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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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 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

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import java.io.FileNotFoundException;

import java.nio.ByteBuffer;

import java.nio.file.Files;

import java.nio.file.Path;

import java.nio.file.Paths;

import java.nio.file.OpenOption;

import java.util.List;

import java.util.concurrent.CompletableFuture;

import java.util.concurrent.Flow;

import java.net.http.HttpHeaders;

import java.net.http.HttpRequest.BodyPublisher;

import java.net.http.HttpResponse.BodyHandler;

import java.net.http.HttpResponse.BodySubscriber;

import org.testng.annotations.DataProvider;

import org.testng.annotations.Test;

import static java.nio.charset.StandardCharsets.UTF_8;

import static java.nio.file.StandardOpenOption.CREATE;

import static java.nio.file.StandardOpenOption.WRITE;

import static org.testng.Assert.assertThrows;

/*

 * @test

 * @summary Basic tests for API specified exceptions from Publisher, Handler,

 *          and Subscriber convenience static factory methods.

 * @run testng SubscriberPublisherAPIExceptions

 */

public class SubscriberPublisherAPIExceptions {

    static final Class<NullPointerException> NPE = NullPointerException.class;

    static final Class<IllegalArgumentException> IAE = IllegalArgumentException.class;

    static final Class<IndexOutOfBoundsException> IOB = IndexOutOfBoundsException.class;

    @Test

    public void publisherAPIExceptions() {

        assertThrows(NPE, () -> BodyPublisher.fromByteArray(null));

        assertThrows(NPE, () -> BodyPublisher.fromByteArray(null, 0, 1));

        assertThrows(IOB, () -> BodyPublisher.fromByteArray(new byte[100],    0, 101));

        assertThrows(IOB, () -> BodyPublisher.fromByteArray(new byte[100],    1, 100));

        assertThrows(IOB, () -> BodyPublisher.fromByteArray(new byte[100],   -1,  10));

        assertThrows(IOB, () -> BodyPublisher.fromByteArray(new byte[100],   99,   2));

        assertThrows(IOB, () -> BodyPublisher.fromByteArray(new byte[1],   -100,   1));

        assertThrows(NPE, () -> BodyPublisher.fromByteArrays(null));

        assertThrows(NPE, () -> BodyPublisher.fromFile(null));

        assertThrows(NPE, () -> BodyPublisher.fromInputStream(null));

        assertThrows(NPE, () -> BodyPublisher.fromString(null));

        assertThrows(NPE, () -> BodyPublisher.fromString("A", null));

        assertThrows(NPE, () -> BodyPublisher.fromString(null, UTF_8));

        assertThrows(NPE, () -> BodyPublisher.fromString(null, null));

    }

    @DataProvider(name = "nonExistentFiles")

    public Object[][] nonExistentFiles() {

        List<Path> paths = List.of(Paths.get("doesNotExist"),

                                   Paths.get("tsixEtoNseod"),

                                   Paths.get("doesNotExist2"));

        paths.forEach(p -> {

            if (Files.exists(p))

                throw new AssertionError("Unexpected " + p);

        });

        return paths.stream().map(p -> new Object[] { p }).toArray(Object[][]::new);

    }

    @Test(dataProvider = "nonExistentFiles", expectedExceptions = FileNotFoundException.class)

    public void fromFileCheck(Path path) throws Exception {

        BodyPublisher.fromFile(path);

    }

    @Test

    public void handlerAPIExceptions() {

        Path path = Paths.get(".").resolve("tt");

        assertThrows(NPE, () -> BodyHandler.asByteArrayConsumer(null));

        assertThrows(NPE, () -> BodyHandler.asFile(null));

        assertThrows(NPE, () -> BodyHandler.asFile(null, CREATE, WRITE));

        assertThrows(NPE, () -> BodyHandler.asFile(path, (OpenOption[])null));

        assertThrows(NPE, () -> BodyHandler.asFile(path, new OpenOption[] {null}));

        assertThrows(NPE, () -> BodyHandler.asFile(path, new OpenOption[] {CREATE, null}));

        assertThrows(NPE, () -> BodyHandler.asFile(path, new OpenOption[] {null, CREATE}));

        assertThrows(NPE, () -> BodyHandler.asFile(null, (OpenOption[])null));

        assertThrows(NPE, () -> BodyHandler.asFileDownload(null, CREATE, WRITE));

        assertThrows(NPE, () -> BodyHandler.asFileDownload(path, (OpenOption[])null));

        assertThrows(NPE, () -> BodyHandler.asFileDownload(path, new OpenOption[] {null}));

        assertThrows(NPE, () -> BodyHandler.asFileDownload(path, new OpenOption[] {CREATE, null}));

        assertThrows(NPE, () -> BodyHandler.asFileDownload(path, new OpenOption[] {null, CREATE}));

        assertThrows(NPE, () -> BodyHandler.asFileDownload(null, (OpenOption[])null));

        assertThrows(NPE, () -> BodyHandler.asString(null));

        assertThrows(NPE, () -> BodyHandler.buffering(null, 1));

        assertThrows(IAE, () -> BodyHandler.buffering(new NoOpHandler(), 0));

        assertThrows(IAE, () -> BodyHandler.buffering(new NoOpHandler(), -1));

        assertThrows(IAE, () -> BodyHandler.buffering(new NoOpHandler(), Integer.MIN_VALUE));

    }

    @Test

    public void subscriberAPIExceptions() {

        Path path = Paths.get(".").resolve("tt");

        assertThrows(NPE, () -> BodySubscriber.asByteArrayConsumer(null));

        assertThrows(NPE, () -> BodySubscriber.asFile(null));

        assertThrows(NPE, () -> BodySubscriber.asFile(null, CREATE, WRITE));

        assertThrows(NPE, () -> BodySubscriber.asFile(path, (OpenOption[])null));

        assertThrows(NPE, () -> BodySubscriber.asFile(path, new OpenOption[] {null}));

        assertThrows(NPE, () -> BodySubscriber.asFile(path, new OpenOption[] {CREATE, null}));

        assertThrows(NPE, () -> BodySubscriber.asFile(path, new OpenOption[] {null, CREATE}));

        assertThrows(NPE, () -> BodySubscriber.asFile(null, (OpenOption[])null));

        assertThrows(NPE, () -> BodySubscriber.asString(null));

        assertThrows(NPE, () -> BodySubscriber.buffering(null, 1));

        assertThrows(IAE, () -> BodySubscriber.buffering(new NoOpSubscriber(), 0));

        assertThrows(IAE, () -> BodySubscriber.buffering(new NoOpSubscriber(), -1));

        assertThrows(IAE, () -> BodySubscriber.buffering(new NoOpSubscriber(), Integer.MIN_VALUE));

    }

    static class NoOpHandler implements BodyHandler<Void> {

        @Override public BodySubscriber<Void> apply(int code, HttpHeaders hrds) { return null; }

    }

    static class NoOpSubscriber implements BodySubscriber<Void> {

        @Override public void onSubscribe(Flow.Subscription subscription) { }

        @Override public void onNext(List<ByteBuffer> item) { }

        @Override public void onError(Throwable throwable) { }

        @Override public void onComplete() { }

        @Override public CompletableFuture<Void> getBody() { return null; }

    }

}