# NameableAssert.java

    /*
     * Copyright 2008 Michael Hunger.
     *
     * Licensed  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.
     */
    package org.qi4j.test.indexing;

    import java.util.ArrayList;
    import java.util.Arrays;
    import java.util.Collections;
    import java.util.HashMap;
    import java.util.List;
    import java.util.Map;
    import org.qi4j.api.entity.EntityReference;
    import org.qi4j.api.entity.Identity;
    import org.qi4j.test.indexing.model.Nameable;

    import static org.hamcrest.core.IsEqual.equalTo;
    import static org.hamcrest.core.IsNull.notNullValue;
    import static org.junit.Assert.assertThat;
    import static org.junit.Assert.fail;
    import static org.qi4j.functional.Iterables.toList;

    public class NameableAssert
    {
        // id -> name
        private static final Map<String, String> world = new HashMap<>();

        public static void clear()
        {
            world.clear();
        }

        public static void assertNames( Iterable<EntityReference> identitiesIterable, String... expectedNames )
        {
            assertNames( true, identitiesIterable, expectedNames );
        }

        public static void assertNames( boolean sort,
                                        Iterable<EntityReference> identitiesIterable,
                                        String... expectedNames
        )
        {
            final List<EntityReference> references = toList( identitiesIterable );
            assertThat( expectedNames.length + " entries(" + expectedNames.length + ", got " + getNames( references ) + ")",
                        references.size(),
                        equalTo( expectedNames.length ) );
            List<String> sortedNames = getNames( references );
            final List<String> expectedSorted = java.util.Arrays.asList( expectedNames );
            if( sort )
            {
                Collections.sort( sortedNames );
                Collections.sort( expectedSorted );
            }
            assertThat( "names", sortedNames, equalTo( expectedSorted ) );
        }

        public static void trace( Nameable nameable )
        {
            world.put( ( (Identity) nameable ).identity().get(), nameable.name().get() );
        }

        public static void assertName( String expectedName, EntityReference reference )
        {
            final String existingName = getName( reference );
            assertThat( "Name of " + reference, existingName, equalTo( expectedName ) );
        }

        public static String getName( EntityReference reference )
        {
            return world.get( reference.identity() );
        }

        public static List<String> getNames( List<EntityReference> references )
        {
            List<String> result = new ArrayList<>( references.size() );
            for( EntityReference reference : references )
            {
                final String name = getName( reference );
                assertThat( "Name of " + reference, name, notNullValue() );
                result.add( name );
            }
            return result;
        }

        public static String[] allNames()
        {
            return world.values().toArray( new String[ world.size() ] );
        }

        public static void verifyUnorderedResults( final Iterable<? extends Nameable> results, final String... names )
        {
            List<String> expected = new ArrayList<>( Arrays.asList( names ) );
            List<String> unexpected = new ArrayList<>();
            for( Nameable result : results )
            {
                String name = result.name().get();
                if( !expected.remove( name ) )
                {
                    unexpected.add( name );
                }
            }
            if( !unexpected.isEmpty() || !expected.isEmpty() )
            {
                String message = "";
                if( !unexpected.isEmpty() )
                {
                    message += unexpected + " returned but not expected\n";
                }
                if( !expected.isEmpty() )
                {
                    message += expected + " expected but not returned\n";
                }
                fail( message.substring( 0, message.length() - 1 ) );
            }
        }

        public static void verifyOrderedResults( final Iterable<? extends Nameable> results, final String... names )
        {
            List<String> expected = new ArrayList<>( Arrays.asList( names ) );
            List<String> actual = new ArrayList<>();
            for( Nameable result : results )
            {
                actual.add( result.name().get() );
            }

            assertThat( "Result is incorrect", actual, equalTo( expected ) );
        }

        private NameableAssert()
        {
        }
    }