✅ Get_AlreadyAuthenticated_RedirectsToStateRedirectUri
✅ Get_NationalInsuranceNumberNotSpecified_RedirectsToNationalInsuranceNumberPage
✅ Get_NotAuthenticatedWithOneLogin_ReturnsBadRequest
✅ Get_NotVerifiedWithOneLogin_ReturnsBadRequest
✅ Get_TrnNotSpecified_RedirectsToTrnPage
✅ Get_ValidRequest_RendersExpectedContent
✅ Post_AlreadyAuthenticated_RedirectsToStateRedirectUri
✅ Post_NationalInsuranceNumberNotSpecified_RedirectsToNationalInsuranceNumberPage
✅ Post_NotAuthenticatedWithOneLogin_ReturnsBadRequest
✅ Post_NotVerifiedWithOneLogin_ReturnsBadRequest
✅ Post_TrnNotSpecified_RedirectsToTrnPage

✅ Get_AlreadyAuthenticated_RedirectsToStateRedirectUri
✅ Get_NotAuthenticatedWithOneLogin_ReturnsBadRequest
✅ Get_NotVerifiedWithOneLogin_ReturnsBadRequest
✅ Get_ValidRequest_RendersExpectedContent
✅ Post_AlreadyAuthenticated_RedirectsToStateRedirectUri
✅ Post_NotAuthenticatedWithOneLogin_ReturnsBadRequest
✅ Post_NotVerifiedWithOneLogin_ReturnsBadRequest
✅ Post_ValidRequest_RedirectsToStartOfMatchingJourney

✅ Get_NotFullyAuthenticated_RedirectsToStartOfMatchingJourney
✅ Get_ValidRequest_RendersExpectedContent
✅ Post_NotAuthenticated_RedirectsToStartOfMatchingJourney
✅ Post_ValidRequest_RedirectsToStateRedirectUri

✅ Get_AlreadyAuthenticated_RedirectsToStateRedirectUri
✅ Get_NotAuthenticatedWithOneLogin_ReturnsBadRequest
✅ Get_NotVerifiedWithOneLogin_ReturnsBadRequest
✅ Get_ValidRequest_RendersExpectedContent(haveExistingValueInState: False)
✅ Get_ValidRequest_RendersExpectedContent(haveExistingValueInState: True)
✅ Post_AlreadyAuthenticated_RedirectsToStateRedirectUri
✅ Post_EmptyNationalInsuranceNumber_RendersError
✅ Post_HaveNationalInsuranceNumberNotAnswered_RendersError
✅ Post_HaveNationalInsuranceNumberNotSpecified_UpdatesStateAndRedirectsToTrnPage
✅ Post_InvalidNationalInsuranceNumber_RendersError
✅ Post_NotAuthenticatedWithOneLogin_ReturnsBadRequest
✅ Post_NotVerifiedWithOneLogin_ReturnsBadRequest
✅ Post_ValidNationalInsuranceNumberAndLookupSucceeded_UpdatesStateUpdatesOneLoginUserCompletesAuthenticationAndRedirectsToFoundPage
✅ Post_ValidNationalInsuranceNumberButLookupFailed_UpdatesStateAndRedirectsToTrnPage

✅ Get_AlreadyAuthenticated_RedirectsToStateRedirectUri
✅ Get_NationalInsuranceNumberNotSpecified_RedirectsToNationalInsuranceNumberPage
✅ Get_NotAuthenticatedWithOneLogin_ReturnsBadRequest
✅ Get_NotVerifiedWithOneLogin_ReturnsBadRequest
✅ Get_TrnNotSpecified_RedirectsToTrnPage
✅ Get_ValidRequest_RendersExpectedContent
✅ Post_ValidRequest_RedirectsToCheckAnswersPage

✅ Get_AlreadyAuthenticated_RedirectsToStateRedirectUri
✅ Get_NotAuthenticatedWithOneLogin_ReturnsBadRequest
✅ Get_ValidRequest_ReturnsExpectedContent
✅ Get_VerifiedWithOneLogin_ReturnsBadRequest

✅ Get_AlreadyAuthenticated_RedirectsToStateRedirectUri
✅ Get_NationalInsuranceNumberNotSpecified_RedirectsToNationalInsuranceNumberPage
✅ Get_NotAuthenticatedWithOneLogin_ReturnsBadRequest
✅ Get_NotVerifiedWithOneLogin_ReturnsBadRequest
✅ Get_ValidRequest_RendersExpectedContent(haveExistingValueInState: False)
✅ Get_ValidRequest_RendersExpectedContent(haveExistingValueInState: True)
✅ Post_AlreadyAuthenticated_RedirectsToStateRedirectUri
✅ Post_EmptyTrn_RendersError
✅ Post_HaveTrnNotAnswered_RendersError
✅ Post_InvalidTrn_RendersError
✅ Post_NationalInsuranceNumberNotSpecified_RedirectsToNationalInsuranceNumberPage
✅ Post_NotAuthenticatedWithOneLogin_ReturnsBadRequest
✅ Post_NoTrnSpecified_UpdatesStateAndRedirectsToNotFoundPage
✅ Post_NotVerifiedWithOneLogin_ReturnsBadRequest
✅ Post_ValidTrnAndLookupSucceeded_UpdatesStateUpdatesOneLoginUserCompletesAuthenticationAndRedirectsToFoundPage
✅ Post_ValidTrnButLookupFailed_UpdatesStateAndRedirectsToNotFoundPage

✅ OnOneLoginCallback_AuthenticationAndVerification_VerificationFailed_RedirectsToErrorPage
✅ OnOneLoginCallback_AuthenticationAndVerification_VerificationSucceeded_RedirectsToStartOfMatchingJourney
✅ OnOneLoginCallback_AuthenticationAndVerification_VerificationSucceededAndTrnTokenMatchesVerifiedLastNameAndDateOfBirth_CompletesJourney
✅ OnOneLoginCallback_AuthenticationAndVerification_VerificationSucceededButRecordFromTrnTokenDoesNotMatchDateOfBirth_RedirectsToStartOfMatchingJourney
✅ OnOneLoginCallback_AuthenticationAndVerification_VerificationSucceededButRecordFromTrnTokenDoesNotMatchLastName_RedirectsToStartOfMatchingJourney
✅ OnOneLoginCallback_AuthenticationAndVerification_VerificationSucceededButTrnTokenDoesNotExist_RedirectsToStartOfMatchingJourney
✅ OnOneLoginCallback_AuthenticationAndVerification_VerificationSucceededButTrnTokenHasAlreadyBeenUsed_RedirectsToStartOfMatchingJourney
✅ OnOneLoginCallback_AuthenticationAndVerification_VerificationSucceededButTrnTokenHasExpired_RedirectsToStartOfMatchingJourney
✅ OnOneLoginCallback_AuthenticationOnly_UserAlreadyExistsAndTeachingRecordKnown_CompletesJourney
✅ OnOneLoginCallback_AuthenticationOnly_UserAlreadyExistsButTeachingNotRecordKnown_RequestsIdentityVerification
✅ OnOneLoginCallback_AuthenticationOnly_UserDoesNotExist_RequestsIdentityVerification
✅ TryMatchToTeachingRecord_MatchesMultipleResults_ReturnsFalseAndDoesNotSetAuthenticationTicket
✅ TryMatchToTeachingRecord_MatchesSingleResult_ReturnsTrueAndUpdatesOneLoginUserAssignsAuthenticationTicket
✅ TryMatchToTeachingRecord_MatchesSingleResultWithoutTrn_ReturnsFalseAndDoesNotSetAuthenticationTicket
✅ TryMatchToTeachingRecord_MatchesZeroResults_ReturnsFalseAndDoesNotSetAuthenticationTicket