libcore/luni/src/test/java/org/apache/harmony/luni/tests/java/io/OutputStreamWriterTest.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 dalvik.annotation.TestTargets;
import dalvik.annotation.TestLevel;
import dalvik.annotation.TestTargetNew;
import dalvik.annotation.TestTargetClass;

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.OutputStreamWriter;
import java.io.UnsupportedEncodingException;

import junit.framework.TestCase;
@TestTargetClass(OutputStreamWriter.class)
public class OutputStreamWriterTest extends TestCase {
    
    @TestTargets({
        @TestTargetNew(
            level = TestLevel.PARTIAL_COMPLETE,
            notes = "Checks IOException",
            method = "getEncoding",
            args = {}
        ),
        @TestTargetNew(
            level = TestLevel.PARTIAL_COMPLETE,
            notes = "Checks IOException",
            method = "close",
            args = {}
        )
    })
    public void testGetEncoding_StreamClosed() {
        OutputStreamWriter out = null;
        try {
            out = new OutputStreamWriter(new ByteArrayOutputStream(),
                    "UTF-16BE");
        } catch (UnsupportedEncodingException e) {
            fail("Should not throw UnsupportedEncodingException");
        }
        try {
            out.close();
        } catch (IOException e) {
            fail("Should not throw IOException");
        }
        String result = out.getEncoding();
        assertNull(result);
    }

    @TestTargetNew(
        level = TestLevel.PARTIAL_COMPLETE,
        notes = "",
        method = "getEncoding",
        args = {}
    )
    public void testGetEncoding_NotHistorical() {
        OutputStreamWriter out = null;
        try {
            out = new OutputStreamWriter(new ByteArrayOutputStream(),
                    "UTF-16BE");
        } catch (UnsupportedEncodingException e) {
            // ok
        }
        String result = out.getEncoding();
        assertEquals("UnicodeBigUnmarked", result);
    }
}