1 files changed, 38 insertions, 2 deletions
diff --git a/json/src/test/java/org/json/JSONObjectTest.java b/json/src/test/java/org/json/JSONObjectTest.java
index 8abd88f..e89db94 100644
--- a/json/src/test/java/org/json/JSONObjectTest.java
+++ b/json/src/test/java/org/json/JSONObjectTest.java
@@ -28,6 +28,7 @@ import java.util.Iterator;
 import java.util.Map;
 import java.util.NoSuchElementException;
 import java.util.Set;
+import java.util.TreeMap;
 import junit.framework.TestCase;
 
 /**
@@ -988,9 +989,44 @@ public class JSONObjectTest extends TestCase {
         ArrayList<Object> list = new ArrayList<Object>();
         list.add("a");
         list.add(new ArrayList<String>());
-        HashMap<String, Object> map = new HashMap<String, Object>();
+        Map<String, Object> map = new TreeMap<String, Object>();
         map.put("x", "l");
         map.put("y", list);
-        assertEquals("{\"y\":[\"a\",[]],\"x\":\"l\"}", new JSONObject(map).toString());
+        assertEquals("{\"x\":\"l\",\"y\":[\"a\",[]]}", new JSONObject(map).toString());
+    }
+
+    public void testAppendExistingInvalidKey() throws JSONException {
+        JSONObject object = new JSONObject();
+        object.put("foo", 5);
+        try {
+            object.append("foo", 6);
+            fail();
+        } catch (JSONException expected) {
+        }
+    }
+
+    public void testAppendExistingArray() throws JSONException {
+        JSONArray array = new JSONArray();
+        JSONObject object = new JSONObject();
+        object.put("foo", array);
+        object.append("foo", 5);
+        assertEquals("[5]", array.toString());
+    }
+
+    public void testAppendPutArray() throws JSONException {
+        JSONObject object = new JSONObject();
+        object.append("foo", 5);
+        assertEquals("{\"foo\":[5]}", object.toString());
+        object.append("foo", new JSONArray());
+        assertEquals("{\"foo\":[5,[]]}", object.toString());
+    }
+
+    public void testAppendNull() {
+        JSONObject object = new JSONObject();
+        try {
+            object.append(null, 5);
+            fail();
+        } catch (JSONException e) {
+        }
     }
 }