--- /dev/null 2019-04-04 13:18:59.860000000 -0700 +++ new/test/langtools/tools/javac/processing/model/element/TestElementKindPredicates.java 2019-04-12 14:31:50.580473729 -0700 @@ -0,0 +1,74 @@ +/* + * Copyright (c) 2019, Oracle and/or its affiliates. All rights reserved. + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * This code is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 only, as + * published by the Free Software Foundation. + * + * This code is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License + * version 2 for more details (a copy is included in the LICENSE file that + * accompanied this code). + * + * You should have received a copy of the GNU General Public License version + * 2 along with this work; if not, write to the Free Software Foundation, + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. + * + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA + * or visit www.oracle.com if you need additional information or have any + * questions. + */ + +/* + * @test + * @bug 8222430 + * @summary Test various predicates of ElementKind. + */ + +import java.util.Set; +import java.util.function.Predicate; +import javax.lang.model.element.ElementKind; + +/** + * Test the isClass, isField, and isInterface predicates of ElementKind. + */ +public class TestElementKindPredicates { + public static void main(String... args) { + Set ALL_KINDS = Set.of(ElementKind.values()); + + // isClass: Returns true if this is a kind of class: either CLASS or ENUM. + test(ALL_KINDS, + (ElementKind k) -> Set.of(ElementKind.CLASS, + ElementKind.ENUM).contains(k), + (ElementKind k) -> k.isClass(), "isClass"); + + // isField: Returns true if this is a kind of field: either FIELD or ENUM_CONSTANT. + test(ALL_KINDS, + (ElementKind k) -> Set.of(ElementKind.FIELD, + ElementKind.ENUM_CONSTANT).contains(k), + (ElementKind k) -> k.isField(), "isField"); + + // isInterface: Returns true if this is a kind of interface: either INTERFACE or ANNOTATION_TYPE. + test(ALL_KINDS, + (ElementKind k) -> Set.of(ElementKind.INTERFACE, + ElementKind.ANNOTATION_TYPE).contains(k), + (ElementKind k) -> k.isInterface(), "isInterface"); + } + + private static void test(Set kinds, + Predicate expectedPred, + Predicate actualPred, + String errorMessage) { + for(ElementKind kind : kinds) { + boolean expected = expectedPred.test(kind); + boolean actual = actualPred.test(kind); + + if (expected != actual) { + throw new RuntimeException("Error testing ElementKind." + errorMessage + "(" + kind + + "):\texpected " + expected + "\tgot " + actual); + } + } + } +}