libcore/luni/src/test/java/tests/api/java/io/FilterReaderTest.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 tests.api.java.io;

import java.io.ByteArrayInputStream;
import java.io.FilterReader;
import java.io.IOException;
import java.io.InputStreamReader;

import dalvik.annotation.TestLevel;
import dalvik.annotation.TestTargetClass;
import dalvik.annotation.TestTargetNew;

@TestTargetClass(FilterReader.class) 
public class FilterReaderTest extends junit.framework.TestCase {

    private boolean called;
    private FilterReader fr;
   
    static class MyFilterReader extends java.io.FilterReader {
        public MyFilterReader(java.io.Reader reader) {
            super(reader);
        }
    }

    class MockReader extends java.io.Reader {
        public MockReader() {
        }
        
        public void close() throws IOException {
            called = true;
        }
        
        public void mark(int readLimit) throws IOException {
            called = true;
        }
        
        public boolean markSupported() {
            called = true;
            return false;
        }
        
        public int read() throws IOException {
            called = true;
            return 0;
        }
        
        public int read(char[] buffer, int offset, int count) throws IOException {
            called = true;
            return 0;
        }

        public boolean ready() throws IOException {
            called = true;
            return true;
        }
        
        public void reset() throws IOException {
            called = true;
        }
        
        public long skip(long count) throws IOException {
            called = true;
            return 0;
        }
    }
    
    /**
     * @tests java.io.FilterReader#FilterReader(java.io.Reader)
     */
    @TestTargetNew(
        level = TestLevel.COMPLETE,
        notes = "Verifies constructor FilterReader(java.io.Reader).",
        method = "FilterReader",
        args = {java.io.Reader.class}
    )     
    public void test_ConstructorLjava_io_Reader() {
        
        FilterReader myReader = null;

        called = true;
        
        try {
            myReader = new MyFilterReader(null);
            fail("NullPointerException expected.");
        } catch (NullPointerException e) {
            // expected
        }
    }
    
    /**
     * @tests java.io.FilterReader#close()
     */
    @TestTargetNew(
        level = TestLevel.COMPLETE,
        notes = "Verifies close().",
        method = "close",
        args = {}
    )     
    public void test_close() throws IOException {
        fr.close();
        assertTrue("close() has not been called.", called);
    }
    
    /**
     * @tests java.io.FilterReader#mark(int)
     */
    @TestTargetNew(
        level = TestLevel.COMPLETE,
        notes = "Verifies mark(int).",
        method = "mark",
        args = {int.class}
    )     
    public void test_markI() throws IOException {
        fr.mark(0);
        assertTrue("mark(int) has not been called.", called);
    }
    
    /**
     * @tests java.io.FilterReader#markSupported()
     */
    @TestTargetNew(
        level = TestLevel.COMPLETE,
        notes = "Verifies markSupported().",
        method = "markSupported",
        args = {}
    )     
    public void test_markSupported() {
        fr.markSupported();
        assertTrue("markSupported() has not been called.", called);
    }
    
    /**
     * @tests java.io.FilterReader#read()
     */
    @TestTargetNew(
        level = TestLevel.COMPLETE,
        notes = "Verifies read().",
        method = "read",
        args = {}
    )     
    public void test_read() throws IOException {
        fr.read();
        assertTrue("read() has not been called.", called);
    }
    
    /**
     * @tests java.io.FilterReader#read(char[], int, int)
     */
    @TestTargetNew(
        level = TestLevel.PARTIAL_COMPLETE,
        notes = "Verifies read(char[], int, int).",
        method = "read",
        args = {char[].class, int.class, int.class}
    )     
    public void test_read$CII() throws IOException {
        char[] buffer = new char[5];
        fr.read(buffer, 0, 5);
        assertTrue("read(char[], int, int) has not been called.", called);
    }
    
    /**
     * @tests java.io.FilterReader#read(char[], int, int)
     */
    @TestTargetNew(
        level = TestLevel.PARTIAL_COMPLETE,
        notes = "Verifies read(char[], int, int).",
        method = "read",
        args = {char[].class, int.class, int.class}
    )     
    public void test_read$CII_Exception() throws IOException {
        byte[] bbuffer = new byte[20];
        char[] buffer = new char[10];
        
        fr = new MyFilterReader(new InputStreamReader(
            new ByteArrayInputStream(bbuffer)));

        try {
            fr.read(buffer, 0, -1);
            fail("Test 1: IndexOutOfBoundsException expected.");
        } catch (IndexOutOfBoundsException e) {
            // Expected.
        }

        try {
            fr.read(buffer, -1, 1);
            fail("Test 2: IndexOutOfBoundsException expected.");
        } catch (IndexOutOfBoundsException e) {
            // Expected.
        }

        try {
            fr.read(buffer, 10, 1);
            fail("Test 3: IndexOutOfBoundsException expected.");
        } catch (IndexOutOfBoundsException e) {
            // Expected.
        }
    }
    
    /**
     * @tests java.io.FilterReader#ready()
     */
    @TestTargetNew(
        level = TestLevel.COMPLETE,
        notes = "Verifies ready().",
        method = "ready",
        args = {}
    )     
    public void test_ready() throws IOException {
        fr.ready();
        assertTrue("ready() has not been called.", called);
    }
    
    /**
     * @tests java.io.FilterReader#reset()
     */
    @TestTargetNew(
        level = TestLevel.COMPLETE,
        notes = "Verifies reset().",
        method = "reset",
        args = {}
    )     
    public void test_reset() throws IOException {
        fr.reset();
        assertTrue("reset() has not been called.", called);
    }
    
    /**
     * @tests java.io.FilterReader#skip()
     */
    @TestTargetNew(
        level = TestLevel.COMPLETE,
        notes = "Verifies skip(long).",
        method = "skip",
        args = {long.class}
    )     
    public void test_skip() throws IOException {
        fr.skip(10);
        assertTrue("skip(long) has not been called.", called);
    }
    
    /**
     * This method is called before a test is executed. It creates a
     * FilterReader instance.
     */
    protected void setUp() {

        fr = new MyFilterReader(new MockReader());
        called = false;
    }

    /**
     * This method is called after a test is executed. It closes the
     * FilterReader instance.
     */
    protected void tearDown() {

        try {
            fr.close();
        } catch (Exception e) {
            System.out.println("Exception during FilterReaderTest tear down.");
        }
    }
}