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/*
* Copyright (c) 2023, 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.
*/
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.Arguments;
import org.junit.jupiter.params.provider.MethodSource;
import java.lang.reflect.AccessFlag;
import java.lang.reflect.Executable;
import java.lang.reflect.Parameter;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import java.util.stream.Stream;
import static org.junit.jupiter.api.Assertions.assertEquals;
/*
* @test
* @bug 8292275
* @summary Test required flags on parameters
* @compile RequiredMethodParameterFlagTest.java
* @run junit RequiredMethodParameterFlagTest
*/
class RequiredMethodParameterFlagTest {
private static final Set<AccessFlag> CHECKED_FLAGS = Set.of(AccessFlag.MANDATED, AccessFlag.SYNTHETIC);
static Stream<Arguments> testCases() throws ReflectiveOperationException {
Set<AccessFlag> mandated = Set.of(AccessFlag.MANDATED);
Set<AccessFlag> synthetic = Set.of(AccessFlag.SYNTHETIC);
return Stream.of(
// test for implicit parameters
// inner class
Arguments.of(Outer.Inner.class.getDeclaredConstructors()[0],
List.of(mandated, Set.of())),
// anonymous class extending an inner class
Arguments.of(Class.forName("Outer$1")
.getDeclaredConstructors()[0],
List.of(mandated, Set.of(), Set.of())),
// anonymous class
Arguments.of(Class.forName("Outer$2")
.getDeclaredConstructors()[0],
List.of(mandated)),
// enum class
Arguments.of(Outer.MyEnum.class.getDeclaredMethod("valueOf", String.class),
List.of(mandated)),
// record class
Arguments.of(Outer.MyRecord.class.getDeclaredConstructors()[0],
List.of(mandated, mandated)),
// local class
Arguments.of(Class.forName("Outer$1Task")
.getDeclaredConstructors()[0],
List.of(mandated, Set.of(), synthetic)),
// test for synthetic parameters
// assuming javac creates two synthetic parameters corresponding to
// Enum(String name, int ordinal)
Arguments.of(Outer.MyEnum.class.getDeclaredConstructors()[0],
List.of(synthetic, synthetic, Set.of(), Set.of()))
);
}
@ParameterizedTest
@MethodSource("testCases")
void check(Executable method, List<Set<AccessFlag>> paramFlags) {
Parameter[] parameters = method.getParameters();
assertEquals(paramFlags.size(), parameters.length, () -> "Parameter count of " + method);
for (int i = 0; i < parameters.length; i++) {
Set<AccessFlag> expected = new HashSet<>(paramFlags.get(i));
expected.retainAll(CHECKED_FLAGS);
Set<AccessFlag> found = new HashSet<>(parameters[i].accessFlags());
found.retainAll(CHECKED_FLAGS);
final int index = i;
assertEquals(expected, found, () -> "Parameter " + index + " in " + method);
}
}
}
// keep this in sync with test/langtools/tools/javac/RequiredParameterFlags/ImplicitParameters.java
class Outer {
class Inner {
public Inner(Inner notMandated) {}
}
Inner anonymousInner = this.new Inner(null) {};
Object anonymous = new Object() {};
private void instanceMethod(int i) {
class Task implements Runnable {
final int j;
Task(int j) {
this.j = j;
}
@Override
public void run() {
System.out.println(Outer.this.toString() + (i * j));
}
}
new Task(5).run();
}
enum MyEnum {
;
MyEnum(String s, int i) {}
}
record MyRecord(int a, Object b) {
MyRecord {}
}
}
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