Merge pull request google#689 from vbauer/util-classes

Add unit tests for constructors from util classes

Author: swankjesse

gson/src/main/java/com/google/gson/internal/$Gson$Preconditions.java

@@ -30,6 +30,10 @@
  * @author Joel Leitch
  */
 public final class $Gson$Preconditions {
+  private $Gson$Preconditions() {
+    throw new UnsupportedOperationException();
+  }
+
   public static <T> T checkNotNull(T obj) {
     if (obj == null) {
       throw new NullPointerException();

gson/src/main/java/com/google/gson/internal/$Gson$Types.java

@@ -43,7 +43,9 @@
 public final class $Gson$Types {
   static final Type[] EMPTY_TYPE_ARRAY = new Type[] {};
 
-  private $Gson$Types() {}
+  private $Gson$Types() {
+    throw new UnsupportedOperationException();
+  }
 
   /**
    * Returns a new parameterized type, applying {@code typeArguments} to

gson/src/main/java/com/google/gson/internal/Primitives.java

@@ -29,7 +29,9 @@
  * @author Kevin Bourrillion
  */
 public final class Primitives {
-  private Primitives() {}
+  private Primitives() {
+    throw new UnsupportedOperationException();
+  }
 
   /** A map from primitive types to their corresponding wrapper types. */
   private static final Map<Class<?>, Class<?>> PRIMITIVE_TO_WRAPPER_TYPE;

gson/src/main/java/com/google/gson/internal/Streams.java

@@ -33,6 +33,10 @@
  * Reads and writes GSON parse trees over streams.
  */
 public final class Streams {
+  private Streams() {
+    throw new UnsupportedOperationException();
+  }
+
   /**
    * Takes a reader in any state and returns the next value as a JsonElement.
    */

gson/src/main/java/com/google/gson/internal/bind/TypeAdapters.java

@@ -55,7 +55,9 @@
  * Type adapters for basic types.
  */
 public final class TypeAdapters {
-  private TypeAdapters() {}
+  private TypeAdapters() {
+    throw new UnsupportedOperationException();
+  }
 
   @SuppressWarnings("rawtypes")
   public static final TypeAdapter<Class> CLASS = new TypeAdapter<Class>() {

gson/src/test/java/com/google/gson/common/MoreAsserts.java

@@ -69,4 +69,5 @@ public static void assertEqualsAndHashCode(Object a, Object b) {
     Assert.assertFalse(a.equals(null));
     Assert.assertFalse(a.equals(new Object()));
   }
+
 }