final File file = TestData.file(this, fileName);
final MrSIDFormatFactory factory = new MrSIDFormatFactory();
final BaseGDALGridFormat format = (BaseGDALGridFormat) factory.createFormat();
Assert.assertTrue(format.accepts(file));
MrSIDReader reader = (MrSIDReader) format.getReader(file);
final int numImages = reader.getGridCoverageCount();
final boolean hasMoreGridCoverages = reader.hasMoreGridCoverages();
Assert.assertEquals(1, numImages);