@Test(groups = { "unit" })

public void headerNotNull7() {
    ImmutableMap<String, String> respHeaders = ImmutableMap.of("key", "value");
    DocumentClientException dce = new DocumentClientException((String) null, (Exception) null, respHeaders, 0, (String) null);
    assertThat(dce.getResponseHeaders()).isNotNull();
    assertThat(dce.getResponseHeaders()).contains(respHeaders.entrySet().iterator().next());
}