package org.eclipse.aether.internal.impl.collect;

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

import org.eclipse.aether.DefaultRepositorySystemSession;
import org.eclipse.aether.artifact.DefaultArtifact;
import org.eclipse.aether.graph.Dependency;
import org.eclipse.aether.internal.test.util.TestVersion;
import org.eclipse.aether.resolution.VersionRangeRequest;
import org.eclipse.aether.resolution.VersionRangeResult;
import org.eclipse.aether.version.Version;
import org.junit.Test;

import java.util.Arrays;
import java.util.Collections;
import java.util.Iterator;
import java.util.NoSuchElementException;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;

public class DefaultVersionFilterContextTest
{
    private static final Dependency FOO_DEPENDENCY = new Dependency( new DefaultArtifact( "group-id:foo:1.0" ), "test" );
    private static final Dependency BAR_DEPENDENCY = new Dependency( new DefaultArtifact( "group-id:bar:1.0" ), "test" );

    @Test
    public void iteratorOneItem()
    {
        DefaultVersionFilterContext context = new DefaultVersionFilterContext( new DefaultRepositorySystemSession() );
        VersionRangeResult result = new VersionRangeResult( new VersionRangeRequest() );
        result.addVersion( new TestVersion( "1.0" ) );
        context.set( FOO_DEPENDENCY, result );

        Iterator<Version> iterator = context.iterator();
        assertTrue( iterator.hasNext() );
        assertEquals( new TestVersion( "1.0" ), iterator.next() );
    }

    @Test
    public void getCountOneItem()
    {
        DefaultVersionFilterContext context = new DefaultVersionFilterContext( new DefaultRepositorySystemSession() );
        VersionRangeResult result = new VersionRangeResult( new VersionRangeRequest() );
        result.addVersion( new TestVersion( "1.0" ) );
        context.set( FOO_DEPENDENCY, result );

        assertEquals(1, context.getCount());
    }

    @Test
    public void getOneItem()
    {
        DefaultVersionFilterContext context = new DefaultVersionFilterContext( new DefaultRepositorySystemSession() );
        VersionRangeResult result = new VersionRangeResult( new VersionRangeRequest() );
        result.addVersion( new TestVersion( "1.0" ) );
        context.set( FOO_DEPENDENCY, result );

        assertEquals( Collections.singletonList( new TestVersion( "1.0") ), context.get() );
    }

    @Test
    public void iteratorDelete()
    {
        DefaultVersionFilterContext context = new DefaultVersionFilterContext( new DefaultRepositorySystemSession() );
        VersionRangeResult result = new VersionRangeResult( new VersionRangeRequest() );
        result.addVersion( new TestVersion( "1.0" ) );
        context.set( FOO_DEPENDENCY, result );

        Iterator<Version> iterator = context.iterator();
        iterator.next();
        iterator.remove();

        assertEquals( 0, context.getCount() );
    }

    @Test(expected = NoSuchElementException.class)
    public void nextBeyondEnd()
    {
        DefaultVersionFilterContext context = new DefaultVersionFilterContext( new DefaultRepositorySystemSession() );
        VersionRangeResult result = new VersionRangeResult( new VersionRangeRequest() );
        result.addVersion( new TestVersion( "1.0" ) );
        context.set( FOO_DEPENDENCY, result );

        Iterator<Version> iterator = context.iterator();
        iterator.next();
        iterator.next();
    }

    @Test
    public void removeOneOfOne()
    {
        DefaultVersionFilterContext context = new DefaultVersionFilterContext( new DefaultRepositorySystemSession() );
        VersionRangeResult result = new VersionRangeResult( new VersionRangeRequest() );
        result.addVersion( new TestVersion( "1.0" ) );
        context.set( FOO_DEPENDENCY, result );

        Iterator<Version> iterator = context.iterator();
        iterator.next();
        iterator.remove();

        assertEquals( Collections.emptyList(), context.get() );
    }

    @Test
    public void removeOneOfTwo()
    {
        DefaultVersionFilterContext context = new DefaultVersionFilterContext( new DefaultRepositorySystemSession() );
        VersionRangeResult result = new VersionRangeResult( new VersionRangeRequest() );
        result.addVersion( new TestVersion( "1.0" ) );
        result.addVersion( new TestVersion( "2.0" ) );
        context.set( FOO_DEPENDENCY, result );

        Iterator<Version> iterator = context.iterator();
        iterator.next();
        iterator.remove();

        assertEquals( Collections.singletonList( new TestVersion( "2.0") ), context.get() );
    }

    @Test
    public void removeOneOfThree()
    {
        DefaultVersionFilterContext context = new DefaultVersionFilterContext( new DefaultRepositorySystemSession() );
        VersionRangeResult result = new VersionRangeResult( new VersionRangeRequest() );
        result.addVersion( new TestVersion( "1.0" ) );
        result.addVersion( new TestVersion( "2.0" ) );
        result.addVersion( new TestVersion( "3.0" ) );
        context.set( FOO_DEPENDENCY, result );

        Iterator<Version> iterator = context.iterator();
        iterator.next();
        iterator.remove();

        assertEquals( Arrays.asList( new TestVersion( "2.0" ), new TestVersion( "3.0" ) ), context.get() );
    }

    @Test
    public void setTwice()
    {
        DefaultVersionFilterContext context = new DefaultVersionFilterContext( new DefaultRepositorySystemSession() );
        VersionRangeResult fooResult = new VersionRangeResult( new VersionRangeRequest() );
        fooResult.addVersion( new TestVersion( "1.0" ) );
        context.set( FOO_DEPENDENCY, fooResult );

        VersionRangeResult barResult = new VersionRangeResult( new VersionRangeRequest() );
        barResult.addVersion( new TestVersion( "1.0" ) );
        barResult.addVersion( new TestVersion( "2.0" ) );
        context.set( BAR_DEPENDENCY, barResult );

        assertEquals( Arrays.asList( new TestVersion( "1.0" ), new TestVersion( "2.0" ) ), context.get() );
    }
}