jena-base/src/test/java/org/apache/jena/atlas/io/TestBufferingWriter.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.jena.atlas.io ;

import java.io.StringWriter ;

import org.apache.jena.atlas.junit.BaseTest ;
import org.junit.Test ;

public class TestBufferingWriter extends BaseTest {
    StringWriter    sw = null ;
    BufferingWriter w  = null ;

    public void create(int size, int blobSize) {
        sw = new StringWriter() ;
        w = new BufferingWriter(sw, size, blobSize) ;
    }

    public String string() {
        return sw.toString() ;
    }

    @Test
    public void write_01() {
        create(10, 5) ;
        w.output("x") ;
        w.flush() ;
        String x = string() ;
        assertEquals("x", x) ;
    }

    @Test
    public void write_02() {
        create(10, 5) ;
        w.output("foofoo") ; // Large object
        w.flush() ;
        String x = string() ;
        assertEquals("foofoo", x) ;
    }

    @Test
    public void write_03() {
        create(10, 8) ;
        w.output("a") ;
        w.output("b") ;
        w.output("c") ;
        w.flush() ;
        String x = string() ;
        assertEquals("abc", x) ;
    }

    @Test
    public void write_04() {
        create(10, 8) ;
        w.output("abcdefghijklmnopqrstuvwxyz") ;
        w.output("XYZ") ;
        w.flush() ;
        String x = string() ;
        assertEquals("abcdefghijklmnopqrstuvwxyzXYZ", x) ;
    }

    @Test
    public void write_05() {
        create(10, 8) ;
        w.output("") ;
        w.flush() ;
        String x = string() ;
        assertEquals("", x) ;
    }

    @Test
    public void write_06() {
        // Test closing the stream without flushing (the flush should be done
        // implicitly)
        create(100, 50) ;
        w.output("test") ;
        w.close() ;
        String x = string() ;
        assertEquals("test", x) ;
    }

    @Test // JENA-19219
    public void write_07() {
        create(8194, 4098);
        for (int i = 0; i < 8194;i++) {
            w.output('a');
        }
        w.close();
        String x = string();
        assertEquals(x.length(), 8194);
    }

    @Test // JENA-1920
    public void write_08() {
        create(8192, 4096);
        char[] chars = new char[8192];
        //define enough to make it a 'large blob'
        for(int i = 0; i < 5000; i++){
            chars[i] = '1';
        }
        w.output(chars, 0, 5000);
        w.close();
        String x = string();
        assertEquals(5000, x.length());
    }
}