BAEL-2327: Implement simple escaping and tests (#5745)

* BAEL-2327: Implement simple escaping and tests

* BAEL-2327: Rename test to comply with CI rules

json/pom.xml

@@ -33,6 +33,16 @@
             <groupId>org.json</groupId>
             <artifactId>json</artifactId>
             <version>20171018</version>
+        </dependency>
+        <dependency>
+            <groupId>com.google.code.gson</groupId>
+            <artifactId>gson</artifactId>
+            <version>2.8.5</version>
+        </dependency>
+        <dependency>
+            <groupId>com.fasterxml.jackson.core</groupId>
+            <artifactId>jackson-databind</artifactId>
+            <version>2.9.7</version>
         </dependency>
 		<dependency>
             <groupId>javax.json.bind</groupId>

json/src/main/java/com/baeldung/escape/JsonEscape.java

@@ -0,0 +1,41 @@
+package com.baeldung.escape;
+
+import com.fasterxml.jackson.core.JsonProcessingException;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.google.gson.JsonObject;
+import org.json.JSONObject;
+
+class JsonEscape {
+
+    String escapeJson(String input) {
+        JSONObject jsonObject = new JSONObject();
+        jsonObject.put("message", input);
+        return jsonObject.toString();
+    }
+
+    String escapeGson(String input) {
+        JsonObject gsonObject = new JsonObject();
+        gsonObject.addProperty("message", input);
+        return gsonObject.toString();
+    }
+
+    String escapeJackson(String input) throws JsonProcessingException {
+        return new ObjectMapper().writeValueAsString(new Payload(input));
+    }
+
+    static class Payload {
+        String message;
+
+        Payload(String message) {
+            this.message = message;
+        }
+
+        public String getMessage() {
+            return message;
+        }
+
+        public void setMessage(String message) {
+            this.message = message;
+        }
+    }
+}

json/src/test/java/com/baeldung/escape/JsonEscapeUnitTest.java

@@ -0,0 +1,36 @@
+package com.baeldung.escape;
+
+import com.fasterxml.jackson.core.JsonProcessingException;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+class JsonEscapeUnitTest {
+
+    private JsonEscape testedInstance;
+    private static final String EXPECTED = "{\"message\":\"Hello \\\"World\\\"\"}";
+
+    @BeforeEach
+    void setUp() {
+        testedInstance = new JsonEscape();
+    }
+
+    @Test
+    void escapeJson() {
+        String actual = testedInstance.escapeJson("Hello \"World\"");
+        assertEquals(EXPECTED, actual);
+    }
+
+    @Test
+    void escapeGson() {
+        String actual = testedInstance.escapeGson("Hello \"World\"");
+        assertEquals(EXPECTED, actual);
+    }
+
+    @Test
+    void escapeJackson() throws JsonProcessingException {
+        String actual = testedInstance.escapeJackson("Hello \"World\"");
+        assertEquals(EXPECTED, actual);
+    }
+}