Add method to compare two json string

PDWEB-264

Author: Egor Martsynkovsky

commons/src/main/java/com/itextpdf/commons/utils/JsonUtil.java

@@ -32,6 +32,7 @@ This file is part of the iText (R) project.
 import com.fasterxml.jackson.core.util.DefaultPrettyPrinter;
 import com.fasterxml.jackson.databind.DeserializationFeature;
 import com.fasterxml.jackson.databind.JavaType;
+import com.fasterxml.jackson.databind.JsonNode;
 import com.fasterxml.jackson.databind.ObjectMapper;
 import com.fasterxml.jackson.databind.ObjectWriter;
 import com.fasterxml.jackson.databind.SerializationFeature;
@@ -51,6 +52,25 @@ private JsonUtil() {
         // empty constructor
     }
 
+    /**
+     * Compares two json strings without considering the order of the elements.
+     *
+     * @param expectedString expected json string
+     * @param toCompare      string for comparison
+     *
+     * @return true if two json string are equals, false otherwise
+     *
+     * @throws IOException if an I/O error occurs
+     */
+    public static boolean areTwoJsonObjectEquals(String expectedString, String toCompare) throws IOException {
+        final ObjectMapper mapper = new ObjectMapper();
+
+        JsonNode expectedObject = mapper.readTree(expectedString);
+        JsonNode actualObject = mapper.readTree(toCompare);
+
+        return actualObject.equals(expectedObject);
+    }
+
     /**
      * Serializes passed object to provided JSON output stream.
      *

commons/src/test/java/com/itextpdf/commons/utils/JsonUtilTest.java

@@ -72,7 +72,7 @@ public void serializeInstanceWithEnumStringTest() throws IOException {
         String resultString = JsonUtil.serializeToString(classWithEnum);
 
         String cmpString = getJsonStringFromFile(cmp);
-        Assert.assertEquals(cmpString, resultString);
+        Assert.assertTrue(JsonUtil.areTwoJsonObjectEquals(cmpString, resultString));
     }
 
     @Test
@@ -97,7 +97,7 @@ public void serializeToMinimalInstanceWithEnumStringTest() throws IOException {
         String resultString = JsonUtil.serializeToMinimalString(classWithEnum);
 
         String compareString = getJsonStringFromFile(cmp);
-        Assert.assertEquals(compareString, resultString);
+        Assert.assertTrue(JsonUtil.areTwoJsonObjectEquals(compareString, resultString));
     }
 
     @Test
@@ -122,7 +122,7 @@ public void serializeStringWithLineBreakStringTest() throws IOException {
         String resultString = JsonUtil.serializeToString(stringsForSerialization);
 
         String cmpString = getJsonStringFromFile(cmp);
-        Assert.assertEquals(cmpString, resultString);
+        Assert.assertEquals(cmpString,resultString);
     }
 
     @Test
@@ -146,7 +146,7 @@ public void serializeToMinimalStringWithLineBreakStringTest() throws IOException
         String resultString = JsonUtil.serializeToMinimalString(stringsForSerialization);
 
         String cmpString = getJsonStringFromFile(cmp);
-        Assert.assertEquals(cmpString, resultString);
+        Assert.assertEquals(cmpString,resultString);
     }
 
     @Test
@@ -170,7 +170,7 @@ public void serializeComplexStructureStringTest() throws IOException {
         String resultString = JsonUtil.serializeToString(complexStructure);
 
         String compareString = getJsonStringFromFile(cmp);
-        Assert.assertEquals(compareString, resultString);
+        Assert.assertTrue(JsonUtil.areTwoJsonObjectEquals(compareString, resultString));
     }
 
     @Test
@@ -195,7 +195,7 @@ public void serializeToMinimalComplexStructureStringTest() throws IOException {
         String resultString = JsonUtil.serializeToMinimalString(complexStructure);
 
         String compareString = getJsonStringFromFile(cmp);
-        Assert.assertEquals(compareString, resultString);
+        Assert.assertTrue(JsonUtil.areTwoJsonObjectEquals(compareString, resultString));
     }
 
     @Test
@@ -221,7 +221,7 @@ public void serializeWithNullFieldsStringTest() throws IOException {
         String resultString = JsonUtil.serializeToString(complexStructure);
 
         String compareString = getJsonStringFromFile(cmp);
-        Assert.assertEquals(compareString, resultString);
+        Assert.assertTrue(JsonUtil.areTwoJsonObjectEquals(compareString, resultString));
     }
 
     @Test
@@ -247,7 +247,7 @@ public void serializeToMinimalWithNullFieldsStringTest() throws IOException {
         String resultString = JsonUtil.serializeToMinimalString(complexStructure);
 
         String compareString = getJsonStringFromFile(cmp);
-        Assert.assertEquals(compareString, resultString);
+        Assert.assertTrue(JsonUtil.areTwoJsonObjectEquals(compareString, resultString));
     }
 
     @Test