Support `@WithMockUser`

[ozooxo]

It will be very handy if we can support something similar to @WithMockUser in Spring. Then we can test an endpoint with an anonymous and authenticated user easily.

Task List

• [ ] Steps to reproduce provided
• [ ] Stacktrace (if present) provided
• [ ] Example that reproduces the problem uploaded to Github
• [ ] Full description of the issue provided (see below)

Steps to Reproduce

Assume I have

endpoints:
  health:
    enabled: true
    sensitive: false
    details-visible: AUTHENTICATED

Expected Behaviour

@MicronautTest
class HealthEndpointTest {
    val mapper = jacksonObjectMapper()

    @Inject
    lateinit var server: EmbeddedServer

    @Inject
    @field:Client("/")
    lateinit var client: HttpClient

    @Test
    fun testHealthEndpointForAnonymousUser() {
        val rsp: String = client.toBlocking().retrieve("/health")
        val json = mapper.readTree(rsp)
        assertTrue(json.hasNonNull("status"))
        assertFalse(json.hasNonNull("name"))
        assertFalse(json.hasNonNull("details"))
    }

    @Test
    @WithMockUser
    fun testHealthEndpointForAuthenticatedUser() {
        val rsp: String = client.toBlocking().retrieve("/health")
        val json = mapper.readTree(rsp)
        assertTrue(json.hasNonNull("status"))
        assertTrue(json.hasNonNull("name"))
        assertTrue(json.hasNonNull("details"))
    }

Actual Behaviour

I don't have something like @WithMockUser I can use.

Environment Information

• Operating System: Mac
• Micronaut Version: 3.0.0-M2
• JDK Version: 11

Example Application

• TODO: link to github repository with example that reproduces the issue

[AbdelHajou]

I could really use this feature. @ozooxo Do you know of any other way to mock an authenticated user currently?