sso_proxy: add additional test for ux flow

Author: Jusshersmith

internal/proxy/oauthproxy_test.go

@@ -837,6 +837,20 @@ func TestAuthenticationUXFlows(t *testing.T) {
 			},
 			ExpectStatusCode: http.StatusFound,
 		},
+		{
+			Name: "authorized against different upstream, redirect to sign-in",
+			SessionStore: &sessions.MockSessionStore{
+				Session: &sessions.SessionState{
+					Email:              "[email protected]",
+					AuthorizedUpstream: "foo",
+					AccessToken:        "my_access_token",
+					LifetimeDeadline:   time.Now().Add(time.Duration(24) * time.Hour),
+					RefreshDeadline:    time.Now().Add(time.Duration(1) * time.Hour),
+					ValidDeadline:      time.Now().Add(time.Duration(1) * time.Minute),
+				},
+			},
+			ExpectStatusCode: http.StatusFound,
+		},
 	}
 	for _, tc := range testCases {
 		t.Run(tc.Name, func(t *testing.T) {