### Question:
TempFileContentKeeper implements ContentKeeper { @Override public String getMimeContentType() { return contentProvider.getMimeContentType(); } TempFileContentKeeper(ContentProvider contentProvider); @Override InputStream getInputStream(); @Override String getMimeContentType(); @Override String getContentFileNameExt();  }### Answer:
@Test public void getMimeContentTypeTest() { when(mockContentProvider.getMimeContentType()).thenReturn("MIME_TYPE"); assertEquals(sut.getMimeContentType(), "MIME_TYPE"); }