The integration test we wrote for the service earlier will start failing because of invalid credentials. We will now update the integration test to supply basic authentication credentials:

    private TestRestTemplate template = new TestRestTemplate();
    HttpHeaders headers = createHeaders("user-name", "user-password");

    HttpHeaders createHeaders(String username, String password) {
      return new HttpHeaders() {
       {
         String auth = username + ":" + password;
         byte[] encodedAuth = Base64.getEncoder().encode
         (auth.getBytes(Charset.forName("US-ASCII")));
         String authHeader = "Basic " + new String(encodedAuth);
         set("Authorization", authHeader);
        }
      };
     }

    @Test
    public void retrieveTodos() throws Exception {
      String expected = "["
      + "{id:1,user:Jack,desc:"Learn Spring MVC",done:false}" + ","
      + "{id:2,user:Jack,desc:"Learn Struts",done:false}" + "]";
      ResponseEntity<String> response = template.exchange(
      createUrl("/users/Jack/todos"), HttpMethod.GET,
      new HttpEntity<String>(null, headers),
      String.class);
      JSONAssert.assertEquals(expected, response.getBody(), false);
    }

Some important things to note are as follows:

• createHeaders("user-name", "user-password"): This method creates Base64. getEncoder().encode basic authentication headers
• ResponseEntity<String> response = template.exchange(createUrl("/users/Jack/todos"), ;HttpMethod.GET,new HttpEntity<String>(null, headers), String.class): The key change is the use of HttpEntity to supply the headers that we created earlier to the REST template