public void testProcessStandaloneBasicInterval() throws Exception {
final GridCoverage2D gc = extractCoverageSubset();
final double step = 100;
final ContourProcess process = new ContourProcess();
final SimpleFeatureCollection fc = process.execute(gc, 0, null, Double.valueOf(step),
false, false, null, new NullProgressListener());
assertNotNull(fc);
assertTrue(fc.size() > 0);