(sep)));
assertNull(in.readRecord(sep));
in.close();
}
public void testReadRecord_PartialRecordInBuffer() throws IOException {
final int huge = 16 * 1024;
final StringBuilder temp = new StringBuilder(huge);
for (int i = 0; i < huge; i++) {
temp.append('x');
}
final char sep = '\n';
final String ts = temp.toString();
final RecordInputStream in = b(ts + "1" + sep + ts + "2");
assertEquals(ts + "1", toString(in.readRecord(sep)));
assertEquals(ts + "2", toString(in.readRecord(sep)));
assertNull(in.readRecord(sep));
in.close();
}
private static RecordInputStream b(final String s) {
return new RecordInputStream(new ByteArrayInputStream(toBytes(s)));
}
private static byte[] toBytes(final String s) {
final String enc = "UTF-8";
try {
return s.getBytes(enc);
} catch (UnsupportedEncodingException uee) {
throw new RuntimeException("No " + enc + " support?", uee);
}
}
private static String toString(final byte[] b) {
final String enc = "UTF-8";
try {
return new String(b, 0, b.length, enc);
} catch (UnsupportedEncodingException uee) {
throw new RuntimeException("No " + enc + " support?", uee);
}
}
}
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