@Test
 public void testParameterizedConstantValue() {
   final FormValidation validation = testValidator.validateGlobalConstantValue("${VALUE}");
   assertEquals(
       "Warning if parameterized global constant value",
       FormValidation.Kind.WARNING,
       validation.kind);
 }
 @Test
 public void testValidConstantValue() {
   final FormValidation validation = testValidator.validateGlobalConstantValue("value");
   assertEquals(
       "Valid global constant value starts with a letter char",
       FormValidation.Kind.OK,
       validation.kind);
 }
 @Test
 public void testNullConstantValue() {
   final FormValidation validation = testValidator.validateGlobalConstantValue(null);
   assertEquals(
       "Error if empty global constant value", FormValidation.Kind.ERROR, validation.kind);
 }