android-platform-libcore/luni/src/test/java/org/apache/harmony/luni/tests/java/io/PushBackInputStreamTest.java

/* Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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 org.apache.harmony.luni.tests.java.io;

import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.PushbackInputStream;

import junit.framework.TestCase;
import dalvik.annotation.TestLevel;
import dalvik.annotation.TestTargetClass;
import dalvik.annotation.TestTargetNew;
@TestTargetClass(PushbackInputStream.class)
public class PushBackInputStreamTest extends TestCase {

    /*
     * @tests java.io.PushBackInputStream(InputStream)
     */
    @TestTargetNew(
        level = TestLevel.PARTIAL_COMPLETE,
        notes = "Checks IOException.",
        method = "read",
        args = {}
    )
    public void test_read() {
        PushbackInputStream str = new PushbackInputStream(null);
        try {
            str.read();
            fail("Test 1: IOException expected.");
        } catch (IOException e) {
            // Expected.
        }

        str = new PushbackInputStream(null, 1);
        try {
            str.read();
            fail("Test 2: IOException expected.");
        } catch (IOException e) {
            // Expected
        }
    }

    /**
     * @tests java.io.PushbackInputStream#unread(byte[], int, int)
     */
    @TestTargetNew(
        level = TestLevel.PARTIAL_COMPLETE,
        notes = "",
        method = "unread",
        args = {byte[].class, int.class, int.class}
    )
    public void test_unread$BII() {
        // Regression for HARMONY-49
        try {
            PushbackInputStream pb = new PushbackInputStream(
                    new ByteArrayInputStream(new byte[] { 0 }), 2);
            pb.unread(new byte[1], 0, 5);
            fail("Assert 0: should throw IOE");
        } catch (IOException e) {
            // expected
        }
    }
    @TestTargetNew(
        level = TestLevel.COMPLETE,
        notes = "",
        method = "reset",
        args = {}
    )
    public void test_reset() {
        PushbackInputStream pb = new PushbackInputStream(
                new ByteArrayInputStream(new byte[] { 0 }), 2);
        try {
            pb.reset();
            fail("Should throw IOException");
        } catch (IOException e) {
            // expected
        }
    }
    @TestTargetNew(
        level = TestLevel.COMPLETE,
        notes = "",
        method = "mark",
        args = {int.class}
    )
    public void test_mark() {
        PushbackInputStream pb = new PushbackInputStream(
                new ByteArrayInputStream(new byte[] { 0 }), 2);
        pb.mark(Integer.MAX_VALUE);
        pb.mark(0);
        pb.mark(-1);
        pb.mark(Integer.MIN_VALUE);
    }

}