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/*
* Copyright (c) 2016, 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
* @run testng DropLookupModeTest
* @summary Basic unit tests Lookup::dropLookupMode
*/
import java.lang.invoke.MethodHandles;
import java.lang.invoke.MethodHandles.Lookup;
import static java.lang.invoke.MethodHandles.Lookup.*;
import org.testng.annotations.DataProvider;
import org.testng.annotations.Test;
import static org.testng.Assert.*;
@Test
public class DropLookupModeTest {
/**
* Basic test of dropLookupMode
*/
public void testBasic() {
final Lookup fullPowerLookup = MethodHandles.lookup();
final Class<?> lc = fullPowerLookup.lookupClass();
assertTrue(fullPowerLookup.lookupModes() == (PUBLIC|MODULE|PACKAGE|PROTECTED|PRIVATE));
Lookup lookup = fullPowerLookup.dropLookupMode(PRIVATE);
assertTrue(lookup.lookupClass() == lc);
assertTrue(lookup.lookupModes() == (PUBLIC|MODULE|PACKAGE));
lookup = fullPowerLookup.dropLookupMode(PROTECTED);
assertTrue(lookup.lookupClass() == lc);
assertTrue(lookup.lookupModes() == (PUBLIC|MODULE|PACKAGE|PRIVATE));
lookup = fullPowerLookup.dropLookupMode(PACKAGE);
assertTrue(lookup.lookupClass() == lc);
assertTrue(lookup.lookupModes() == (PUBLIC|MODULE));
lookup = fullPowerLookup.dropLookupMode(MODULE);
assertTrue(lookup.lookupClass() == lc);
assertTrue(lookup.lookupModes() == (PUBLIC));
lookup = fullPowerLookup.dropLookupMode(PUBLIC);
assertTrue(lookup.lookupClass() == lc);
assertTrue(lookup.lookupModes() == 0);
lookup = fullPowerLookup.dropLookupMode(UNCONDITIONAL);
assertTrue(lookup.lookupClass() == lc);
assertTrue(lookup.lookupModes() == (PUBLIC|MODULE|PACKAGE|PRIVATE));
}
/**
* Starting with a full power Lookup, use dropLookupMode to create new Lookups
* with reduced access.
*/
public void testReducingAccess() {
Lookup lookup = MethodHandles.lookup();
final Class<?> lc = lookup.lookupClass();
assertTrue(lookup.lookupModes() == (PUBLIC|MODULE|PACKAGE|PROTECTED|PRIVATE));
lookup = lookup.dropLookupMode(PROTECTED);
assertTrue(lookup.lookupClass() == lc);
assertTrue(lookup.lookupModes() == (PUBLIC|MODULE|PACKAGE|PRIVATE));
lookup = lookup.dropLookupMode(PRIVATE);
assertTrue(lookup.lookupClass() == lc);
assertTrue(lookup.lookupModes() == (PUBLIC|MODULE|PACKAGE));
lookup = lookup.dropLookupMode(PACKAGE);
assertTrue(lookup.lookupClass() == lc);
assertTrue(lookup.lookupModes() == (PUBLIC|MODULE));
lookup = lookup.dropLookupMode(MODULE);
assertTrue(lookup.lookupClass() == lc);
assertTrue(lookup.lookupModes() == PUBLIC);
lookup = lookup.dropLookupMode(PUBLIC);
assertTrue(lookup.lookupClass() == lc);
assertTrue(lookup.lookupModes() == 0);
// repeat with lookup has no access
lookup = lookup.dropLookupMode(PUBLIC);
assertTrue(lookup.lookupClass() == lc);
assertTrue(lookup.lookupModes() == 0);
}
/**
* Test dropLookupMode on the public Lookup.
*/
public void testPublicLookup() {
final Lookup publicLookup = MethodHandles.publicLookup();
final Class<?> lc = publicLookup.lookupClass();
assertTrue(publicLookup.lookupModes() == (PUBLIC|UNCONDITIONAL));
Lookup lookup = publicLookup.dropLookupMode(PRIVATE);
assertTrue(lookup.lookupClass() == lc);
assertTrue(lookup.lookupModes() == PUBLIC);
lookup = publicLookup.dropLookupMode(PROTECTED);
assertTrue(lookup.lookupClass() == lc);
assertTrue(lookup.lookupModes() == PUBLIC);
lookup = publicLookup.dropLookupMode(PACKAGE);
assertTrue(lookup.lookupClass() == lc);
assertTrue(lookup.lookupModes() == PUBLIC);
lookup = publicLookup.dropLookupMode(MODULE);
assertTrue(lookup.lookupClass() == lc);
assertTrue(lookup.lookupModes() == PUBLIC);
lookup = publicLookup.dropLookupMode(PUBLIC);
assertTrue(lookup.lookupClass() == lc);
assertTrue(lookup.lookupModes() == 0);
lookup = publicLookup.dropLookupMode(UNCONDITIONAL);
assertTrue(lookup.lookupClass() == lc);
assertTrue(lookup.lookupModes() == PUBLIC);
}
@DataProvider(name = "badInput")
public Object[][] badInput() {
return new Object[][] {
{ 0, null },
{ (PACKAGE|PRIVATE), null }, // two modes
{ Integer.MAX_VALUE, null },
{ Integer.MIN_VALUE, null },
};
}
/**
* Check that IllegalArgumentException is thrown for bad input
*/
@Test(dataProvider = "badInput", expectedExceptions = {IllegalArgumentException.class})
public void testBadInput(Integer modeToDrop, Object ignore) {
MethodHandles.lookup().dropLookupMode(modeToDrop);
}
}
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