jdk/test/jdk/java/net/httpclient/ThrowingSubscribersAsLimiting.java

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/*
 * @test
 * @summary Verifies the behavior of `limiting()` on unexpected exceptions
 *          thrown at various places (`onSubscriber()`, `onNext()`, etc.) when
 *          the request is performed _synchronously_ using `HttpClient::send`.
 *          Even though throwing exceptions at such points is against the
 *          Reactive Streams contract, we make sure that `HttpClient` gets its
 *          resources released on such misbehaving user code.
 * @library /test/jdk/java/net/httpclient/lib
 *          /test/lib
 * @build AbstractThrowingSubscribers
 *        ReferenceTracker
 *        jdk.httpclient.test.lib.common.HttpServerAdapters
 *        jdk.test.lib.net.SimpleSSLContext
 * @run testng/othervm -Djdk.internal.httpclient.debug=true ThrowingSubscribersAsLimiting
 */

import org.testng.annotations.Test;

import java.net.http.HttpResponse;
import java.util.function.Supplier;
import java.util.stream.Stream;

public class ThrowingSubscribersAsLimiting extends AbstractThrowingSubscribers {

    @Test(dataProvider = "variants")
    public void test(String uri, boolean sameClient, Thrower thrower) throws Exception {
        test(uri, sameClient, thrower, false);
    }

    void test(String uri, boolean sameClient, Thrower thrower, boolean async) throws Exception {
        uri = uri + "-" + URICOUNT.incrementAndGet();
        String name = String.format(
                "testThrowingAsLimiting%s(%s, %b, %s)",
                (async ? "Async" : ""), uri, sameClient, thrower);
        Supplier<HttpResponse.BodyHandler<Stream<String>>> handlerSupplier =
                () -> HttpResponse.BodyHandlers.limiting(
                        HttpResponse.BodyHandlers.ofLines(),
                        Long.MAX_VALUE);
        testThrowing(
                name,
                uri,
                sameClient,
                handlerSupplier,
                this::finish,
                thrower,
                async,
                excludes(SubscriberType.OFFLINE));
    }

    private Void finish(Where where, HttpResponse<Stream<String>> response, Thrower thrower) {
        switch (where) {
            case BODY_HANDLER:
            case GET_BODY:
            case BODY_CF:
                return shouldHaveThrown(where, response, thrower);
        }
        try {
            // noinspection ResultOfMethodCallIgnored
            response.body().toList();
        } catch (Error | Exception throwable) {
            Throwable cause = findCause(throwable, thrower);
            if (cause != null) {
                System.out.println(now() + "Got expected exception in " + where + ": " + cause);
                return null;
            }
            throw causeNotFound(where, throwable);
        }
        return shouldHaveThrown(where, response, thrower);
    }

}