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A Protocol for Asynchronous Non-Blocking Data Sequence
/************************************************************************
* Licensed under Public Domain (CC0) *
* *
* To the extent possible under law, the person who associated CC0 with *
* this code has waived all copyright and related or neighboring *
* rights to this code. *
* *
* You should have received a copy of the CC0 legalcode along with this *
* work. If not, see extends WithHelperPublisher
implements SubscriberWhiteboxVerificationRules {
private final TestEnvironment env;
protected SubscriberWhiteboxVerification(TestEnvironment env) {
this.env = env;
}
// USER API
/**
* This is the main method you must implement in your test incarnation.
* It must create a new {@link org.reactivestreams.Subscriber} instance to be subjected to the testing logic.
*
* In order to be meaningfully testable your Subscriber must inform the given
* `WhiteboxSubscriberProbe` of the respective events having been received.
*/
public abstract Subscriber createSubscriber(WhiteboxSubscriberProbe probe);
// ENV SETUP
/**
* Executor service used by the default provided asynchronous Publisher.
* @see #createHelperPublisher(long)
*/
private ExecutorService publisherExecutor;
@BeforeClass public void startPublisherExecutorService() { publisherExecutor = Executors.newFixedThreadPool(4); }
@AfterClass public void shutdownPublisherExecutorService() { if (publisherExecutor != null) publisherExecutor.shutdown(); }
@Override public ExecutorService publisherExecutorService() { return publisherExecutor; }
////////////////////// TEST ENV CLEANUP /////////////////////////////////////
@BeforeMethod
public void setUp() throws Exception {
env.clearAsyncErrors();
}
////////////////////// TEST SETUP VERIFICATION //////////////////////////////
@Test
public void required_exerciseWhiteboxHappyPath() throws Throwable {
subscriberTest(new TestStageTestRun() {
@Override
public void run(WhiteboxTestStage stage) throws InterruptedException {
stage.puppet().triggerRequest(1);
stage.puppet().triggerRequest(1);
long receivedRequests = stage.expectRequest();
stage.signalNext();
stage.probe.expectNext(stage.lastT);
stage.puppet().triggerRequest(1);
if (receivedRequests == 1) {
stage.expectRequest();
}
stage.signalNext();
stage.probe.expectNext(stage.lastT);
stage.puppet().signalCancel();
stage.expectCancelling();
stage.verifyNoAsyncErrors();
}
});
}
////////////////////// SPEC RULE VERIFICATION ///////////////////////////////
// Verifies rule: https://github.com/reactive-streams/reactive-streams-jvm#2.1
@Override @Test
public void required_spec201_mustSignalDemandViaSubscriptionRequest() throws Throwable {
subscriberTest(new TestStageTestRun() {
@Override
public void run(WhiteboxTestStage stage) throws InterruptedException {
stage.puppet().triggerRequest(1);
stage.expectRequest();
stage.signalNext();
}
});
}
// Verifies rule: https://github.com/reactive-streams/reactive-streams-jvm#2.2
@Override @Test
public void untested_spec202_shouldAsynchronouslyDispatch() throws Exception {
notVerified(); // cannot be meaningfully tested, or can it?
}
// Verifies rule: https://github.com/reactive-streams/reactive-streams-jvm#2.3
@Override @Test
public void required_spec203_mustNotCallMethodsOnSubscriptionOrPublisherInOnComplete() throws Throwable {
subscriberTestWithoutSetup(new TestStageTestRun() {
@Override
public void run(WhiteboxTestStage stage) throws Throwable {
final Subscription subs = new Subscription() {
@Override
public void request(long n) {
final Optional onCompleteStackTraceElement = env.findCallerMethodInStackTrace("onComplete");
if (onCompleteStackTraceElement.isDefined()) {
final StackTraceElement stackElem = onCompleteStackTraceElement.get();
env.flop(String.format("Subscription::request MUST NOT be called from Subscriber::onComplete (Rule 2.3)! (Caller: %s::%s line %d)",
stackElem.getClassName(), stackElem.getMethodName(), stackElem.getLineNumber()));
}
}
@Override
public void cancel() {
final Optional onCompleteStackElement = env.findCallerMethodInStackTrace("onComplete");
if (onCompleteStackElement.isDefined()) {
final StackTraceElement stackElem = onCompleteStackElement.get();
env.flop(String.format("Subscription::cancel MUST NOT be called from Subscriber::onComplete (Rule 2.3)! (Caller: %s::%s line %d)",
stackElem.getClassName(), stackElem.getMethodName(), stackElem.getLineNumber()));
}
}
};
stage.probe = stage.createWhiteboxSubscriberProbe(env);
final Subscriber sub = createSubscriber(stage.probe);
sub.onSubscribe(subs);
sub.onComplete();
env.verifyNoAsyncErrorsNoDelay();
}
});
}
// Verifies rule: https://github.com/reactive-streams/reactive-streams-jvm#2.3
@Override @Test
public void required_spec203_mustNotCallMethodsOnSubscriptionOrPublisherInOnError() throws Throwable {
subscriberTestWithoutSetup(new TestStageTestRun() {
@Override
public void run(WhiteboxTestStage stage) throws Throwable {
final Subscription subs = new Subscription() {
@Override
public void request(long n) {
Throwable thr = new Throwable();
for (StackTraceElement stackElem : thr.getStackTrace()) {
if (stackElem.getMethodName().equals("onError")) {
env.flop(String.format("Subscription::request MUST NOT be called from Subscriber::onError (Rule 2.3)! (Caller: %s::%s line %d)",
stackElem.getClassName(), stackElem.getMethodName(), stackElem.getLineNumber()));
}
}
}
@Override
public void cancel() {
Throwable thr = new Throwable();
for (StackTraceElement stackElem : thr.getStackTrace()) {
if (stackElem.getMethodName().equals("onError")) {
env.flop(String.format("Subscription::cancel MUST NOT be called from Subscriber::onError (Rule 2.3)! (Caller: %s::%s line %d)",
stackElem.getClassName(), stackElem.getMethodName(), stackElem.getLineNumber()));
}
}
}
};
stage.probe = stage.createWhiteboxSubscriberProbe(env);
final Subscriber sub = createSubscriber(stage.probe);
sub.onSubscribe(subs);
sub.onError(new TestException());
env.verifyNoAsyncErrorsNoDelay();
}
});
}
// Verifies rule: https://github.com/reactive-streams/reactive-streams-jvm#2.4
@Override @Test
public void untested_spec204_mustConsiderTheSubscriptionAsCancelledInAfterRecievingOnCompleteOrOnError() throws Exception {
notVerified(); // cannot be meaningfully tested, or can it?
}
// Verifies rule: https://github.com/reactive-streams/reactive-streams-jvm#2.5
@Override @Test
public void required_spec205_mustCallSubscriptionCancelIfItAlreadyHasAnSubscriptionAndReceivesAnotherOnSubscribeSignal() throws Throwable {
subscriberTest(new TestStageTestRun() {
@Override
public void run(WhiteboxTestStage stage) throws Throwable {
// try to subscribe another time, if the subscriber calls `probe.registerOnSubscribe` the test will fail
final Latch secondSubscriptionCancelled = new Latch(env);
final Subscriber sub = stage.sub();
final Subscription subscription = new Subscription() {
@Override
public void request(long elements) {
// ignore...
}
@Override
public void cancel() {
secondSubscriptionCancelled.close();
}
@Override
public String toString() {
return "SecondSubscription(should get cancelled)";
}
};
sub.onSubscribe(subscription);
secondSubscriptionCancelled.expectClose("Expected 2nd Subscription given to subscriber to be cancelled, but `Subscription.cancel()` was not called");
env.verifyNoAsyncErrors();
}
});
}
// Verifies rule: https://github.com/reactive-streams/reactive-streams-jvm#2.6
@Override @Test
public void untested_spec206_mustCallSubscriptionCancelIfItIsNoLongerValid() throws Exception {
notVerified(); // cannot be meaningfully tested, or can it?
}
// Verifies rule: https://github.com/reactive-streams/reactive-streams-jvm#2.7
@Override @Test
public void untested_spec207_mustEnsureAllCallsOnItsSubscriptionTakePlaceFromTheSameThreadOrTakeCareOfSynchronization() throws Exception {
notVerified(); // cannot be meaningfully tested, or can it?
// the same thread part of the clause can be verified but that is not very useful, or is it?
}
// Verifies rule: https://github.com/reactive-streams/reactive-streams-jvm#2.8
@Override @Test
public void required_spec208_mustBePreparedToReceiveOnNextSignalsAfterHavingCalledSubscriptionCancel() throws Throwable {
subscriberTest(new TestStageTestRun() {
@Override
public void run(WhiteboxTestStage stage) throws InterruptedException {
stage.puppet().triggerRequest(1);
stage.puppet().signalCancel();
stage.signalNext();
stage.puppet().triggerRequest(1);
stage.puppet().triggerRequest(1);
stage.verifyNoAsyncErrors();
}
});
}
// Verifies rule: https://github.com/reactive-streams/reactive-streams-jvm#2.9
@Override @Test
public void required_spec209_mustBePreparedToReceiveAnOnCompleteSignalWithPrecedingRequestCall() throws Throwable {
subscriberTest(new TestStageTestRun() {
@Override
public void run(WhiteboxTestStage stage) throws InterruptedException {
stage.puppet().triggerRequest(1);
stage.sendCompletion();
stage.probe.expectCompletion();
stage.verifyNoAsyncErrors();
}
});
}
// Verifies rule: https://github.com/reactive-streams/reactive-streams-jvm#2.9
@Override @Test
public void required_spec209_mustBePreparedToReceiveAnOnCompleteSignalWithoutPrecedingRequestCall() throws Throwable {
subscriberTest(new TestStageTestRun() {
@Override
public void run(WhiteboxTestStage stage) throws InterruptedException {
stage.sendCompletion();
stage.probe.expectCompletion();
stage.verifyNoAsyncErrors();
}
});
}
// Verifies rule: https://github.com/reactive-streams/reactive-streams-jvm#2.10
@Override @Test
public void required_spec210_mustBePreparedToReceiveAnOnErrorSignalWithPrecedingRequestCall() throws Throwable {
subscriberTest(new TestStageTestRun() {
@Override
public void run(WhiteboxTestStage stage) throws InterruptedException {
stage.puppet().triggerRequest(1);
stage.puppet().triggerRequest(1);
Exception ex = new TestException();
stage.sendError(ex);
stage.probe.expectError(ex);
env.verifyNoAsyncErrorsNoDelay();
}
});
}
// Verifies rule: https://github.com/reactive-streams/reactive-streams-jvm#2.10
@Override @Test
public void required_spec210_mustBePreparedToReceiveAnOnErrorSignalWithoutPrecedingRequestCall() throws Throwable {
subscriberTest(new TestStageTestRun() {
@Override
public void run(WhiteboxTestStage stage) throws InterruptedException {
Exception ex = new TestException();
stage.sendError(ex);
stage.probe.expectError(ex);
env.verifyNoAsyncErrorsNoDelay();
}
});
}
// Verifies rule: https://github.com/reactive-streams/reactive-streams-jvm#2.11
@Override @Test
public void untested_spec211_mustMakeSureThatAllCallsOnItsMethodsHappenBeforeTheProcessingOfTheRespectiveEvents() throws Exception {
notVerified(); // cannot be meaningfully tested, or can it?
}
// Verifies rule: https://github.com/reactive-streams/reactive-streams-jvm#2.12
@Override @Test
public void untested_spec212_mustNotCallOnSubscribeMoreThanOnceBasedOnObjectEquality_specViolation() throws Throwable {
notVerified(); // cannot be meaningfully tested, or can it?
}
// Verifies rule: https://github.com/reactive-streams/reactive-streams-jvm#2.13
@Override @Test
public void untested_spec213_failingOnSignalInvocation() throws Exception {
notVerified(); // cannot be meaningfully tested, or can it?
}
// Verifies rule: https://github.com/reactive-streams/reactive-streams-jvm#2.13
@Override @Test
public void required_spec213_onSubscribe_mustThrowNullPointerExceptionWhenParametersAreNull() throws Throwable {
subscriberTest(new TestStageTestRun() {
@Override
public void run(WhiteboxTestStage stage) throws Throwable {
final Subscriber sub = stage.sub();
boolean gotNPE = false;
try {
sub.onSubscribe(null);
} catch (final NullPointerException expected) {
gotNPE = true;
}
assertTrue(gotNPE, "onSubscribe(null) did not throw NullPointerException");
env.verifyNoAsyncErrorsNoDelay();
}
});
}
// Verifies rule: https://github.com/reactive-streams/reactive-streams-jvm#2.13
@Override @Test
public void required_spec213_onNext_mustThrowNullPointerExceptionWhenParametersAreNull() throws Throwable {
subscriberTest(new TestStageTestRun() {
@Override
public void run(WhiteboxTestStage stage) throws Throwable {
final Subscriber sub = stage.sub();
boolean gotNPE = false;
try {
sub.onNext(null);
} catch (final NullPointerException expected) {
gotNPE = true;
}
assertTrue(gotNPE, "onNext(null) did not throw NullPointerException");
env.verifyNoAsyncErrorsNoDelay();
}
});
}
// Verifies rule: https://github.com/reactive-streams/reactive-streams-jvm#2.13
@Override @Test
public void required_spec213_onError_mustThrowNullPointerExceptionWhenParametersAreNull() throws Throwable {
subscriberTest(new TestStageTestRun() {
@Override
public void run(WhiteboxTestStage stage) throws Throwable {
final Subscriber sub = stage.sub();
boolean gotNPE = false;
try {
sub.onError(null);
} catch (final NullPointerException expected) {
gotNPE = true;
} finally {
assertTrue(gotNPE, "onError(null) did not throw NullPointerException");
}
env.verifyNoAsyncErrorsNoDelay();
}
});
}
////////////////////// SUBSCRIPTION SPEC RULE VERIFICATION //////////////////
// Verifies rule: https://github.com/reactive-streams/reactive-streams-jvm#3.1
@Override @Test
public void untested_spec301_mustNotBeCalledOutsideSubscriberContext() throws Exception {
notVerified(); // cannot be meaningfully tested, or can it?
}
// Verifies rule: https://github.com/reactive-streams/reactive-streams-jvm#3.8
@Override @Test
public void required_spec308_requestMustRegisterGivenNumberElementsToBeProduced() throws Throwable {
subscriberTest(new TestStageTestRun() {
@Override
public void run(WhiteboxTestStage stage) throws InterruptedException {
stage.puppet().triggerRequest(2);
stage.probe.expectNext(stage.signalNext());
stage.probe.expectNext(stage.signalNext());
stage.probe.expectNone();
stage.puppet().triggerRequest(3);
stage.verifyNoAsyncErrors();
}
});
}
// Verifies rule: https://github.com/reactive-streams/reactive-streams-jvm#3.10
@Override @Test
public void untested_spec310_requestMaySynchronouslyCallOnNextOnSubscriber() throws Exception {
notVerified(); // cannot be meaningfully tested, or can it?
}
// Verifies rule: https://github.com/reactive-streams/reactive-streams-jvm#3.11
@Override @Test
public void untested_spec311_requestMaySynchronouslyCallOnCompleteOrOnError() throws Exception {
notVerified(); // cannot be meaningfully tested, or can it?
}
// Verifies rule: https://github.com/reactive-streams/reactive-streams-jvm#3.14
@Override @Test
public void untested_spec314_cancelMayCauseThePublisherToShutdownIfNoOtherSubscriptionExists() throws Exception {
notVerified(); // cannot be meaningfully tested, or can it?
}
// Verifies rule: https://github.com/reactive-streams/reactive-streams-jvm#3.15
@Override @Test
public void untested_spec315_cancelMustNotThrowExceptionAndMustSignalOnError() throws Exception {
notVerified(); // cannot be meaningfully tested, or can it?
}
// Verifies rule: https://github.com/reactive-streams/reactive-streams-jvm#3.16
@Override @Test
public void untested_spec316_requestMustNotThrowExceptionAndMustOnErrorTheSubscriber() throws Exception {
notVerified(); // cannot be meaningfully tested, or can it?
}
/////////////////////// ADDITIONAL "COROLLARY" TESTS ////////////////////////
/////////////////////// TEST INFRASTRUCTURE /////////////////////////////////
abstract class TestStageTestRun {
public abstract void run(WhiteboxTestStage stage) throws Throwable;
}
/**
* Prepares subscriber and publisher pair (by subscribing the first to the latter),
* and then hands over the tests {@link WhiteboxTestStage} over to the test.
*
* The test stage is, like in a puppet show, used to orchestrate what each participant should do.
* Since this is a whitebox test, this allows the stage to completely control when and how to signal / expect signals.
*/
public void subscriberTest(TestStageTestRun body) throws Throwable {
WhiteboxTestStage stage = new WhiteboxTestStage(env, true);
body.run(stage);
}
/**
* Provides a {@link WhiteboxTestStage} without performing any additional setup,
* like the {@link #subscriberTest(SubscriberWhiteboxVerification.TestStageTestRun)} would.
*
* Use this method to write tests in which you need full control over when and how the initial {@code subscribe} is signalled.
*/
public void subscriberTestWithoutSetup(TestStageTestRun body) throws Throwable {
WhiteboxTestStage stage = new WhiteboxTestStage(env, false);
body.run(stage);
}
/**
* Test for feature that MAY be implemented. This test will be marked as SKIPPED if it fails.
*/
public void optionalSubscriberTestWithoutSetup(TestStageTestRun body) throws Throwable {
try {
subscriberTestWithoutSetup(body);
} catch (Exception ex) {
notVerified("Skipped because tested publisher does NOT implement this OPTIONAL requirement.");
}
}
public class WhiteboxTestStage extends ManualPublisher {
public Publisher pub;
public ManualSubscriber tees; // gives us access to a stream T values
public WhiteboxSubscriberProbe probe;
public T lastT = null;
public WhiteboxTestStage(TestEnvironment env) throws InterruptedException {
this(env, true);
}
public WhiteboxTestStage(TestEnvironment env, boolean runDefaultInit) throws InterruptedException {
super(env);
if (runDefaultInit) {
pub = this.createHelperPublisher(Long.MAX_VALUE);
tees = env.newManualSubscriber(pub);
probe = new WhiteboxSubscriberProbe(env, subscriber);
subscribe(createSubscriber(probe));
probe.puppet.expectCompletion(env.defaultTimeoutMillis(), String.format("Subscriber %s did not `registerOnSubscribe`", sub()));
}
}
public Subscriber sub() {
return subscriber.value();
}
public SubscriberPuppet puppet() {
return probe.puppet();
}
public WhiteboxSubscriberProbe probe() {
return probe;
}
public Publisher createHelperPublisher(long elements) {
return SubscriberWhiteboxVerification.this.createHelperPublisher(elements);
}
public WhiteboxSubscriberProbe createWhiteboxSubscriberProbe(TestEnvironment env) {
return new WhiteboxSubscriberProbe(env, subscriber);
}
public T signalNext() throws InterruptedException {
return signalNext(nextT());
}
private T signalNext(T element) throws InterruptedException {
sendNext(element);
return element;
}
public T nextT() throws InterruptedException {
lastT = tees.requestNextElement();
return lastT;
}
public void verifyNoAsyncErrors() {
env.verifyNoAsyncErrors();
}
}
/**
* This class is intented to be used as {@code Subscriber} decorator and should be used in {@code pub.subscriber(...)} calls,
* in order to allow intercepting calls on the underlying {@code Subscriber}.
* This delegation allows the proxy to implement {@link BlackboxProbe} assertions.
*/
public static class BlackboxSubscriberProxy extends BlackboxProbe implements Subscriber {
public BlackboxSubscriberProxy(TestEnvironment env, Subscriber subscriber) {
super(env, Promise.>completed(env, subscriber));
}
@Override
public void onSubscribe(Subscription s) {
sub().onSubscribe(s);
}
@Override
public void onNext(T t) {
registerOnNext(t);
sub().onNext(t);
}
@Override
public void onError(Throwable cause) {
registerOnError(cause);
sub().onError(cause);
}
@Override
public void onComplete() {
registerOnComplete();
sub().onComplete();
}
}
public static class BlackboxProbe implements SubscriberProbe {
protected final TestEnvironment env;
protected final Promise> subscriber;
protected final Receptacle elements;
protected final Promise error;
public BlackboxProbe(TestEnvironment env, Promise> subscriber) {
this.env = env;
this.subscriber = subscriber;
elements = new Receptacle(env);
error = new Promise(env);
}
@Override
public void registerOnNext(T element) {
elements.add(element);
}
@Override
public void registerOnComplete() {
try {
elements.complete();
} catch (IllegalStateException ex) {
// "Queue full", onComplete was already called
env.flop("subscriber::onComplete was called a second time, which is illegal according to Rule 1.7");
}
}
@Override
public void registerOnError(Throwable cause) {
try {
error.complete(cause);
} catch (IllegalStateException ex) {
// "Queue full", onError was already called
env.flop("subscriber::onError was called a second time, which is illegal according to Rule 1.7");
}
}
public T expectNext() throws InterruptedException {
return elements.next(env.defaultTimeoutMillis(), String.format("Subscriber %s did not call `registerOnNext(_)`", sub()));
}
public void expectNext(T expected) throws InterruptedException {
expectNext(expected, env.defaultTimeoutMillis());
}
public void expectNext(T expected, long timeoutMillis) throws InterruptedException {
T received = elements.next(timeoutMillis, String.format("Subscriber %s did not call `registerOnNext(%s)`", sub(), expected));
if (!received.equals(expected)) {
env.flop(String.format("Subscriber %s called `registerOnNext(%s)` rather than `registerOnNext(%s)`", sub(), received, expected));
}
}
public Subscriber sub() {
return subscriber.value();
}
public void expectCompletion() throws InterruptedException {
expectCompletion(env.defaultTimeoutMillis());
}
public void expectCompletion(long timeoutMillis) throws InterruptedException {
expectCompletion(timeoutMillis, String.format("Subscriber %s did not call `registerOnComplete()`", sub()));
}
public void expectCompletion(long timeoutMillis, String msg) throws InterruptedException {
elements.expectCompletion(timeoutMillis, msg);
}
@SuppressWarnings("ThrowableResultOfMethodCallIgnored")
public void expectErrorWithMessage(Class expected, String requiredMessagePart) throws InterruptedException {
final E err = expectError(expected);
String message = err.getMessage();
assertTrue(message.contains(requiredMessagePart),
String.format("Got expected exception %s but missing message [%s], was: %s", err.getClass(), requiredMessagePart, expected));
}
public E expectError(Class expected) throws InterruptedException {
return expectError(expected, env.defaultTimeoutMillis());
}
@SuppressWarnings({"unchecked", "ThrowableResultOfMethodCallIgnored"})
public E expectError(Class expected, long timeoutMillis) throws InterruptedException {
error.expectCompletion(timeoutMillis, String.format("Subscriber %s did not call `registerOnError(%s)`", sub(), expected));
if (error.value() == null) {
return env.flopAndFail(String.format("Subscriber %s did not call `registerOnError(%s)`", sub(), expected));
} else if (expected.isInstance(error.value())) {
return (E) error.value();
} else {
return env.flopAndFail(String.format("Subscriber %s called `registerOnError(%s)` rather than `registerOnError(%s)`", sub(), error.value(), expected));
}
}
public void expectError(Throwable expected) throws InterruptedException {
expectError(expected, env.defaultTimeoutMillis());
}
@SuppressWarnings("ThrowableResultOfMethodCallIgnored")
public void expectError(Throwable expected, long timeoutMillis) throws InterruptedException {
error.expectCompletion(timeoutMillis, String.format("Subscriber %s did not call `registerOnError(%s)`", sub(), expected));
if (error.value() != expected) {
env.flop(String.format("Subscriber %s called `registerOnError(%s)` rather than `registerOnError(%s)`", sub(), error.value(), expected));
}
}
public void expectNone() throws InterruptedException {
expectNone(env.defaultNoSignalsTimeoutMillis());
}
public void expectNone(long withinMillis) throws InterruptedException {
elements.expectNone(withinMillis, "Expected nothing");
}
}
public static class WhiteboxSubscriberProbe extends BlackboxProbe implements SubscriberPuppeteer {
protected Promise puppet;
public WhiteboxSubscriberProbe(TestEnvironment env, Promise> subscriber) {
super(env, subscriber);
puppet = new Promise(env);
}
private SubscriberPuppet puppet() {
return puppet.value();
}
@Override
public void registerOnSubscribe(SubscriberPuppet p) {
if (!puppet.isCompleted()) {
puppet.complete(p);
}
}
}
public interface SubscriberPuppeteer {
/**
* Must be called by the test subscriber when it has successfully registered a subscription
* inside the `onSubscribe` method.
*/
void registerOnSubscribe(SubscriberPuppet puppet);
}
public interface SubscriberProbe {
/**
* Must be called by the test subscriber when it has received an`onNext` event.
*/
void registerOnNext(T element);
/**
* Must be called by the test subscriber when it has received an `onComplete` event.
*/
void registerOnComplete();
/**
* Must be called by the test subscriber when it has received an `onError` event.
*/
void registerOnError(Throwable cause);
}
public interface SubscriberPuppet {
void triggerRequest(long elements);
void signalCancel();
}
public void notVerified() {
throw new SkipException("Not verified using this TCK.");
}
public void notVerified(String msg) {
throw new SkipException(msg);
}
}
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