Retire two old bad features

- overriding primitive type adapters
 - auto unwrapping of single element arrays

gson/GSON 2.0 NOTES.txt

@@ -0,0 +1,10 @@
+What's new in GSON 2.0
+
+GSON 1.x used to automatically unwrap single-element arrays as necessary.
+GSON 2.x doesn't.
+com.google.gson.functional.ArrayTest.testSingleStringArrayDeserialization
+
+
+GSON 1.x permitted primitive types to be overridden
+GSON 2.x doesn't.
+com.google.gson.functional.ArrayTest.testArrayOfPrimitivesWithCustomTypeAdapter

gson/src/test/java/com/google/gson/ObjectTypeAdapterTest.java

@@ -19,6 +19,7 @@ package com.google.gson;
 import com.google.gson.internal.bind.MiniGson;
 import com.google.gson.internal.bind.TypeAdapter;
 import java.util.Arrays;
+import java.util.Collections;
 import java.util.Map;
 import junit.framework.TestCase;
 
@@ -27,9 +28,11 @@ public final class ObjectTypeAdapterTest extends TestCase {
   private final TypeAdapter<Object> adapter = gson.getAdapter(Object.class);
 
   public void testDeserialize() throws Exception {
-    Map<?, ?> map = (Map) adapter.fromJson("{a: 5, b: [1, 2, null]}");
+    Map<?, ?> map = (Map) adapter.fromJson("{a: 5, b: [1, 2, null], c: {x: y}}");
     assertEquals(5.0, map.get("a"));
     assertEquals(Arrays.asList(1.0, 2.0, null), map.get("b"));
+    assertEquals(Collections.singletonMap("x", "y"), map.get("c"));
+    assertEquals(3, map.size());
   }
 
   public void testSerialize() throws Exception {

gson/src/test/java/com/google/gson/functional/ArrayTest.java

@@ -141,9 +141,6 @@ public class ArrayTest extends TestCase {
     String[] arrayType = gson.fromJson(json, String[].class);
     assertEquals(1, arrayType.length);
     assertEquals("hello", arrayType[0]);
-
-    String type = gson.fromJson(json, String.class);
-    assertEquals("hello", type);
   }
 
   @SuppressWarnings("unchecked")
@@ -181,22 +178,6 @@ public class ArrayTest extends TestCase {
     MoreAsserts.assertEquals(new Integer[] { 3, 4 }, target[1].toArray(new Integer[0]));
   }
 
-  public void testArrayOfPrimitivesWithCustomTypeAdapter() throws Exception {
-    CrazyLongTypeAdapter typeAdapter = new CrazyLongTypeAdapter();
-    gson = new GsonBuilder()
-        .registerTypeAdapter(long.class, typeAdapter)
-        .registerTypeAdapter(Long.class, typeAdapter)
-        .create();
-    long[] value = { 1L };
-    String serializedValue = gson.toJson(value);
-    String expected = "[" + String.valueOf(value[0] + CrazyLongTypeAdapter.DIFFERENCE) + "]";
-    assertEquals(expected, serializedValue);
-
-    long[] deserializedValue = gson.fromJson(serializedValue, long[].class);
-    assertEquals(1, deserializedValue.length);
-    assertEquals(value[0], deserializedValue[0]);
-  }
-
   public void testArrayOfPrimitivesAsObjectsSerialization() throws Exception {
     Object[] objs = new Object[] {1, "abc", 0.3f, 5L};
     String json = gson.toJson(objs);
@@ -215,24 +196,6 @@ public class ArrayTest extends TestCase {
     assertEquals(5, ((Number)objs[4]).shortValue());
   }
 
-  public void testArrayOfObjectsWithoutTypeInfoDeserialization() throws Exception {
-    String json = "[1,'abc',{a:1},5]";
-    try {
-      gson.fromJson(json, Object[].class);
-      fail("This is crazy....how did we deserialize it!!!");
-    } catch (JsonParseException expected) {
-    }
-  }
-
-  public void testArrayWithoutTypeInfoDeserialization() throws Exception {
-    String json = "[1,'abc',[1,2],5]";
-    try {
-      gson.fromJson(json, Object[].class);
-      fail("This is crazy....how did we deserialize it!!!");
-    } catch (JsonParseException expected) {
-    }
-  }
-
   public void testObjectArrayWithNonPrimitivesSerialization() throws Exception {
     ClassWithObjects classWithObjects = new ClassWithObjects();
     BagOfPrimitives bagOfPrimitives = new BagOfPrimitives();