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- /*
- * SonarQube
- * Copyright (C) 2009-2021 SonarSource SA
- * mailto:info AT sonarsource DOT com
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 3 of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public License
- * along with this program; if not, write to the Free Software Foundation,
- * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
- */
- package org.sonar.test;
-
- import java.text.ParseException;
- import java.text.SimpleDateFormat;
- import java.util.ArrayList;
- import java.util.Collections;
- import java.util.Date;
- import java.util.HashSet;
- import java.util.List;
- import java.util.Map;
- import java.util.Set;
- import javax.annotation.CheckForNull;
- import javax.annotation.Nullable;
- import javax.annotation.concurrent.ThreadSafe;
- import org.json.simple.JSONArray;
- import org.json.simple.JSONObject;
- import org.json.simple.parser.JSONParser;
-
- import static java.util.Collections.synchronizedSet;
-
- @ThreadSafe
- class JsonComparison {
-
- private boolean strictTimezone = false;
- private boolean strictArrayOrder = false;
- private Set<String> ignoredFields = synchronizedSet(new HashSet<>());
-
- boolean isStrictTimezone() {
- return strictTimezone;
- }
-
- JsonComparison withTimezone() {
- this.strictTimezone = true;
- return this;
- }
-
- boolean isStrictArrayOrder() {
- return strictArrayOrder;
- }
-
- JsonComparison withStrictArrayOrder() {
- this.strictArrayOrder = true;
- return this;
- }
-
- JsonComparison setIgnoredFields(String... ignoredFields) {
- Collections.addAll(this.ignoredFields, ignoredFields);
- return this;
- }
-
- boolean areSimilar(String expected, String actual) {
- Object expectedJson = parse(expected);
- Object actualJson = parse(actual);
- return compare(expectedJson, actualJson);
- }
-
- private Object parse(String s) {
- try {
- JSONParser parser = new JSONParser();
- return parser.parse(s);
- } catch (Exception e) {
- throw new IllegalStateException("Invalid JSON: " + s, e);
- }
- }
-
- private boolean compare(@Nullable Object expectedObject, @Nullable Object actualObject) {
- if (expectedObject == null) {
- return actualObject == null;
- }
- if (actualObject == null) {
- // expected non-null, got null
- return false;
- }
- if (expectedObject.getClass() != actualObject.getClass()) {
- return false;
- }
- if (expectedObject instanceof JSONArray) {
- return compareArrays((JSONArray) expectedObject, (JSONArray) actualObject);
- }
- if (expectedObject instanceof JSONObject) {
- return compareObjects((JSONObject) expectedObject, (JSONObject) actualObject);
- }
- if (expectedObject instanceof String) {
- return compareStrings((String) expectedObject, (String) actualObject);
- }
- if (expectedObject instanceof Number) {
- return compareNumbers((Number) expectedObject, (Number) actualObject);
- }
- return compareBooleans((Boolean) expectedObject, (Boolean) actualObject);
- }
-
- private boolean compareBooleans(Boolean expected, Boolean actual) {
- return expected.equals(actual);
- }
-
- private boolean compareNumbers(Number expected, Number actual) {
- double d1 = expected.doubleValue();
- double d2 = actual.doubleValue();
- if (Double.compare(d1, d2) == 0) {
- return true;
- }
- return Math.abs(d1 - d2) <= 0.0000001;
- }
-
- private boolean compareStrings(String expected, String actual) {
- if (!strictTimezone) {
- // two instants with different timezones are considered as identical (2015-01-01T13:00:00+0100 and 2015-01-01T12:00:00+0000)
- Date expectedDate = tryParseDate(expected);
- Date actualDate = tryParseDate(actual);
- if (expectedDate != null && actualDate != null) {
- return expectedDate.getTime() == actualDate.getTime();
- }
- }
- return expected.equals(actual);
- }
-
- private boolean compareArrays(JSONArray expected, JSONArray actual) {
- if (strictArrayOrder) {
- return compareArraysByStrictOrder(expected, actual);
- }
- return compareArraysByLenientOrder(expected, actual);
- }
-
- private boolean compareArraysByStrictOrder(JSONArray expected, JSONArray actual) {
- if (expected.size() != actual.size()) {
- return false;
- }
-
- for (int index = 0; index < expected.size(); index++) {
- Object expectedElt = expected.get(index);
- Object actualElt = actual.get(index);
- if (!compare(expectedElt, actualElt)) {
- return false;
- }
- }
- return true;
- }
-
- private boolean compareArraysByLenientOrder(JSONArray expected, JSONArray actual) {
- if (expected.size() > actual.size()) {
- return false;
- }
-
- List remainingActual = new ArrayList(actual);
- for (Object expectedElement : expected) {
- // element can be null
- boolean found = false;
- for (Object actualElement : remainingActual) {
- if (compare(expectedElement, actualElement)) {
- found = true;
- remainingActual.remove(actualElement);
- break;
- }
- }
- if (!found) {
- return false;
- }
- }
- return remainingActual.isEmpty();
- }
-
- private boolean compareObjects(JSONObject expectedMap, JSONObject actualMap) {
- // each key-value of expected map must exist in actual map
- for (Map.Entry<Object, Object> expectedEntry : (Set<Map.Entry<Object, Object>>) expectedMap.entrySet()) {
- Object key = expectedEntry.getKey();
- if (shouldIgnoreField(key)) {
- continue;
- }
- if (!actualMap.containsKey(key)) {
- return false;
- }
- if (!compare(expectedEntry.getValue(), actualMap.get(key))) {
- return false;
- }
- }
- return true;
- }
-
- private boolean shouldIgnoreField(Object key) {
- return key instanceof String && ignoredFields.contains(key);
- }
-
- @CheckForNull
- private static Date tryParseDate(String s) {
- try {
- return new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ssZ").parse(s);
- } catch (ParseException ignored) {
- // not a datetime
- return null;
- }
- }
- }
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