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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

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 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

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 * 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

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 *

 * 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,

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 */

/**

 * @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);

    }

    /**

     * 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);

        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);

    }

    @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);

    }

}