sdk/sources/android-23/org/apache/harmony/tests/java/nio/charset/UTF16CharsetEncoderTest.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.nio.charset;

import java.nio.ByteBuffer;
import java.nio.CharBuffer;
import java.nio.charset.CharacterCodingException;
import java.nio.charset.Charset;
import java.nio.charset.CharsetDecoder;

/**
 * TODO type def
 */
public class UTF16CharsetEncoderTest extends CharsetEncoderTest {

	// charset for utf-16
	// charset for utf-16be
	private static final Charset CS = Charset.forName("utf-16");

	private static final CharsetDecoder decoder = CS.newDecoder();

	/*
	 * @see CharsetEncoderTest#setUp()
	 */
	protected void setUp() throws Exception {
		cs = CS;
		specifiedReplacement = new byte[] { -3, -1 };
		surrogate = new byte[] { -1, -2 };
		unibytes = new byte[] { 32, 0, 98, 0, 117, 0, 102, 0, 102, 0, 101, 0,
				114, 0 };
		unibytesWithRep = new byte[] { -3, -1, 32, 0, 98, 0, 117, 0, 102, 0,
				102, 0, 101, 0, 114, 0 };
		super.setUp();
	}

	/*
	 * @see CharsetEncoderTest#tearDown()
	 */
	protected void tearDown() throws Exception {
		super.tearDown();
	}

	public void testCharsetEncoderCharsetfloatfloat() {
		// this constructor is invalid for UTF16LE CharsetEncoder
	}

	public void testCanEncodechar() throws CharacterCodingException {
		// normal case for utfCS
		assertTrue(encoder.canEncode('\u0077'));
		assertTrue(encoder.canEncode('\uc2a3'));

		// for non-mapped char
		assertTrue(encoder.canEncode('\uc2c0'));
	}

	public void testCanEncodeCharSequence() {
		// normal case for utfCS
		assertTrue(encoder.canEncode("\u0077"));
		assertTrue(encoder.canEncode("\uc2a3"));

		// for non-mapped char
		assertTrue(encoder.canEncode("\uc2c0"));

		// surrogate char for unicode
		// 1st byte: d800-dbff
		// 2nd byte: dc00-dfff
		// valid surrogate pair
		assertTrue(encoder.canEncode("\ud800\udc00"));
		// invalid surrogate pair
		assertFalse(encoder.canEncode("\ud800\udb00"));
	}

	public void testSpecificDefaultValue() {
		assertEquals(encoder.averageBytesPerChar(), 2, 0.001);
		// assertEquals(4, encoder.maxBytesPerChar());
		// FIXME: different here!
		assertEquals(encoder.maxBytesPerChar(), 2, 0.001);
	}

	CharBuffer getMalformedCharBuffer() {
		return CharBuffer.wrap("\ud800 buffer");
	}

	CharBuffer getUnmapCharBuffer() {
		return null;
	}

	CharBuffer getExceptionCharBuffer() {
		return null;
	}

	protected byte[] getIllegalByteArray() {
	  return new byte[] { (byte)0xd8, (byte)0x00, (byte)0xdb, (byte)0x00 };
	}

	protected byte[] getLegalByteArray() {
		// FIXME: Different Here!
		// return new byte[]{(byte)0xd8, 0x00};
		return new byte[] { (byte) 0x00, (byte) 0xd8 };
	}

	void assertByteArray(ByteBuffer out, byte[] expected) {
		out = out.duplicate();
		if (out.position() > 0) {
			out.flip();
		}
		try {
			assertEquals(decoder.decode(out), decoder.decode(ByteBuffer
					.wrap(expected)));
		} catch (CharacterCodingException e) {
			fail(e.toString());
		}
	}
}