StringReaderTest.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.tests.java.io;

import java.io.IOException;
import java.io.StringReader;

public class StringReaderTest extends junit.framework.TestCase {

    String testString = "This is a test string";

    StringReader sr;

    /**
     * java.io.StringReader#StringReader(java.lang.String)
     */
    public void test_ConstructorLjava_lang_String() {
        // Test for method java.io.StringReader(java.lang.String)
        assertTrue("Used in tests", true);
    }

    /**
     * java.io.StringReader#close()
     */
    public void test_close() throws Exception {
        // Test for method void java.io.StringReader.close()
        try {
            sr = new StringReader(testString);
            sr.close();
            char[] buf = new char[10];
            sr.read(buf, 0, 2);
            fail("Close failed");
        } catch (java.io.IOException e) {
            return;
        }
    }

    /**
     * java.io.StringReader#mark(int)
     */
    public void test_markI() throws Exception {
        // Test for method void java.io.StringReader.mark(int)
        sr = new StringReader(testString);
        sr.skip(5);
        sr.mark(0);
        sr.skip(5);
        sr.reset();
        char[] buf = new char[10];
        sr.read(buf, 0, 2);
        assertTrue("Failed to return to mark", new String(buf, 0, 2)
                .equals(testString.substring(5, 7)));
    }

    /**
     * java.io.StringReader#markSupported()
     */
    public void test_markSupported() {
        // Test for method boolean java.io.StringReader.markSupported()

        sr = new StringReader(testString);
        assertTrue("markSupported returned false", sr.markSupported());
    }

    /**
     * java.io.StringReader#read()
     */
    public void test_read() throws Exception {
        // Test for method int java.io.StringReader.read()
        sr = new StringReader(testString);
        int r = sr.read();
        assertEquals("Failed to read char", 'T', r);
        sr = new StringReader(new String(new char[] { '\u8765' }));
        assertTrue("Wrong double byte char", sr.read() == '\u8765');
    }

    /**
     * java.io.StringReader#read(char[], int, int)
     */
    public void test_read$CII() throws Exception {
        // Test for method int java.io.StringReader.read(char [], int, int)
        sr = new StringReader(testString);
        char[] buf = new char[testString.length()];
        int r = sr.read(buf, 0, testString.length());
        assertTrue("Failed to read chars", r == testString.length());
        assertTrue("Read chars incorrectly", new String(buf, 0, r)
                .equals(testString));
    }

    /**
     * java.io.StringReader#ready()
     */
    public void test_ready() throws Exception {
        // Test for method boolean java.io.StringReader.ready()
        sr = new StringReader(testString);
        assertTrue("Steam not ready", sr.ready());
        sr.close();
        int r = 0;
        try {
            sr.ready();
        } catch (IOException e) {
            r = 1;
        }
        assertEquals("Expected IOException not thrown in read()", 1, r);
    }

    /**
     * java.io.StringReader#reset()
     */
    public void test_reset() throws Exception {
        // Test for method void java.io.StringReader.reset()
        sr = new StringReader(testString);
        sr.skip(5);
        sr.mark(0);
        sr.skip(5);
        sr.reset();
        char[] buf = new char[10];
        sr.read(buf, 0, 2);
        assertTrue("Failed to reset properly", new String(buf, 0, 2)
                .equals(testString.substring(5, 7)));
    }

    /**
     * java.io.StringReader#skip(long)
     */
    public void test_skipJ() throws Exception {
        // Test for method long java.io.StringReader.skip(long)
        sr = new StringReader(testString);
        sr.skip(5);
        char[] buf = new char[10];
        sr.read(buf, 0, 2);
        assertTrue("Failed to skip properly", new String(buf, 0, 2)
                .equals(testString.substring(5, 7)));
    }

    // Regression test for HARMONY-5077
    static boolean finish = false;

    public void test_synchronization() {
        String anything = "Hello world";
        final StringReader sr = new StringReader(anything);
        Thread other = new Thread(new Runnable() {
            public void run() {
                sr.close();
                finish = true;
            }

            ;
        });

        synchronized (anything) {
            other.start();
            while (!finish) {
                Thread.yield();
            }
        }
    }
}