BAEL-9317 Update Parsing JSON boolean Value in Java Article

Add sections referring to mapping 0/1 values to false and true

Author: Deepak-Vohra

json-modules/json/pom.xml

@@ -59,8 +59,9 @@
     </dependencies>
 
     <properties>
+        <java.version>17</java.version>
         <networknt.json.schema.version>1.4.0</networknt.json.schema.version>
         <json-unit-assertj.version>2.28.0</json-unit-assertj.version>
     </properties>
 
-</project>
+</project>

json-modules/json/src/test/java/com/baeldung/jsonjava/CDLIntegrationTest.java

@@ -11,15 +11,15 @@
 public class CDLIntegrationTest {
 
     @Test
-    public void givenCommaDelimitedText_thenConvertToJSONArray() {
+    public void givenCommaDelimitedText_whenConvertingToJSONArray_thenCorrectJSONArrayCreated() {
         JSONArray ja = CDL.rowToJSONArray(new JSONTokener("England, USA, Canada"));
 
         assertThatJson(ja)
           .isEqualTo("[\"England\",\"USA\",\"Canada\"]");
     }
 
     @Test
-    public void givenJSONArray_thenConvertToCommaDelimitedText() {
+    public void givenJSONArray_whenConvertingToCommaDelimitedText_thenCorrectCommaDelimitedTextCreated() {
         JSONArray ja = new JSONArray("[\"England\",\"USA\",\"Canada\"]");
 
         String cdt = CDL.rowToString(ja);
@@ -28,7 +28,7 @@ public void givenJSONArray_thenConvertToCommaDelimitedText() {
     }
 
     @Test
-    public void givenCommaDelimitedText_thenGetJSONArrayOfJSONObjects() {
+    public void givenCommaDelimitedText_whenConvertingToArrayOfJSONObjects_thenCorrectArrayOfJSONObjectsCreated() {
         String string =
           "name, city, age \n" +
           "john, chicago, 22 \n" +
@@ -42,7 +42,7 @@ public void givenCommaDelimitedText_thenGetJSONArrayOfJSONObjects() {
     }
 
     @Test
-    public void givenCommaDelimitedText_thenGetJSONArrayOfJSONObjects2() {
+    public void givenCommaDelimitedText_whenConvertingToArrayOfJSONObjects2_thenCorrectArrayOfJSONObjects2Created() {
         JSONArray ja = new JSONArray();
         ja.put("name");
         ja.put("city");

json-modules/json/src/test/java/com/baeldung/jsonjava/CookieIntegrationTest.java

@@ -10,7 +10,7 @@
 public class CookieIntegrationTest {
 
     @Test
-    public void givenCookieString_thenConvertToJSONObject() {
+    public void givenCookieString_whenConvertingToJSONObject_thenCorrectJSONObjectCreated() {
         String cookie = "username=John Doe; expires=Thu, 18 Dec 2013 12:00:00 UTC; path=/";
         JSONObject cookieJO = Cookie.toJSONObject(cookie);
 
@@ -19,7 +19,7 @@ public void givenCookieString_thenConvertToJSONObject() {
     }
 
     @Test
-    public void givenJSONObject_thenConvertToCookieString() {
+    public void givenJSONObject_whenConvertingToCookieString_thenCorrectCookieStringCreated() {
         JSONObject cookieJO = new JSONObject();
         cookieJO.put("name", "username");
         cookieJO.put("value", "John Doe");

json-modules/json/src/test/java/com/baeldung/jsonjava/HTTPIntegrationTest.java

@@ -9,7 +9,7 @@
 
 public class HTTPIntegrationTest {
     @Test
-    public void givenJSONObject_thenConvertToHTTPHeader() {
+    public void givenJSONObject_whenConvertingToHTTPHeader_thenCorrectHTTPHeaderCreated() {
         JSONObject jo = new JSONObject();
         jo.put("Method", "POST");
         jo.put("Request-URI", "http://www.example.com/");
@@ -20,7 +20,7 @@ public void givenJSONObject_thenConvertToHTTPHeader() {
     }
 
     @Test
-    public void givenHTTPHeader_thenConvertToJSONObject() {
+    public void givenHTTPHeader_whenConvertingToJSONObject_thenCorrectJSONObjectCreated() {
         JSONObject obj = HTTP.toJSONObject("POST \"http://www.example.com/\" HTTP/1.1");
 
         assertThatJson(obj)

json-modules/json/src/test/java/com/baeldung/jsonjava/JSONArrayIntegrationTest.java

@@ -12,7 +12,7 @@
 public class JSONArrayIntegrationTest {
 
     @Test
-    public void givenJSONJava_thenCreateNewJSONArrayFromScratch() {
+    public void givenJSONJava_whenCreatingNewJSONArrayFromScratch_thenCorrectNewJSONArrayCreated() {
         JSONArray ja = new JSONArray();
         ja.put(Boolean.TRUE);
         ja.put("lorem ipsum");
@@ -30,15 +30,15 @@ public void givenJSONJava_thenCreateNewJSONArrayFromScratch() {
     }
 
     @Test
-    public void givenJsonString_thenCreateNewJSONArray() {
+    public void givenJsonString_whenCreatingNewJSONArray_thenCorrectNewJSONArrayCreated() {
         JSONArray ja = new JSONArray("[true, \"lorem ipsum\", 215]");
 
         assertThatJson(ja)
           .isEqualTo("[true,\"lorem ipsum\",215]");
     }
 
     @Test
-    public void givenListObject_thenConvertItToJSONArray() {
+    public void givenListObject_whenCreatingNewJSONArray_thenCorrectJSONArrayCreated() {
         List<String> list = new ArrayList<>();
         list.add("California");
         list.add("Texas");
@@ -50,4 +50,4 @@ public void givenListObject_thenConvertItToJSONArray() {
         assertThatJson(ja)
           .isEqualTo("[\"California\",\"Texas\",\"Hawaii\",\"Alaska\"]");
     }
-}
+}

json-modules/json/src/test/java/com/baeldung/jsonjava/JSONObjectIntegrationTest.java

@@ -2,7 +2,8 @@
 
 import org.json.JSONObject;
 import org.junit.Test;
-
+import static org.junit.jupiter.api.Assertions.assertTrue;
+import static org.junit.jupiter.api.Assertions.assertEquals;
 import java.util.HashMap;
 import java.util.Map;
 
@@ -11,7 +12,7 @@
 public class JSONObjectIntegrationTest {
 
     @Test
-    public void givenJSONJava_thenCreateNewJSONObject() {
+    public void givenJSONJava_whenCreatingNewJSONObject_thenCorrectNewJSONObjectCreated() {
         JSONObject jo = new JSONObject();
         jo.put("name", "jon doe");
         jo.put("age", "22");
@@ -22,7 +23,29 @@ public void givenJSONJava_thenCreateNewJSONObject() {
     }
 
     @Test
-    public void givenMapObject_thenCreateJSONObject() {
+    void givenJSON_whenParsed_thenCorrectValueReturned() {
+        String jsonString = """
+                            {
+                                "type": "Feature", 
+                                "geometry": "Point",                          
+                                "properties": {
+                                                  "isValid": true, 
+                                                  "name": "Sample Point"
+                                              }
+                            }
+                            """;
+        JSONObject jsonObject = new JSONObject(jsonString);
+        String type = jsonObject.getString("type");
+        String geometry = jsonObject.getString("geometry");
+        JSONObject properties = jsonObject.getJSONObject("properties");
+        boolean isValid = properties.getBoolean("isValid");
+        assertEquals("Feature",type);
+        assertEquals("Point",geometry);
+        assertTrue(isValid);
+    }
+
+    @Test
+    public void givenMapObject_whenCreatingNewJSONObject_thenCorrectNewJSONObjectCreated() {
         Map<String, String> map = new HashMap<>();
         map.put("name", "jon doe");
         map.put("age", "22");
@@ -34,7 +57,7 @@ public void givenMapObject_thenCreateJSONObject() {
     }
 
     @Test
-    public void givenJsonString_thenCreateJSONObject() {
+    public void givenJSONString_whenCreatingNewJSONObject_thenCorrectNewJSONObjectCreated() {
         JSONObject jo = new JSONObject(
           "{\"city\":\"chicago\",\"name\":\"jon doe\",\"age\":\"22\"}"
         );

json-modules/json/src/test/java/com/baeldung/jsonjava/JSONTokenerIntegrationTest.java

@@ -8,7 +8,7 @@
 public class JSONTokenerIntegrationTest {
 
     @Test
-    public void givenString_convertItToJSONTokens() {
+    public void givenString_whenConvertingToJSONTokens_thenCorrectlyConvertedToJSONTokens() {
         String str = "Sample String";
         JSONTokener jt = new JSONTokener(str);
 

json-modules/json/src/test/java/com/baeldung/jsonjava/ObjectToFromJSONIntegrationTest.java

@@ -8,7 +8,7 @@
 public class ObjectToFromJSONIntegrationTest {
 
     @Test
-    public void givenDemoBean_thenCreateJSONObject() {
+    public void givenDemoBean_whenCreatingJSONObject_thenCreatedJSONObjectCorrectly() {
         DemoBean demo = new DemoBean();
         demo.setId(1);
         demo.setName("lorem ipsum");

json-modules/json/src/test/java/com/baeldung/jsonjava/ParseJsonBooleanUnitTest.java

@@ -0,0 +1,54 @@
+package com.baeldung.jsonjava;
+
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.assertTrue;
+import static org.junit.jupiter.api.Assertions.assertFalse;
+import static org.assertj.core.api.Assertions.assertThat;
+
+import org.json.JSONObject;
+
+import com.google.gson.JsonObject;
+import com.google.gson.JsonParser;
+
+public class ParseJsonBooleanUnitTest {
+
+    private final String json = """
+        {
+            "name": "lorem ipsum",
+            "active": true,
+            "id": 1
+        }
+        """;
+
+    @Test
+    void givenJSONString_whenParsed_thenCorrectBooleanValueReturned() {
+        JSONObject jsonObject = new JSONObject(json);
+        boolean active = jsonObject.getBoolean("active");
+        assertTrue(active);
+    }
+
+    @Test
+    void givenJSONWithBooleanAs0Or1_whenParsed_thenCorrectBooleanValueReturned() {
+        String json = """
+            {
+                "name": "lorem ipsum",
+                "active": 1,
+                "id": 1
+            }
+            """;
+        JSONObject jsonObject = new JSONObject(json);
+        assertThat(jsonObject.getInt("active")).isEqualTo(1);
+    }
+
+    @Test
+    void givenJSONWithMixedRepresentationForBoolean_whenParsed_thenCorrectBooleanValueReturned() {
+        JSONObject jsonObject = new JSONObject(json);
+        Object activeObject = jsonObject.get("active");
+        if (activeObject instanceof Integer value) {
+            assertTrue(value == 1);
+        } else if (activeObject instanceof Boolean value) {
+            assertTrue(value);
+        }
+    }
+}