@Test public void parseCacheHeaders_headersSet() {

    headers.put("MyCustomHeader", "42");
    NetworkResponse response = new NetworkResponse(0, new byte[0], Headers.of(headers), 0);
    Cache.Entry entry = HttpHeaderParser.parseCacheHeaders(response);
    assertNotNull(entry);
    assertNotNull(entry.responseHeaders);
    assertEquals(1, entry.responseHeaders.size());
    assertEquals("42", entry.responseHeaders.get("MyCustomHeader"));
}