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Merge pull request #7157 from anuraggoyal1/master 

[BAEL-3002] Comparing 2 JSON objects with Jackson
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Eric Martin 2019-07-09 20:13:29 -05:00 committed by GitHub
parent 51e1014b26 ceb3d9ba78
commit de1277c0a0
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jackson-2/src/test/java/com/baeldung/jackson/json/compare/JsonCompareUnitTest.java Normal file
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package com.baeldung.jackson.json.compare;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNotEquals;
import static org.junit.Assert.assertTrue;
import java.io.IOException;
import java.util.Comparator;
import org.junit.Test;
import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.node.NumericNode;
import com.fasterxml.jackson.databind.node.TextNode;
public class JsonCompareUnitTest {
@Test
public void givenTwoSameJsonDataObjects_whenCompared_thenAreEqual() throws IOException {
ObjectMapper mapper = new ObjectMapper();
String s1 = "{\"employee\": {\"id\": \"1212\",\"fullName\": \"John Miles\", \"age\": 34 }}";
String s2 = "{\"employee\": {\"id\": \"1212\",\"age\": 34, \"fullName\": \"John Miles\" }}";
JsonNode actualObj1 = mapper.readTree(s1);
JsonNode actualObj2 = mapper.readTree(s2);
assertEquals(actualObj1, actualObj2);
}
@Test
public void givenTwoSameNestedJsonDataObjects_whenCompared_thenEqual() throws IOException {
ObjectMapper mapper = new ObjectMapper();
String s1 = "{\"employee\": {\"id\": \"1212\",\"fullName\": \"John Miles\",\"age\": 34, \"contact\":{\"email\": \"john@xyz.com\",\"phone\": \"9999999999\"} }}";
String s2 = "{\"employee\": {\"id\": \"1212\",\"fullName\": \"John Miles\",\"age\": 34, \"contact\":{\"email\": \"john@xyz.com\",\"phone\": \"9999999999\"} }}";
JsonNode actualObj1 = mapper.readTree(s1);
JsonNode actualObj2 = mapper.readTree(s2);
assertEquals(actualObj1, actualObj2);
}
@Test
public void givenTwoSameListJsonDataObjects_whenCompared_thenEqual() throws IOException {
ObjectMapper mapper = new ObjectMapper();
String s1 = "{\"employee\": {\"id\": \"1212\",\"fullName\": \"John Miles\",\"age\": 34, \"skills\":[\"Java\", \"C++\", \"Python\"] }}";
String s2 = "{\"employee\": {\"id\": \"1212\",\"fullName\": \"John Miles\",\"age\": 34, \"skills\":[\"Java\", \"C++\", \"Python\"] }}";
JsonNode actualObj1 = mapper.readTree(s1);
JsonNode actualObj2 = mapper.readTree(s2);
assertEquals(actualObj1, actualObj2);
}
@Test
public void givenTwoJsonDataObjects_whenComparedUsingCustomNumericNodeComparator_thenEqual() throws IOException {
ObjectMapper mapper = new ObjectMapper();
String s1 = "{\"name\": \"John\",\"score\":5.0}";
String s2 = "{\"name\": \"John\",\"score\":5}";
JsonNode actualObj1 = mapper.readTree(s1);
JsonNode actualObj2 = mapper.readTree(s2);
NumericNodeComparator cmp = new NumericNodeComparator();
assertNotEquals(actualObj1, actualObj2);
assertTrue(actualObj1.equals(cmp, actualObj2));
}
public class NumericNodeComparator implements Comparator<JsonNode> {
@Override
public int compare(JsonNode o1, JsonNode o2) {
if (o1.equals(o2)) {
return 0;
}
if ((o1 instanceof NumericNode) && (o2 instanceof NumericNode)) {
Double d1 = ((NumericNode) o1).asDouble();
Double d2 = ((NumericNode) o2).asDouble();
if (d1.compareTo(d2) == 0) {
return 0;
}
}
return 1;
}
}
@Test
public void givenTwoJsonDataObjects_whenComparedUsingCustomTextNodeComparator_thenEqual() throws IOException {
ObjectMapper mapper = new ObjectMapper();
String s1 = "{\"name\": \"JOHN\",\"score\":5}";
String s2 = "{\"name\": \"John\",\"score\":5}";
JsonNode actualObj1 = mapper.readTree(s1);
JsonNode actualObj2 = mapper.readTree(s2);
TextNodeComparator cmp = new TextNodeComparator();
assertNotEquals(actualObj1, actualObj2);
assertTrue(actualObj1.equals(cmp, actualObj2));
}
public class TextNodeComparator implements Comparator<JsonNode> {
@Override
public int compare(JsonNode o1, JsonNode o2) {
if (o1.equals(o2)) {
return 0;
}
if ((o1 instanceof TextNode) && (o2 instanceof TextNode)) {
String s1 = ((TextNode) o1).asText();
String s2 = ((TextNode) o2).asText();
if (s1.equalsIgnoreCase(s2)) {
return 0;
}
}
return 1;
}
}
}