fop/test/java/org/apache/fop/render/ps/fonts/PSTTFTableOutputStreamTestCase.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.
 */

/* $Id$ */

package org.apache.fop.render.ps.fonts;

import java.io.IOException;

import org.junit.Before;
import org.junit.Test;
import org.mockito.InOrder;

import static org.mockito.Mockito.inOrder;
import static org.mockito.Mockito.mock;

/**
 * Test class for unit testing PSTTFTableOutputStream
 */
public class PSTTFTableOutputStreamTestCase {
    private PSTTFGenerator mockGen;
    private PSTTFTableOutputStream tableOut;

    @Before
    public void setUp() {
        mockGen = mock(PSTTFGenerator.class);
        tableOut = new PSTTFTableOutputStream(mockGen);
    }

    /**
     * Test streamTable() - several paths to test (2. and 3. test corner cases):
     * 1) that a table of length < PSTTFGenerator.MAX_BUFFER_SIZE invokes the correct methods in
     * PSTTFGenerator.
     * 2) that a table of length > PSTTFGenerator.MAX_BUFFER_SIZE and
     * length == n * PSTTFGenerator.MAX_BUFFER_SIZE is split up and the methods in PSTTFGenerator
     * are invoked.
     * 3) that a table of length > PSTTFGenerator.MAX_BUFFER_SIZE but
     * length != n * PSTTFGenerator.MAX_BUFFER_SIZE is split up and the methods in PSTTFGenerator
     * are invoked.
     * @throws IOException file write error.
     */
    @Test
    public void testStreamTable() throws IOException {
        byte[] byteArray = new byte[PSTTFGenerator.MAX_BUFFER_SIZE * 3];
        tableOut.streamTable(byteArray, 0, 10);
        InOrder inOrder = inOrder(mockGen);
        inOrder.verify(mockGen).startString();
        inOrder.verify(mockGen).streamBytes(byteArray, 0, 10);
        inOrder.verify(mockGen).endString();

        setUp(); // reset all all the method calls
        /* We're going to run this 3 times to ensure the proper method calls are invoked and all
         * the bytes are streamed */
        tableOut.streamTable(byteArray, 0, byteArray.length);
        inOrder = inOrder(mockGen);
        for (int i = 0; i < 3; i++) {
            int offset = PSTTFGenerator.MAX_BUFFER_SIZE * i;
            inOrder.verify(mockGen).startString();
            inOrder.verify(mockGen).streamBytes(byteArray, offset, PSTTFGenerator.MAX_BUFFER_SIZE);
            inOrder.verify(mockGen).endString();
        }

        setUp(); // reset all the method calls
        tableOut.streamTable(byteArray, 0, PSTTFGenerator.MAX_BUFFER_SIZE + 1);
        inOrder = inOrder(mockGen);
        inOrder.verify(mockGen).startString();
        inOrder.verify(mockGen).streamBytes(byteArray, 0, PSTTFGenerator.MAX_BUFFER_SIZE);
        inOrder.verify(mockGen).endString();
        inOrder.verify(mockGen).startString();
        inOrder.verify(mockGen).streamBytes(byteArray, PSTTFGenerator.MAX_BUFFER_SIZE, 1);
        inOrder.verify(mockGen).endString();
    }
}