com.linkedin.pinot.common.utils.JsonAssert.java Source code

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Here is the source code for com.linkedin.pinot.common.utils.JsonAssert.java

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/**
 * Copyright (C) 2014-2016 LinkedIn Corp. (pinot-core@linkedin.com)
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *         http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.linkedin.pinot.common.utils;

import com.google.common.collect.Iterators;
import java.util.Iterator;
import org.json.JSONException;
import org.json.JSONObject;
import org.testng.Assert;

/**
 * Utility class for JSON comparisons in unit tests.
 *
 */
public class JsonAssert {
    /**
     * Compare two JSON objects, ignoring field order. For example, objects {a:1, b:2} and {b:2, a:1} are equals, even
     * though they are not using string comparison.
     *
     * @param actual The actual JSON object
     * @param expected The expected JSON object
     */
    public static void assertEqualsIgnoreOrder(String actual, String expected) {
        try {
            JSONObject actualObject = new JSONObject(actual);
            JSONObject expectedObject = new JSONObject(expected);

            // Check that both objects have the same keys
            Assert.assertTrue(Iterators.elementsEqual(actualObject.sortedKeys(), expectedObject.sortedKeys()),
                    "JSON objects don't have the same keys, expected:<"
                            + Iterators.toString(expectedObject.sortedKeys()) + "> but was:<"
                            + Iterators.toString(actualObject.sortedKeys()) + ">");

            // Iterate over all the keys of one element and compare their contents
            Iterator<String> objectKeys = actualObject.keys();
            while (objectKeys.hasNext()) {
                String key = objectKeys.next();
                Object actualValue = actualObject.get(key);
                Object expectedValue = expectedObject.get(key);

                Assert.assertTrue(actualValue.getClass().equals(expectedValue.getClass()),
                        "Objects with key " + key + " don't have the same class, expected:<" + expectedValue
                                + "> but was:<" + actualValue + ">");
                if (actualValue instanceof JSONObject) {
                    assertEqualsIgnoreOrder(actualValue.toString(), expectedValue.toString());
                } else {
                    Assert.assertEquals(actualValue.toString(), expectedValue.toString(),
                            "Objects with key " + key + " don't have the same value");
                }
            }
        } catch (JSONException ex) {
            throw new RuntimeException(ex);
        }
    }
}