Add test for sso redirect

tests/client_api.cpp

@@ -126,6 +126,14 @@ TEST(ClientAPI, LoginFlows)
         mtx_client->close();
 }
 
+TEST(ClientAPI, SSORedirect)
+{
+        std::shared_ptr<Client> mtx_client = std::make_shared<Client>("localhost");
+        EXPECT_EQ(mtx_client->login_sso_redirect("http://aaa:555/sso"),
+                  "https://localhost:443/_matrix/client/r0/login/sso/"
+                  "redirect?redirectUrl=http%3A%2F%2Faaa%3A555%2Fsso");
+}
+
 TEST(ClientAPI, EmptyUserAvatar)
 {
         auto alice = std::make_shared<Client>("localhost");