Throw the right exception

Author: zbynek

user/super/com/google/gwt/emul/java/util/Objects.java

@@ -134,7 +134,7 @@ public static <T> T requireNonNullElse(T obj, T defaultObj) {
   }
 
   public static <T> T requireNonNullElseGet(T obj, Supplier<? extends T> supplier) {
-    return obj != null ? obj : requireNonNull(supplier.get());
+    return obj != null ? obj : requireNonNull(requireNonNull(supplier, "supplier").get());
   }
 
   public static int checkIndex(int index, int length) {

user/test/com/google/gwt/emultest/java/util/ObjectsTest.java

@@ -173,7 +173,7 @@ private void assertThrows(Class<? extends Exception> thrownCheck, Runnable toTes
       toTest.run();
       fail("Should have failed");
     } catch (Exception ex) {
-      assertEquals(ex.getClass(), thrownCheck);
+      assertEquals(thrownCheck, ex.getClass());
     }
   }
 }