xref: /libcore/luni/src/test/java/libcore/java/util/zip/DeflaterInputStreamTest.java

/*
 * 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 libcore.java.util.zip;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.Arrays;
import java.util.zip.DeflaterInputStream;
import java.util.zip.InflaterInputStream;
import libcore.junit.junit3.TestCaseWithRules;
import libcore.junit.util.ResourceLeakageDetector;
import org.junit.Rule;
import org.junit.rules.TestRule;

public final class DeflaterInputStreamTest extends TestCaseWithRules {
    @Rule
    public TestRule guardRule = ResourceLeakageDetector.getRule();

    public void testReadByteByByte() throws IOException {
        byte[] data = { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 };
        InputStream in = new DeflaterInputStream(new ByteArrayInputStream(data));
        ByteArrayOutputStream out = new ByteArrayOutputStream();

        assertEquals(1, in.available());
        int b;
        while ((b = in.read()) != -1) {
            out.write(b);
        }
        assertEquals(0, in.available());

        assertEquals(Arrays.toString(data), Arrays.toString(inflate(out.toByteArray())));

        in.close();
        try {
            in.available();
            fail();
        } catch (IOException expected) {
        }
    }

    public byte[] inflate(byte[] bytes) throws IOException {
        try (InputStream in = new InflaterInputStream(new ByteArrayInputStream(bytes))) {
            ByteArrayOutputStream out = new ByteArrayOutputStream();
            byte[] buffer = new byte[1024];
            int count;
            while ((count = in.read(buffer)) != -1) {
                out.write(buffer, 0, count);
            }
            return out.toByteArray();
        }
    }

    public void testReadWithBuffer() throws IOException {
        byte[] data = { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 };
        byte[] buffer = new byte[8];
        InputStream in = new DeflaterInputStream(new ByteArrayInputStream(data));
        ByteArrayOutputStream out = new ByteArrayOutputStream();
        assertEquals(1, in.available());
        int count;
        while ((count = in.read(buffer, 0, 5)) != -1) {
            assertTrue(count <= 5);
            out.write(buffer, 0, count);
        }
        assertEquals(0, in.available());

        assertEquals(Arrays.toString(data), Arrays.toString(inflate(out.toByteArray())));

        in.close();
        try {
            in.available();
            fail();
        } catch (IOException expected) {
        }
    }

    public void testReadExceptions() throws IOException {
        byte[] data = { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 };
        byte[] buffer = new byte[8];
        InputStream in = new DeflaterInputStream(new ByteArrayInputStream(data));
        try {
            in.read(buffer, 0, 10);
            fail();
        } catch (IndexOutOfBoundsException expected) {
        }
        try {
            in.read(null, 0, 5);
            fail();
        } catch (NullPointerException expected) {
        }
        try {
            in.read(buffer, -1, 5);
            fail();
        } catch (IndexOutOfBoundsException expected) {
        }
        in.close();
        try {
            in.read(buffer, 0, 5);
            fail();
        } catch (IOException expected) {
        }
    }
}