@Test
public void testGetFileExtensionForEmptyMimeType() throws Exception {
CustomMimeTypeResolver resolver = new CustomMimeTypeResolver();
resolver.setCustomMimeTypes(new String[] {"nitf=image/nitf", "ntf=image/nitf"});
String fileExtension = resolver.getFileExtensionForMimeType("");
assertEquals(null, fileExtension);
}
@Test
public void testGetFileExtensionForMimeType_MultipleMappings() throws Exception {
CustomMimeTypeResolver resolver = new CustomMimeTypeResolver();
resolver.setCustomMimeTypes(new String[] {"nitf=image/nitf", "ntf=image/nitf"});
String fileExtension = resolver.getFileExtensionForMimeType("image/nitf");
assertEquals(".nitf", fileExtension);
}