src/test/java/org/apache/sling/thumbnails/internal/transformers/GreyscaleHandlerTest.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.sling.thumbnails.internal.transformers;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNotEquals;

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.Collections;

import org.apache.sling.thumbnails.internal.models.TransformationHandlerConfigImpl;
import org.apache.sling.thumbnails.TransformationHandlerConfig;
import org.junit.Before;
import org.junit.Test;

public class GreyscaleHandlerTest {

    private ByteArrayOutputStream outputStream;
    private InputStream inputStream;
    private GreyscaleHandler decolorizer;

    @Before
    public void init() {
        inputStream = getClass().getClassLoader().getResourceAsStream("apache.png");
        outputStream = new ByteArrayOutputStream();
        decolorizer = new GreyscaleHandler();
    }

    @Test
    public void testResourceType() throws IOException {
        assertEquals("sling/thumbnails/transformers/greyscale", decolorizer.getResourceType());
    }

    @Test
    public void testColorize() throws IOException {
        TransformationHandlerConfig config = new TransformationHandlerConfigImpl("/conf", Collections.emptyMap());
        decolorizer.handle(inputStream, outputStream, config);
        assertNotEquals(0, outputStream.toByteArray().length);
    }

}