### Question:
AuthorizationHeadersProvider extends BasicHttpHeadersProvider { public void addAuthorization(final String authorization) { if (Strings.isBlank(authorization)) { return; } getHttpHeaders().set(AUTHORIZATION_HEADER, authorization); }  void addAuthorization(final String authorization); void removeAuthorization();  }### Answer:
@Test public void testBlankAuthorization() { final HttpHeaders headers = provider.getHttpHeaders(); final int size = headers.size(); provider.addAuthorization(BLANK_EXAMPLE); assertEquals(size, headers.size()); }
@Test public void testEmptyAuthorization() { final HttpHeaders headers = provider.getHttpHeaders(); final int size = headers.size(); provider.addAuthorization(EMPTY); assertEquals(size, headers.size()); }
@Test public void testNullAuthorization() { final HttpHeaders headers = provider.getHttpHeaders(); final int size = headers.size(); provider.addAuthorization(null); assertEquals(size, headers.size()); }