feat: Add test cases for JsonFormatter class

This class is in com.jayway.jsonpath.internal package.Add cases to cover the following:
-Simple Json Object, Json Object Array
-Json With Escaped Characters,Json Object with Escaped Characters

json-path/src/test/java/com/jayway/jsonpath/internal/JsonFormatterTest.java

@@ -0,0 +1,61 @@
+package com.jayway.jsonpath.internal;
+
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+
+public class JsonFormatterTest {
+
+    // Test case for pretty printing a simple JSON object
+    // The input is a simple JSON object
+    // The expected output is the same JSON object with proper indentation
+    @Test
+    public void testPrettyPrint_SimpleJson() {
+        JsonFormatter jsonFormatter = new JsonFormatter();
+        String input = "{\"name\":\"Vaibhav Ramchandani\",\"age\":23,\"city\":\"Halifax\"}";
+        String actualOutput = jsonFormatter.prettyPrint(input);
+        String expectedOutput = "{\n   \"name\" : \"Vaibhav Ramchandani\",\n   \"age\" : 23,\n   \"city\" : \"Halifax\"\n}";
+        assertEquals(expectedOutput.replaceAll("\\s", ""), actualOutput.replaceAll("\\s", ""));
+    }
+
+    //  Test case for pretty printing a JSON object with escaped characters
+    // The input is a JSON object with escaped characters
+    // The expected output is the same JSON object with proper indentation
+
+    @Test
+    public void testPrettyPrint_JsonWithEscapedCharacters() {
+        JsonFormatter jsonFormatter = new JsonFormatter();
+        String input = "{\"message\":\"This is ,\\nJsonPath Repo!\"}";
+        String actualOutput = jsonFormatter.prettyPrint(input);
+        String expectedOutput = "{\n   \"message\" : \"This is ,\\nJsonPath Repo!\"\n}";
+        assertEquals(expectedOutput.replaceAll("\\s", ""), actualOutput.replaceAll("\\s", ""));
+    }
+
+    // Test case for pretty printing a JSON array
+    // The input is a JSON array
+    // The expected output is the same JSON array with proper indentation
+    @Test
+    public void testPrettyPrint_JsonWithArray() {
+
+        JsonFormatter jsonFormatter = new JsonFormatter();
+        String input = "[{\"name\":\"Vaibhav R\",\"age\":23},{\"name\":\"Sanskar K\",\"age\":24}]";
+        String actualOutput=jsonFormatter.prettyPrint(input);
+        String expectedOutput = "[\n   {\n      \"name\" : \"Vaibhav R\",\n      \"age\" : 23\n   },\n   {\n      \"name\" : \"Sanskar K\",\n      \"age\" : 24\n   }\n]";
+        assertEquals(expectedOutput.replaceAll("\\s", ""), actualOutput.replaceAll("\\s", ""));
+    }
+
+    // Test case for pretty printing a JSON object with single quotes
+    // The input is a JSON object with single quotes
+    // The expected output is the same JSON object with proper indentation
+    @Test
+    public void testPrettyPrint_JsonWithSingleQuotes() {
+
+        JsonFormatter jsonFormatter = new JsonFormatter();
+        String input = "{'name':'Vaibhav Ramchandani','age':23,'city':'Halifax'}";
+        String actualOutput = jsonFormatter.prettyPrint(input);
+        String expectedOutput = "{\n   'name' : 'Vaibhav Ramchandani',\n   'age' : 23,\n   'city' : 'Halifax'\n}";
+        assertEquals(expectedOutput.replaceAll("\\s", ""), actualOutput.replaceAll("\\s", ""));
+    }
+}
+