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   1 /*
   2  * SonarQube
   3  * Copyright (C) 2009-2022 SonarSource SA
   4  * mailto:info AT sonarsource DOT com
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 3 of the License, or (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public License
  17  * along with this program; if not, write to the Free Software Foundation,
  18  * Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
  19  */
  20 package org.sonar.server.qualityprofile;
  21
  22 import com.google.common.io.Resources;
  23 import java.io.Reader;
  24 import java.io.StringReader;
  25 import java.io.StringWriter;
  26 import java.util.ArrayList;
  27 import java.util.Collection;
  28 import java.util.Collections;
  29 import java.util.List;
  30 import javax.annotation.Nullable;
  31 import org.junit.Rule;
  32 import org.junit.Test;
  33 import org.sonar.api.impl.utils.AlwaysIncreasingSystem2;
  34 import org.sonar.api.rule.RuleKey;
  35 import org.sonar.api.rule.RuleStatus;
  36 import org.sonar.api.rules.RuleType;
  37 import org.sonar.api.utils.System2;
  38 import org.sonar.core.util.UuidFactoryFast;
  39 import org.sonar.db.DbSession;
  40 import org.sonar.db.DbTester;
  41 import org.sonar.db.qualityprofile.ActiveRuleDto;
  42 import org.sonar.db.qualityprofile.ActiveRuleParamDto;
  43 import org.sonar.db.qualityprofile.QProfileDto;
  44 import org.sonar.db.qualityprofile.QualityProfileTesting;
  45 import org.sonar.db.rule.RuleDefinitionDto;
  46 import org.sonar.db.rule.RuleParamDto;
  47 import org.sonar.server.qualityprofile.builtin.QProfileName;
  48 import org.sonar.server.rule.RuleCreator;
  49
  50 import static java.nio.charset.StandardCharsets.UTF_8;
  51 import static org.assertj.core.api.Assertions.assertThat;
  52 import static org.assertj.core.api.Assertions.assertThatThrownBy;
  53 import static org.junit.Assert.assertThrows;
  54 import static org.mockito.ArgumentMatchers.any;
  55 import static org.mockito.ArgumentMatchers.anyList;
  56 import static org.mockito.Mockito.mock;
  57 import static org.mockito.Mockito.when;
  58 import static org.sonar.db.rule.RuleDescriptionSectionDto.createDefaultRuleDescriptionSection;
  59 import static org.sonar.db.rule.RuleTesting.newRuleWithoutDescriptionSection;
  60
  61 public class QProfileBackuperImplTest {
  62
  63   private static final String EMPTY_BACKUP = "<?xml version='1.0' encoding='UTF-8'?>" +
  64     "<profile><name>foo</name>" +
  65     "<language>js</language>" +
  66     "<rules/>" +
  67     "</profile>";
  68
  69   private final System2 system2 = new AlwaysIncreasingSystem2();
  70
  71   @Rule
  72   public DbTester db = DbTester.create(system2);
  73
  74   private final DummyReset reset = new DummyReset();
  75   private final QProfileFactory profileFactory = new DummyProfileFactory();
  76   private final RuleCreator ruleCreator = mock(RuleCreator.class);
  77
  78   private final QProfileBackuper underTest = new QProfileBackuperImpl(db.getDbClient(), reset, profileFactory, ruleCreator, new QProfileParser());
  79
  80   @Test
  81   public void backup_generates_xml_file() {
  82     RuleDefinitionDto rule = createRule();
  83     QProfileDto profile = createProfile(rule.getLanguage());
  84     ActiveRuleDto activeRule = activate(profile, rule);
  85
  86     StringWriter writer = new StringWriter();
  87     underTest.backup(db.getSession(), profile, writer);
  88
  89     assertThat(writer).hasToString("<?xml version=\"1.0\" encoding=\"UTF-8\"?>" +
  90       "<profile><name>" + profile.getName() + "</name>" +
  91       "<language>" + profile.getLanguage() + "</language>" +
  92       "<rules>" +
  93       "<rule>" +
  94       "<repositoryKey>" + rule.getRepositoryKey() + "</repositoryKey>" +
  95       "<key>" + rule.getRuleKey() + "</key>" +
  96       "<type>" + RuleType.valueOf(rule.getType()).name() + "</type>" +
  97       "<priority>" + activeRule.getSeverityString() + "</priority>" +
  98       "<parameters></parameters>" +
  99       "</rule>" +
 100       "</rules>" +
 101       "</profile>");
 102   }
 103
 104   @Test
 105   public void backup_rules_having_parameters() {
 106     RuleDefinitionDto rule = createRule();
 107     RuleParamDto param = db.rules().insertRuleParam(rule);
 108     QProfileDto profile = createProfile(rule.getLanguage());
 109     ActiveRuleDto activeRule = activate(profile, rule, param);
 110
 111     StringWriter writer = new StringWriter();
 112     underTest.backup(db.getSession(), profile, writer);
 113
 114     assertThat(writer.toString()).contains(
 115       "<rule>" +
 116         "<repositoryKey>" + rule.getRepositoryKey() + "</repositoryKey>" +
 117         "<key>" + rule.getRuleKey() + "</key>" +
 118         "<type>" + RuleType.valueOf(rule.getType()).name() + "</type>" +
 119         "<priority>" + activeRule.getSeverityString() + "</priority>" +
 120         "<parameters><parameter>" +
 121         "<key>" + param.getName() + "</key>" +
 122         "<value>20</value>" +
 123         "</parameter></parameters>" +
 124         "</rule>");
 125   }
 126
 127   @Test
 128   public void backup_empty_profile() {
 129     RuleDefinitionDto rule = createRule();
 130     QProfileDto profile = createProfile(rule.getLanguage());
 131
 132     StringWriter writer = new StringWriter();
 133     underTest.backup(db.getSession(), profile, writer);
 134
 135     assertThat(writer).hasToString("<?xml version=\"1.0\" encoding=\"UTF-8\"?>" +
 136       "<profile><name>" + profile.getName() + "</name>" +
 137       "<language>" + profile.getLanguage() + "</language>" +
 138       "<rules></rules>" +
 139       "</profile>");
 140   }
 141
 142   @Test
 143   public void backup_custom_rules_with_params() {
 144     RuleDefinitionDto templateRule = db.rules().insert(ruleDefinitionDto -> ruleDefinitionDto
 145       .setIsTemplate(true));
 146     RuleDefinitionDto rule = db.rules().insert(ruleDefinitionDto -> ruleDefinitionDto
 147       .addOrReplaceRuleDescriptionSectionDto(createDefaultRuleDescriptionSection(UuidFactoryFast.getInstance().create(), "custom rule description"))
 148       .setName("custom rule name")
 149       .setStatus(RuleStatus.READY)
 150       .setTemplateUuid(templateRule.getUuid()));
 151     RuleParamDto param = db.rules().insertRuleParam(rule);
 152     QProfileDto profile = createProfile(rule.getLanguage());
 153     ActiveRuleDto activeRule = activate(profile, rule, param);
 154
 155     StringWriter writer = new StringWriter();
 156     underTest.backup(db.getSession(), profile, writer);
 157
 158     assertThat(writer).hasToString("<?xml version=\"1.0\" encoding=\"UTF-8\"?>" +
 159       "<profile>" +
 160       "<name>" + profile.getName() + "</name>" +
 161       "<language>" + profile.getLanguage() + "</language>" +
 162       "<rules><rule>" +
 163       "<repositoryKey>" + rule.getRepositoryKey() + "</repositoryKey>" +
 164       "<key>" + rule.getKey().rule() + "</key>" +
 165       "<type>" + RuleType.valueOf(rule.getType()) + "</type>" +
 166       "<priority>" + activeRule.getSeverityString() + "</priority>" +
 167       "<name>" + rule.getName() + "</name>" +
 168       "<templateKey>" + templateRule.getKey().rule() + "</templateKey>" +
 169       "<description>" + rule.getDefaultRuleDescriptionSectionDto().getDescription() + "</description>" +
 170       "<descriptionSections><descriptionSection><key>default</key><content>" + rule.getDefaultRuleDescriptionSectionDto().getDescription() + "</content></descriptionSection></descriptionSections>" +
 171       "<parameters><parameter>" +
 172       "<key>" + param.getName() + "</key>" +
 173       "<value>20</value>" +
 174       "</parameter></parameters>" +
 175       "</rule></rules></profile>");
 176   }
 177
 178   @Test
 179   public void backup_custom_rules_without_description_section() {
 180     var rule = newRuleWithoutDescriptionSection();
 181     db.rules().insert(rule);
 182     RuleParamDto param = db.rules().insertRuleParam(rule);
 183     QProfileDto profile = createProfile(rule.getLanguage());
 184     ActiveRuleDto activeRule = activate(profile, rule, param);
 185
 186     StringWriter writer = new StringWriter();
 187     underTest.backup(db.getSession(), profile, writer);
 188
 189     assertThat(writer).hasToString("<?xml version=\"1.0\" encoding=\"UTF-8\"?>" +
 190       "<profile>" +
 191       "<name>" + profile.getName() + "</name>" +
 192       "<language>" + profile.getLanguage() + "</language>" +
 193       "<rules><rule>" +
 194       "<repositoryKey>" + rule.getRepositoryKey() + "</repositoryKey>" +
 195       "<key>" + rule.getKey().rule() + "</key>" +
 196       "<type>" + RuleType.valueOf(rule.getType()) + "</type>" +
 197       "<priority>" + activeRule.getSeverityString() + "</priority>" +
 198       "<parameters><parameter>" +
 199       "<key>" + param.getName() + "</key>" +
 200       "<value>20</value>" +
 201       "</parameter></parameters>" +
 202       "</rule></rules></profile>");
 203   }
 204
 205   @Test
 206   public void restore_backup_on_the_profile_specified_in_backup() {
 207     Reader backup = new StringReader(EMPTY_BACKUP);
 208
 209     QProfileRestoreSummary summary = underTest.restore(db.getSession(), backup, (String) null);
 210
 211     assertThat(summary.getProfile().getName()).isEqualTo("foo");
 212     assertThat(summary.getProfile().getLanguage()).isEqualTo("js");
 213
 214     assertThat(reset.calledProfile.getKee()).isEqualTo(summary.getProfile().getKee());
 215     assertThat(reset.calledActivations).isEmpty();
 216   }
 217
 218   @Test
 219   public void restore_detects_deprecated_rule_keys() {
 220     String ruleUuid = db.rules().insert(RuleKey.of("sonarjs", "s001")).getUuid();
 221     db.rules().insertDeprecatedKey(c -> c.setRuleUuid(ruleUuid).setOldRuleKey("oldkey").setOldRepositoryKey("oldrepo"));
 222
 223     Reader backup = new StringReader("<?xml version='1.0' encoding='UTF-8'?>" +
 224       "<profile><name>foo</name>" +
 225       "<language>js</language>" +
 226       "<rules>" +
 227       "<rule>" +
 228       "<repositoryKey>oldrepo</repositoryKey>" +
 229       "<key>oldkey</key>" +
 230       "<priority>BLOCKER</priority>" +
 231       "<parameters>" +
 232       "<parameter><key>bar</key><value>baz</value></parameter>" +
 233       "</parameters>" +
 234       "</rule>" +
 235       "</rules>" +
 236       "</profile>");
 237
 238     underTest.restore(db.getSession(), backup, (String) null);
 239
 240     assertThat(reset.calledActivations).hasSize(1);
 241     RuleActivation activation = reset.calledActivations.get(0);
 242     assertThat(activation.getSeverity()).isEqualTo("BLOCKER");
 243     assertThat(activation.getRuleUuid()).isEqualTo(ruleUuid);
 244     assertThat(activation.getParameter("bar")).isEqualTo("baz");
 245   }
 246
 247   @Test
 248   public void restore_ignores_deprecated_rule_keys_if_new_key_is_already_present() {
 249     String ruleUuid = db.rules().insert(RuleKey.of("sonarjs", "s001")).getUuid();
 250     db.rules().insertDeprecatedKey(c -> c.setRuleUuid(ruleUuid).setOldRuleKey("oldkey").setOldRepositoryKey("oldrepo"));
 251
 252     Reader backup = new StringReader("<?xml version='1.0' encoding='UTF-8'?>" +
 253       "<profile><name>foo</name>" +
 254       "<language>js</language>" +
 255       "<rules>" +
 256       "<rule>" +
 257       "<repositoryKey>oldrepo</repositoryKey>" +
 258       "<key>oldkey</key>" +
 259       "<priority>MAJOR</priority>" +
 260       "<parameters>" +
 261       "<parameter><key>bar</key><value>baz</value></parameter>" +
 262       "</parameters>" +
 263       "</rule>" +
 264       "<rule>" +
 265       "<repositoryKey>sonarjs</repositoryKey>" +
 266       "<key>s001</key>" +
 267       "<priority>BLOCKER</priority>" +
 268       "<parameters>" +
 269       "<parameter><key>bar2</key><value>baz2</value></parameter>" +
 270       "</parameters>" +
 271       "</rule>" +
 272       "</rules>" +
 273       "</profile>");
 274
 275     underTest.restore(db.getSession(), backup, (String) null);
 276
 277     assertThat(reset.calledActivations).hasSize(1);
 278     RuleActivation activation = reset.calledActivations.get(0);
 279     assertThat(activation.getSeverity()).isEqualTo("BLOCKER");
 280     assertThat(activation.getRuleUuid()).isEqualTo(ruleUuid);
 281     assertThat(activation.getParameter("bar2")).isEqualTo("baz2");
 282   }
 283
 284   @Test
 285   public void restore_backup_on_profile_having_different_name() {
 286     Reader backup = new StringReader(EMPTY_BACKUP);
 287
 288     QProfileRestoreSummary summary = underTest.restore(db.getSession(), backup, "bar");
 289
 290     assertThat(summary.getProfile().getName()).isEqualTo("bar");
 291     assertThat(summary.getProfile().getLanguage()).isEqualTo("js");
 292
 293     assertThat(reset.calledProfile.getKee()).isEqualTo(summary.getProfile().getKee());
 294     assertThat(reset.calledActivations).isEmpty();
 295   }
 296
 297   @Test
 298   public void restore_resets_the_activated_rules() {
 299     String ruleUuid = db.rules().insert(RuleKey.of("sonarjs", "s001")).getUuid();
 300     Reader backup = new StringReader("<?xml version='1.0' encoding='UTF-8'?>" +
 301       "<profile><name>foo</name>" +
 302       "<language>js</language>" +
 303       "<rules>" +
 304       "<rule>" +
 305       "<repositoryKey>sonarjs</repositoryKey>" +
 306       "<key>s001</key>" +
 307       "<priority>BLOCKER</priority>" +
 308       "<parameters>" +
 309       "<parameter><key>bar</key><value>baz</value></parameter>" +
 310       "</parameters>" +
 311       "</rule>" +
 312       "</rules>" +
 313       "</profile>");
 314
 315     underTest.restore(db.getSession(), backup, (String) null);
 316
 317     assertThat(reset.calledActivations).hasSize(1);
 318     RuleActivation activation = reset.calledActivations.get(0);
 319     assertThat(activation.getSeverity()).isEqualTo("BLOCKER");
 320     assertThat(activation.getRuleUuid()).isEqualTo(ruleUuid);
 321     assertThat(activation.getParameter("bar")).isEqualTo("baz");
 322   }
 323
 324   @Test
 325   public void restore_custom_rule() {
 326     when(ruleCreator.create(any(), anyList())).then(invocation -> Collections.singletonList(db.rules().insert(RuleKey.of("sonarjs", "s001")).getKey()));
 327
 328     Reader backup = new StringReader("<?xml version='1.0' encoding='UTF-8'?>" +
 329       "<profile>" +
 330       "<name>custom rule</name>" +
 331       "<language>js</language>" +
 332       "<rules><rule>" +
 333       "<repositoryKey>sonarjs</repositoryKey>" +
 334       "<key>s001</key>" +
 335       "<type>CODE_SMELL</type>" +
 336       "<priority>CRITICAL</priority>" +
 337       "<name>custom rule name</name>" +
 338       "<templateKey>rule_mc8</templateKey>" +
 339       "<description>custom rule description</description>" +
 340       "<parameters><parameter>" +
 341       "<key>bar</key>" +
 342       "<value>baz</value>" +
 343       "</parameter>" +
 344       "</parameters>" +
 345       "</rule></rules></profile>");
 346
 347     underTest.restore(db.getSession(), backup, (String) null);
 348
 349     assertThat(reset.calledActivations).hasSize(1);
 350     RuleActivation activation = reset.calledActivations.get(0);
 351     assertThat(activation.getSeverity()).isEqualTo("CRITICAL");
 352     assertThat(activation.getParameter("bar")).isEqualTo("baz");
 353   }
 354
 355   @Test
 356   public void restore_skips_rule_without_template_key_and_db_definition() {
 357     String ruleUuid = db.rules().insert(RuleKey.of("sonarjs", "s001")).getUuid();
 358     Reader backup = new StringReader("<?xml version='1.0' encoding='UTF-8'?>" +
 359       "<profile><name>foo</name>" +
 360       "<language>js</language>" +
 361       "<rules>" +
 362       "<rule>" +
 363       "<repositoryKey>sonarjs</repositoryKey>" +
 364       "<key>s001</key>" +
 365       "<priority>BLOCKER</priority>" +
 366       "<parameters>" +
 367       "<parameter><key>bar</key><value>baz</value></parameter>" +
 368       "</parameters>" +
 369       "</rule>" +
 370       "<rule>" +
 371       "<repositoryKey>sonarjs</repositoryKey>" +
 372       "<key>s002</key>" +
 373       "<priority>MAJOR</priority>" +
 374       "</rule>" +
 375       "</rules>" +
 376       "</profile>");
 377
 378     underTest.restore(db.getSession(), backup, (String) null);
 379
 380     assertThat(reset.calledActivations).hasSize(1);
 381     RuleActivation activation = reset.calledActivations.get(0);
 382     assertThat(activation.getRuleUuid()).isEqualTo(ruleUuid);
 383     assertThat(activation.getSeverity()).isEqualTo("BLOCKER");
 384     assertThat(activation.getParameter("bar")).isEqualTo("baz");
 385   }
 386
 387   @Test
 388   public void copy_profile() {
 389     RuleDefinitionDto rule = createRule();
 390     RuleParamDto param = db.rules().insertRuleParam(rule);
 391     QProfileDto from = createProfile(rule.getLanguage());
 392     ActiveRuleDto activeRule = activate(from, rule, param);
 393
 394     QProfileDto to = createProfile(rule.getLanguage());
 395     underTest.copy(db.getSession(), from, to);
 396
 397     assertThat(reset.calledActivations).extracting(RuleActivation::getRuleUuid).containsOnly(activeRule.getRuleUuid());
 398     assertThat(reset.calledActivations.get(0).getParameter(param.getName())).isEqualTo("20");
 399     assertThat(reset.calledProfile).isEqualTo(to);
 400   }
 401
 402   @Test
 403   public void fail_to_restore_if_bad_xml_format() {
 404     DbSession session = db.getSession();
 405     StringReader backup = new StringReader("<rules><rule></rules>");
 406     IllegalArgumentException thrown = assertThrows(IllegalArgumentException.class, () -> underTest.restore(session, backup, (String) null));
 407     assertThat(thrown).hasMessage("Backup XML is not valid. Root element must be <profile>.");
 408     assertThat(reset.calledProfile).isNull();
 409   }
 410
 411   @Test
 412   public void fail_to_restore_if_not_xml_backup() {
 413     DbSession session = db.getSession();
 414     StringReader backup = new StringReader("foo");
 415     assertThrows(IllegalArgumentException.class, () -> underTest.restore(session, backup, (String) null));
 416     assertThat(reset.calledProfile).isNull();
 417   }
 418
 419   @Test
 420   public void fail_to_restore_if_xml_is_not_well_formed() {
 421     assertThatThrownBy(() -> {
 422       String notWellFormedXml = "<?xml version='1.0' encoding='UTF-8'?><profile><name>\"profil\"</name><language>\"language\"</language><rules/></profile";
 423
 424       underTest.restore(db.getSession(), new StringReader(notWellFormedXml), (String) null);
 425     })
 426       .isInstanceOf(IllegalArgumentException.class)
 427       .hasMessage("Fail to restore Quality profile backup, XML document is not well formed");
 428   }
 429
 430   @Test
 431   public void fail_to_restore_if_duplicate_rule() throws Exception {
 432     DbSession session = db.getSession();
 433     String xml = Resources.toString(getClass().getResource("QProfileBackuperTest/duplicates-xml-backup.xml"), UTF_8);
 434     StringReader backup = new StringReader(xml);
 435     IllegalArgumentException thrown = assertThrows(IllegalArgumentException.class, () -> underTest.restore(session, backup, (String) null));
 436     assertThat(thrown).hasMessage("The quality profile cannot be restored as it contains duplicates for the following rules: xoo:x1, xoo:x2");
 437     assertThat(reset.calledProfile).isNull();
 438   }
 439
 440   @Test
 441   public void fail_to_restore_external_rule() {
 442     db.rules().insert(RuleKey.of("sonarjs", "s001"), r -> r.setIsExternal(true));
 443     Reader backup = new StringReader("<?xml version='1.0' encoding='UTF-8'?>" +
 444       "<profile><name>foo</name>" +
 445       "<language>js</language>" +
 446       "<rules>" +
 447       "<rule>" +
 448       "<repositoryKey>sonarjs</repositoryKey>" +
 449       "<key>s001</key>" +
 450       "<priority>BLOCKER</priority>" +
 451       "<parameters>" +
 452       "<parameter><key>bar</key><value>baz</value></parameter>" +
 453       "</parameters>" +
 454       "</rule>" +
 455       "</rules>" +
 456       "</profile>");
 457
 458     assertThatThrownBy(() -> {
 459       underTest.restore(db.getSession(), backup, (String) null);
 460     })
 461       .isInstanceOf(IllegalArgumentException.class)
 462       .hasMessage("The quality profile cannot be restored as it contains rules from external rule engines: sonarjs:s001");
 463   }
 464
 465   private RuleDefinitionDto createRule() {
 466     return db.rules().insert();
 467   }
 468
 469   private QProfileDto createProfile(String language) {
 470     return db.qualityProfiles().insert(p -> p.setLanguage(language));
 471   }
 472
 473   private ActiveRuleDto activate(QProfileDto profile, RuleDefinitionDto rule) {
 474     return db.qualityProfiles().activateRule(profile, rule);
 475   }
 476
 477   private ActiveRuleDto activate(QProfileDto profile, RuleDefinitionDto rule, RuleParamDto param) {
 478     ActiveRuleDto activeRule = db.qualityProfiles().activateRule(profile, rule);
 479     ActiveRuleParamDto dto = ActiveRuleParamDto.createFor(param)
 480       .setValue("20")
 481       .setActiveRuleUuid(activeRule.getUuid());
 482     db.getDbClient().activeRuleDao().insertParam(db.getSession(), activeRule, dto);
 483     return activeRule;
 484   }
 485
 486   private static class DummyReset implements QProfileReset {
 487     private QProfileDto calledProfile;
 488     private List<RuleActivation> calledActivations;
 489
 490     @Override
 491     public BulkChangeResult reset(DbSession dbSession, QProfileDto profile, Collection<RuleActivation> activations) {
 492       this.calledProfile = profile;
 493       this.calledActivations = new ArrayList<>(activations);
 494       return new BulkChangeResult();
 495     }
 496   }
 497
 498   private static class DummyProfileFactory implements QProfileFactory {
 499     @Override
 500     public QProfileDto getOrCreateCustom(DbSession dbSession, QProfileName key) {
 501       return QualityProfileTesting.newQualityProfileDto()
 502         .setLanguage(key.getLanguage())
 503         .setName(key.getName());
 504     }
 505
 506     @Override
 507     public QProfileDto checkAndCreateCustom(DbSession dbSession, QProfileName name) {
 508       throw new UnsupportedOperationException();
 509     }
 510
 511     @Override
 512     public QProfileDto createCustom(DbSession dbSession, QProfileName name, @Nullable String parentKey) {
 513       throw new UnsupportedOperationException();
 514     }
 515
 516     @Override
 517     public void delete(DbSession dbSession, Collection<QProfileDto> profiles) {
 518       throw new UnsupportedOperationException();
 519     }
 520   }
 521 }