/*
 * Copyright (C) 2015-2018 Lightbend Inc. <https://www.lightbend.com>
 */

package akka.stream.javadsl;

import akka.util.ByteString;
import akka.stream.StreamTest;
import akka.testkit.AkkaJUnitActorSystemResource;
import akka.testkit.AkkaSpec;
import org.junit.ClassRule;
import org.junit.Test;

import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.CompletionStage;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;

import static org.junit.Assert.assertEquals;

public class JsonFramingTest extends StreamTest {
    public JsonFramingTest() {
        super(actorSystemResource);
    }

    @ClassRule
    public static AkkaJUnitActorSystemResource actorSystemResource =
            new AkkaJUnitActorSystemResource("JsonFramingTest", AkkaSpec.testConf());

    @Test
    public void mustBeAbleToParseJsonArray() throws InterruptedException, ExecutionException, TimeoutException {
        // #using-json-framing
        String input = "[{ \"name\" : \"john\" }, { \"name\" : \"Ég get etið gler án þess að meiða mig\" }, { \"name\" : \"jack\" }]";
        CompletionStage<ArrayList<String>> result = Source.single(ByteString.fromString(input))
                .via(JsonFraming.objectScanner(Integer.MAX_VALUE))
                .runFold(new ArrayList<String>(), (acc, entry) -> {
                    acc.add(entry.utf8String());
                    return acc;
                }, materializer);
        // #using-json-framing

        List<String> frames = result.toCompletableFuture().get(5, TimeUnit.SECONDS);
        assertEquals("{ \"name\" : \"john\" }", frames.get(0));
        assertEquals("{ \"name\" : \"Ég get etið gler án þess að meiða mig\" }", frames.get(1));
        assertEquals("{ \"name\" : \"jack\" }", frames.get(2));
    }
}
