Setting an explicit locale in locale-sensitive tests.

(cherry picked from commit e1088f7)

Fix copyright date

Author: iamstolis

graal-js/src/com.oracle.truffle.js.parser/src/com/oracle/truffle/js/parser/date/DateParser.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2018, 2023, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2018, 2025, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * The Universal Permissive License (UPL), Version 1.0

graal-js/src/com.oracle.truffle.js.test/js/GR-53722.js

@@ -1,12 +1,14 @@
 /*
- * Copyright (c) 2024, 2024, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2024, 2025, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * Licensed under the Universal Permissive License v 1.0 as shown at http://oss.oracle.com/licenses/upl.
  */
 
 /**
  * Regression test of the handling of SafeInteger by PluralRules.
+ * 
+ * @option locale=en
  */
 
 load('assert.js');

graal-js/src/com.oracle.truffle.js.test/src/com/oracle/truffle/js/test/interop/ForeignBoxedObjectTest.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2020, 2024, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2020, 2025, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * The Universal Permissive License (UPL), Version 1.0
@@ -48,6 +48,7 @@
 import org.graalvm.polyglot.Context;
 import org.junit.Test;
 
+import com.oracle.truffle.js.runtime.JSContextOptions;
 import com.oracle.truffle.js.test.JSTest;
 import com.oracle.truffle.js.test.polyglot.ForeignBoxedObject;
 import com.oracle.truffle.js.test.polyglot.ForeignNull;
@@ -84,7 +85,7 @@ public void testForeignBoxedString() {
 
     @Test
     public void testForeignBoxedNumber() {
-        try (Context context = JSTest.newContextBuilder().build()) {
+        try (Context context = JSTest.newContextBuilder().option(JSContextOptions.LOCALE_NAME, "en").build()) {
             context.getBindings("js").putMember("obj", ForeignBoxedObject.createNew(42));
             assertTrue(context.eval(ID, "typeof Object(obj) === 'object'").asBoolean());
             assertTrue(context.eval(ID, "typeof obj.valueOf === 'function'").asBoolean());

graal-js/src/com.oracle.truffle.js.test/src/com/oracle/truffle/js/test/runtime/ZoneRulesProviderTest.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2022, 2022, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2022, 2025, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * The Universal Permissive License (UPL), Version 1.0
@@ -86,6 +86,7 @@ public void testIntl() {
 
     private static Context newContext(boolean intl) {
         return JSTest.newContextBuilder().//
+                        option(JSContextOptions.LOCALE_NAME, "en").//
                         option(JSContextOptions.TIME_ZONE_NAME, "Europe/Prague").//
                         option(JSContextOptions.INTL_402_NAME, Boolean.toString(intl)).//
                         option(JSContextOptions.ZONE_RULES_BASED_TIME_ZONES_NAME, "true").//