nixos/keycloak: fixup login test after ui change

Author: NickCao

nixos/tests/keycloak.nix

@@ -48,8 +48,7 @@ let
             ];
           };
           environment.systemPackages = with pkgs; [
-            xmlstarlet
-            html-tidy
+            htmlq
             jq
           ];
         };
@@ -151,16 +150,14 @@ let
           # post url.
           keycloak.succeed(
               "curl -sSf -c cookie '${frontendUrl}/realms/${realm.realm}/protocol/openid-connect/auth?client_id=${client.name}&redirect_uri=urn%3Aietf%3Awg%3Aoauth%3A2.0%3Aoob&scope=openid+email&response_type=code&response_mode=query&nonce=qw4o89g3qqm' >login_form",
-              "tidy -asxml -q -m login_form || true",
-              "xml sel -T -t -m \"_:html/_:body/_:div/_:div/_:div/_:div/_:div/_:div/_:form[@id='kc-form-login']\" -v @action login_form >form_post_url",
+              "htmlq '#kc-form-login' --attribute action --filename login_form --output form_post_url"
           )
 
           # Post the login form and save the response. Once again tidy up
           # the HTML, then extract the authorization code.
           keycloak.succeed(
               "curl -sSf -L -b cookie -d 'username=${user.username}' -d 'password=${password}' -d 'credentialId=' \"$(<form_post_url)\" >auth_code_html",
-              "tidy -asxml -q -m auth_code_html || true",
-              "xml sel -T -t -m \"_:html/_:body/_:div/_:div/_:div/_:div/_:div/_:input[@id='code']\" -v @value auth_code_html >auth_code",
+              "htmlq '#code' --attribute value --filename auth_code_html --output auth_code"
           )
 
           # Exchange the authorization code for an access token.