8177628: Opensource unit/regression tests for ImageIO
Reviewed-by: prr, pnarayanan
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/*
* @test
* @bug 4892609
* @summary Tests that the appropriate IllegalStateException is thrown if
* ImageReader.getNumImages() is called with a null source or if
* allowSearch is specified at the same time that seekForwardOnly is
* true
*/
import java.io.ByteArrayInputStream;
import java.util.Iterator;
import javax.imageio.ImageIO;
import javax.imageio.ImageReader;
import javax.imageio.spi.IIORegistry;
import javax.imageio.spi.ImageReaderSpi;
import javax.imageio.stream.ImageInputStream;
public class GetNumImages {
public static void main(String[] args) throws Exception {
IIORegistry registry = IIORegistry.getDefaultInstance();
// test ImageReader.getNumImages() for all available ImageReaders,
// with no source set
Iterator readerspis = registry.getServiceProviders(ImageReaderSpi.class,
false);
while (readerspis.hasNext()) {
boolean caughtEx = false;
ImageReaderSpi readerspi = (ImageReaderSpi)readerspis.next();
ImageReader reader = readerspi.createReaderInstance();
try {
reader.getNumImages(false);
} catch (IllegalStateException ise) {
// caught exception, everything's okay
caughtEx = true;
}
if (!caughtEx) {
throw new RuntimeException("Test failed: exception was not " +
"thrown for null input: " +
reader);
}
}
// test ImageReader.getNumImages() for all available ImageReaders,
// with source set, seekForwardOnly and allowSearch both true
readerspis = registry.getServiceProviders(ImageReaderSpi.class,
false);
while (readerspis.hasNext()) {
boolean caughtEx = false;
ImageReaderSpi readerspi = (ImageReaderSpi)readerspis.next();
ImageReader reader = readerspi.createReaderInstance();
byte[] barr = new byte[100];
ByteArrayInputStream bais = new ByteArrayInputStream(barr);
ImageInputStream iis = ImageIO.createImageInputStream(bais);
try {
reader.setInput(iis, true);
reader.getNumImages(true);
} catch (IllegalStateException ise) {
// caught exception, everything's okay
caughtEx = true;
}
if (!caughtEx) {
throw new RuntimeException("Test failed: exception was not " +
"thrown when allowSearch and " +
"seekForwardOnly are both true: " +
reader);
}
}
}
}