juneau-core/juneau-core-utest/src/test/java/org/apache/juneau/utils/ParserReaderTest.java

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// *  http://www.apache.org/licenses/LICENSE-2.0                                                                             *
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package org.apache.juneau.utils;

import static org.junit.Assert.*;

import org.apache.juneau.parser.*;
import org.junit.*;

public class ParserReaderTest {

	//====================================================================================================
	// test
	//====================================================================================================
	@Test
	public void test() throws Exception {
		ParserReader r = new ParserReader(new ParserPipe("abc123"));
		try {
			assertEquals('a', r.read());
			r.unread();
			assertEquals('a', r.read());
			assertEquals('b', r.read());
			r.unread();
			assertEquals("bc", r.read(2));
			assertEquals('1', r.read());
			r.unread();
			r.read();
			assertEquals('2', r.peek());
			assertEquals('2', r.peek());
			assertEquals('2', r.read());
			assertEquals('3', r.read());
			assertEquals(-1, r.read());
			assertEquals(-1, r.read());
		} finally {
			r.close();
		}
	}
}