@Test
public void fileResourceDifferentExtensions()
{
IResourceStreamLocator resourceStreamLocator = mock(IResourceStreamLocator.class);
FileResourceStream frs = new FileResourceStream(new File("."));
when(resourceStreamLocator.locate(String.class, "path", "style", "variation", null,
"extension", true)).thenReturn(frs);
CachingResourceStreamLocator cachingLocator = new CachingResourceStreamLocator(resourceStreamLocator);