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 * 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.

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/**

 * @test

 * @run testng ModuleReferenceTest

 * @summary Basic tests for java.lang.module.ModuleReference

 */

import java.lang.module.ModuleDescriptor;

import java.lang.module.ModuleReader;

import java.lang.module.ModuleReference;

import java.net.URI;

import java.util.function.Supplier;

import org.testng.annotations.Test;

import static org.testng.Assert.*;

@Test

public class ModuleReferenceTest {

    private Supplier<ModuleReader> makeSupplier() {

        return () -> { throw new UnsupportedOperationException(); };

    }

    public void testBasic() throws Exception {

        ModuleDescriptor descriptor

                .exports("p")

                .exports("q")

                .build();

        URI uri = URI.create("module:/m");

        Supplier<ModuleReader> supplier = makeSupplier();

        ModuleReference mref = new ModuleReference(descriptor, uri, supplier);

        assertTrue(mref.descriptor().equals(descriptor));

        assertTrue(mref.location().get().equals(uri));

        // check that the supplier is called

        try {

            mref.open();

            assertTrue(false);

        } catch (UnsupportedOperationException expected) { }

    }

    @Test(expectedExceptions = { NullPointerException.class })

    public void testNullDescriptor() throws Exception {

        URI location = URI.create("module:/m");

        new ModuleReference(null, location, makeSupplier());

    }

    public void testNullLocation() {

        ModuleDescriptor descriptor

                .exports("p")

                .build();

        Supplier<ModuleReader> supplier = makeSupplier();

        ModuleReference mref = new ModuleReference(descriptor, null, supplier);

        assertTrue(!mref.location().isPresent());

    }

    @Test(expectedExceptions = { NullPointerException.class })

    public void testNullSupplier() throws Exception {

        URI location = URI.create("module:/m");

        new ModuleReference(descriptor, location, null);

    }

    public void testEqualsAndHashCode() {

        ModuleDescriptor descriptor1

                .exports("p")

                .build();

        ModuleDescriptor descriptor2

                .exports("p")

                .build();

        URI uri = URI.create("module:/m1");

        Supplier<ModuleReader> supplier = makeSupplier();

        ModuleReference mref1 = new ModuleReference(descriptor1, uri, supplier);

        ModuleReference mref2 = new ModuleReference(descriptor2, uri, supplier);

        ModuleReference mref3 = new ModuleReference(descriptor1, null, supplier);

        assertTrue(mref1.equals(mref1));

        assertTrue(mref1.equals(mref2));

        assertTrue(mref2.equals(mref1));

        assertTrue(mref1.hashCode() == mref2.hashCode());

        assertTrue(mref3.equals(mref3));

        assertFalse(mref3.equals(mref1));

        assertFalse(mref1.equals(mref3));

    }

    public void testToString() {

        URI uri = URI.create("module:/m1");

        Supplier<ModuleReader> supplier = makeSupplier();

        ModuleReference mref = new ModuleReference(descriptor, uri, supplier);

        String s = mref.toString();

        assertTrue(s.contains("m1"));

        assertTrue(s.contains(uri.toString()));

    }

}