MockWebServer BasicAuth with Spring - spring

Question

I need to do tests by calling an external API, where I do the following:
Service Class:
public class BatchStatusClient {
#Value("${batchStatusUpdate.username}")
private String username;
#Value("${batchStatusUpdate.password}")
private String password;
public BatchStatusClient(#Value("${batchStatusUpdate.endpoint}")
String urlBatchStatusUpdate) {
this.webClient = WebClient.create("urlBatchStatusUpdate");
}
public Mono<JsonNode> getToken(String uuid) {
return this.webClient.post()
.uri("/authorization")
.headers(httpHeaders1 -> {
httpHeaders1.setBasicAuth(username, password);
httpHeaders1.add(REQUEST_ALLOW_ORIGIN, "*");
httpHeaders1.add(REQUEST_ALLOW_CREDENTIALS, "false");
httpHeaders1.add(HttpHeaders.CONTENT_TYPE,
MediaType.APPLICATION_FORM_URLENCODED_VALUE);
})
.body(BodyInserters.fromFormData("grant_type", grantType))
.retrieve()
.bodyToMono(JsonNode.class);
}
}
Test Class:
#TestPropertySource(locations = "classpath:/application-dev.yml")
#SpringBootTest()
#ExtendWith(SpringExtension.class)
#ActiveProfiles("dev")
#ContextConfiguration(classes = BatchStatusClient.class)
public class BatchStatusClientTest {
private BatchStatusClient batchStatusClient;
private static MockWebServer mockWebServer;
#BeforeEach
public void setup() throws IOException {
mockWebServer = new MockWebServer();
mockWebServer.start(9090);
this.batchStatusClient = new BatchStatusClient(
mockWebServer.url("/").toString());
}
#AfterAll
static void tearDown() throws IOException {
mockWebServer.shutdown();
}
#Test
public void test_getToken() throws Exception {
String jsonString = "{\"access_token\": \"QB7VGhGtQWEXB3J98lIjF3\"}";
ObjectMapper mapper = new ObjectMapper();
JsonNode jn = mapper.readTree(jsonString);
mockWebServer.enqueue(new MockResponse()
.setBody(new ObjectMapper().writeValueAsString(jn))
.addHeader(HttpHeaders.CONTENT_TYPE,
MediaType.APPLICATION_JSON_VALUE));
Mono<JsonNode> result = batchStatusClient.getToken("123");
System.out.println("result = " + result);
assertEquals("QB7VGhGtQWEXB3J98lIjF",
result.block().get("access_token").asText());
}
}
But when I run the test I have the following exception:
java.lang.IllegalArgumentException: Username must not be null
at org.springframework.util.Assert.notNull(Assert.java:201)
at org.springframework.http.HttpHeaders.encodeBasicAuth(HttpHeaders.java:1834)
at org.springframework.http.HttpHeaders.setBasicAuth(HttpHeaders.java:770)
at org.springframework.http.HttpHeaders.setBasicAuth(HttpHeaders.java:751)
Should I do any extra configuration?

Answer 1

With these modifications it worked for me:
BatchStatusClient class:
public BatchStatusClient(#Value("${batchStatusUpdate.endpoint}")
String urlBatchStatusUpdate,
#Value("${batchStatusUpdate.username}") String username,
#Value("${batchStatusUpdate.password}") String password){
this.webClient = WebClient.create(urlBatchStatusUpdate);
this.username = username;
this.password = password;
In setup method:
#BeforeEach
void setup() throws IOException {
this.mockWebServer = new MockWebServer();
this.batchStatusClient = new BatchStatusClient(
mockWebServer.url("/").toString(), "username", "password"
);
}