adding test around login with username and password

vector/src/test/java/im/vector/app/features/onboarding/OnboardingViewModelTest.kt

@@ -75,6 +75,7 @@ private val DEFAULT_SELECTED_HOMESERVER_STATE = SELECTED_HOMESERVER_STATE.copy(u
 private const val AN_EMAIL = "hello@example.com"
 private const val A_PASSWORD = "a-password"
 private const val A_USERNAME = "hello-world"
+private const val A_DEVICE_NAME = "a-device-name"
 private const val A_MATRIX_ID = "@$A_USERNAME:matrix.org"
 private const val A_LOGIN_TOKEN = "a-login-token"
 
@@ -161,6 +162,25 @@ class OnboardingViewModelTest {
                 .finish()
     }
 
+    @Test
+    fun `given can login with username and password, when logging in, then emits AccountSignedIn`() = runTest {
+        val test = viewModel.test()
+        fakeAuthenticationService.givenLoginWizard(fakeLoginWizard)
+        fakeLoginWizard.givenLoginSuccess(A_USERNAME, A_PASSWORD, A_DEVICE_NAME, fakeSession)
+        givenInitialisesSession(fakeSession)
+
+        viewModel.handle(OnboardingAction.AuthenticateAction.Login(A_USERNAME, A_PASSWORD, A_DEVICE_NAME))
+
+        test
+                .assertStatesChanges(
+                        initialState,
+                        { copy(isLoading = true) },
+                        { copy(isLoading = false) }
+                )
+                .assertEvents(OnboardingViewEvents.OnAccountSignedIn)
+                .finish()
+    }
+
     @Test
     fun `given registration started with currentThreePid, when handling InitWith, then emits restored session OnSendEmailSuccess`() = runTest {
         val test = viewModel.test()

vector/src/test/java/im/vector/app/test/fakes/FakeLoginWizard.kt

@@ -33,6 +33,10 @@ class FakeLoginWizard : LoginWizard by mockk() {
         coEvery { loginWithToken(token) } returns result
     }
 
+    fun givenLoginSuccess(username: String, password: String, deviceName: String, result: Session) {
+        coEvery { login(username, password, deviceName) } returns result
+    }
+
     fun givenConfirmResetPasswordSuccess(password: String) {
         coJustRun { resetPasswordMailConfirmed(password) }
     }