Need help testing a REST controller that requires oauth2 - spring-boot

Question

I am following this example for how to test my REST controller with oauth2. Testing an OAuth Secured API with Spring MVC
The code that I am stuck on is this line .with(httpBasic("fooClientIdPassword","secret"))
Does anyone know where is httpBasic method coming from? How is it instantiated, etc.? Thank you.
private String obtainAccessToken(String username, String password) throws Exception {
MultiValueMap<String, String> params = new LinkedMultiValueMap<>();
params.add("grant_type", "password");
params.add("client_id", "fooClientIdPassword");
params.add("username", username);
params.add("password", password);
ResultActions result
= mockMvc.perform(post("/oauth/token")
.params(params)
.with(httpBasic("fooClientIdPassword","secret"))
.accept("application/json;charset=UTF-8"))
.andExpect(status().isOk())
.andExpect(content().contentType("application/json;charset=UTF-8"));
String resultString = result.andReturn().getResponse().getContentAsString();
JacksonJsonParser jsonParser = new JacksonJsonParser();
return jsonParser.parseMap(resultString).get("access_token").toString();
}

Answer 1

The httpBasic method comes from SecurityMockMvcRequestPostProcessors
I suppose you cannot find it cause you have not imported the dependency in your project. Once you add
<dependency>
<groupId>org.springframework.security</groupId>
<artifactId>spring-security-test</artifactId>
<scope>test</scope>
</dependency>
in your pom you will be able to import and use it.