java.lang.Object
- rx.Subscriber<T>
- - rx.observers.TestSubscriber<T>

Type Parameters:

T - the value type

All Implemented Interfaces:

Observer<T>, Subscription
```
public class TestSubscriber<T>
extends Subscriber<T>
```
A TestSubscriber is a variety of Subscriber that you can use for unit testing, to perform assertions, inspect received events, or wrap a mocked Subscriber.

Field Summary

Fields
Modifier and Type	Field	Description
`private int`	`completions`	The number of onCompleted() calls.
`private Observer<T>`	`delegate`
`private java.util.List<java.lang.Throwable>`	`errors`
`private static Observer<java.lang.Object>`	`INERT`	The shared no-op observer.
`private java.lang.Thread`	`lastSeenThread`
`private java.util.concurrent.CountDownLatch`	`latch`
`private int`	`valueCount`	Written after an onNext value has been added to the `values` list.
`private java.util.List<T>`	`values`

Constructor Summary

Constructors
Constructor	Description
`TestSubscriber()`	Constructs a TestSubscriber with an initial request of Long.MAX_VALUE and no delegation.
`TestSubscriber(long initialRequest)`	Constructs a TestSubscriber with the initial request to be requested from upstream.
`TestSubscriber(Observer<T> delegate)`	Constructs a TestSubscriber which requests Long.MAX_VALUE and delegates events to the given Observer.
`TestSubscriber(Observer<T> delegate, long initialRequest)`	Constructs a TestSubscriber with the initial request to be requested from upstream and a delegate Observer to wrap.
`TestSubscriber(Subscriber<T> delegate)`	Constructs a TestSubscriber which requests Long.MAX_VALUE and delegates events to the given Subscriber.

Method Summary

All Methods Static Methods Instance Methods Concrete Methods Deprecated Methods
Modifier and Type	Method	Description
`void`	`assertCompleted()`	Asserts that there is exactly one completion event.
`void`	`assertError(java.lang.Class<? extends java.lang.Throwable> clazz)`	Asserts that there is exactly one error event which is a subclass of the given class.
`void`	`assertError(java.lang.Throwable throwable)`	Asserts that there is a single onError event with the exact exception.
`(package private) void`	`assertionError(java.lang.String message)`	Combines an assertion error message with the current completion and error state of this TestSubscriber, giving more information when some assertXXX check fails.
`void`	`assertNoErrors()`	Asserts that this `Subscriber` has received no `onError` notifications.
`void`	`assertNotCompleted()`	Asserts that there is no completion event.
`void`	`assertNoTerminalEvent()`	Asserts that there are no onError and onCompleted events.
`void`	`assertNoValues()`	Asserts that there are no onNext events received.
`void`	`assertReceivedOnNext(java.util.List<T> items)`	Asserts that a particular sequence of items was received by this `Subscriber` in order.
`void`	`assertTerminalEvent()`	Asserts that a single terminal event occurred, either `onCompleted()` or `onError(java.lang.Throwable)`.
`void`	`assertUnsubscribed()`	Asserts that this `Subscriber` is unsubscribed.
`void`	`assertValue(T value)`	Asserts that there is only a single received onNext event and that it marks the emission of a specific item.
`void`	`assertValueCount(int count)`	Asserts that the given number of onNext events are received.
`void`	`assertValues(T... values)`	Asserts that the received onNext events, in order, are the specified items.
`void`	`awaitTerminalEvent()`	Blocks until this `Subscriber` receives a notification that the `Observable` is complete (either an `onCompleted` or `onError` notification).
`void`	`awaitTerminalEvent(long timeout, java.util.concurrent.TimeUnit unit)`	Blocks until this `Subscriber` receives a notification that the `Observable` is complete (either an `onCompleted` or `onError` notification), or until a timeout expires.
`void`	`awaitTerminalEventAndUnsubscribeOnTimeout(long timeout, java.util.concurrent.TimeUnit unit)`	Blocks until this `Subscriber` receives a notification that the `Observable` is complete (either an `onCompleted` or `onError` notification), or until a timeout expires; if the Subscriber is interrupted before either of these events take place, this method unsubscribes the Subscriber from the Observable).
`boolean`	`awaitValueCount(int expected, long timeout, java.util.concurrent.TimeUnit unit)`	Wait until the current committed value count is less than the expected amount by sleeping 1 unit at most timeout times and return true if at least the required amount of onNext values have been received.
`static <T> TestSubscriber<T>`	`create()`	Factory method to construct a TestSubscriber with an initial request of Long.MAX_VALUE and no delegation.
`static <T> TestSubscriber<T>`	`create(long initialRequest)`	Factory method to construct a TestSubscriber with the given initial request amount and no delegation.
`static <T> TestSubscriber<T>`	`create(Observer<T> delegate)`	Factory method to construct a TestSubscriber which delegates events to the given Observer and an issues an initial request of Long.MAX_VALUE.
`static <T> TestSubscriber<T>`	`create(Observer<T> delegate, long initialRequest)`	Factory method to construct a TestSubscriber which delegates events to the given Observer and issues the given initial request amount.
`static <T> TestSubscriber<T>`	`create(Subscriber<T> delegate)`	Factory method to construct a TestSubscriber which delegates events to the given Subscriber and an issues an initial request of Long.MAX_VALUE.
`int`	`getCompletions()`	Returns the number of times onCompleted was called on this TestSubscriber.
`java.lang.Thread`	`getLastSeenThread()`	Returns the last thread that was in use when an item or notification was received by this `Subscriber`.
`java.util.List<Notification<T>>`	`getOnCompletedEvents()`	Deprecated. use `getCompletions()` instead.
`java.util.List<java.lang.Throwable>`	`getOnErrorEvents()`	Returns the `Throwable`s this `Subscriber` was notified of via `onError(java.lang.Throwable)` as a `List`.
`java.util.List<T>`	`getOnNextEvents()`	Returns the sequence of items observed by this `Subscriber`, as an ordered `List`.
`int`	`getValueCount()`	Returns the committed number of onNext elements that are safe to be read from `getOnNextEvents()` other threads.
`void`	`onCompleted()`	Notifies the Subscriber that the `Observable` has finished sending push-based notifications.
`void`	`onError(java.lang.Throwable e)`	Notifies the Subscriber that the `Observable` has experienced an error condition.
`void`	`onNext(T t)`	Provides the Subscriber with a new item to observe.
`void`	`requestMore(long n)`	Allows calling the protected `Subscriber.request(long)` from unit tests.

Methods inherited from class rx.Subscriber
add, isUnsubscribed, onStart, request, setProducer, unsubscribe

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - delegate
```
private final Observer<T> delegate
```
  - values
```
private final java.util.List<T> values
```
  - errors
```
private final java.util.List<java.lang.Throwable> errors
```
  - completions
```
private int completions
```
    The number of onCompleted() calls.
  - latch
```
private final java.util.concurrent.CountDownLatch latch
```
  - valueCount
```
private volatile int valueCount
```
    Written after an onNext value has been added to the values list.
  - lastSeenThread
```
private volatile java.lang.Thread lastSeenThread
```
  - INERT
```
private static final Observer<java.lang.Object> INERT
```
    The shared no-op observer.
- Constructor Detail
  - TestSubscriber
```
public TestSubscriber(long initialRequest)
```
    Constructs a TestSubscriber with the initial request to be requested from upstream.
    
    Parameters:
    
    initialRequest - the initial request value, negative value will revert to the default unbounded behavior
    
    Since:
    
    1.1.0
  - TestSubscriber
```
public TestSubscriber(Observer<T> delegate,
                      long initialRequest)
```
    Constructs a TestSubscriber with the initial request to be requested from upstream and a delegate Observer to wrap.
    
    Parameters:
    
    initialRequest - the initial request value, negative value will revert to the default unbounded behavior
    
    delegate - the Observer instance to wrap
    
    Throws:
    
    java.lang.NullPointerException - if delegate is null
    
    Since:
    
    1.1.0
  - TestSubscriber
```
public TestSubscriber(Subscriber<T> delegate)
```
    Constructs a TestSubscriber which requests Long.MAX_VALUE and delegates events to the given Subscriber.
    
    Parameters:
    
    delegate - the subscriber to delegate to.
    
    Throws:
    
    java.lang.NullPointerException - if delegate is null
    
    Since:
    
    1.1.0
  - TestSubscriber
```
public TestSubscriber(Observer<T> delegate)
```
    Constructs a TestSubscriber which requests Long.MAX_VALUE and delegates events to the given Observer.
    
    Parameters:
    
    delegate - the observer to delegate to.
    
    Throws:
    
    java.lang.NullPointerException - if delegate is null
    
    Since:
    
    1.1.0
  - TestSubscriber
```
public TestSubscriber()
```
    Constructs a TestSubscriber with an initial request of Long.MAX_VALUE and no delegation.
- Method Detail
  - create
```
public static <T> TestSubscriber<T> create()
```
    Factory method to construct a TestSubscriber with an initial request of Long.MAX_VALUE and no delegation.
    
    Type Parameters:
    
    T - the value type
    
    Returns:
    
    the created TestSubscriber instance
    
    Since:
    
    1.1.0
  - create
```
public static <T> TestSubscriber<T> create(long initialRequest)
```
    Factory method to construct a TestSubscriber with the given initial request amount and no delegation.
    
    Type Parameters:
    
    T - the value type
    
    Parameters:
    
    initialRequest - the initial request amount, negative values revert to the default unbounded mode
    
    Returns:
    
    the created TestSubscriber instance
    
    Since:
    
    1.1.0
  - create
```
public static <T> TestSubscriber<T> create(Observer<T> delegate,
                                           long initialRequest)
```
    Factory method to construct a TestSubscriber which delegates events to the given Observer and issues the given initial request amount.
    
    Type Parameters:
    
    T - the value type
    
    Parameters:
    
    delegate - the observer to delegate events to
    
    initialRequest - the initial request amount, negative values revert to the default unbounded mode
    
    Returns:
    
    the created TestSubscriber instance
    
    Throws:
    
    java.lang.NullPointerException - if delegate is null
    
    Since:
    
    1.1.0
  - create
```
public static <T> TestSubscriber<T> create(Subscriber<T> delegate)
```
    Factory method to construct a TestSubscriber which delegates events to the given Subscriber and an issues an initial request of Long.MAX_VALUE.
    
    Type Parameters:
    
    T - the value type
    
    Parameters:
    
    delegate - the subscriber to delegate events to
    
    Returns:
    
    the created TestSubscriber instance
    
    Throws:
    
    java.lang.NullPointerException - if delegate is null
    
    Since:
    
    1.1.0
  - create
```
public static <T> TestSubscriber<T> create(Observer<T> delegate)
```
    Factory method to construct a TestSubscriber which delegates events to the given Observer and an issues an initial request of Long.MAX_VALUE.
    
    Type Parameters:
    
    T - the value type
    
    Parameters:
    
    delegate - the observer to delegate events to
    
    Returns:
    
    the created TestSubscriber instance
    
    Throws:
    
    java.lang.NullPointerException - if delegate is null
    
    Since:
    
    1.1.0
  - onCompleted
```
public void onCompleted()
```
    Notifies the Subscriber that the Observable has finished sending push-based notifications.
    The Observable will not call this method if it calls onError(java.lang.Throwable).
  - getOnCompletedEvents
```
@Deprecated
public java.util.List<Notification<T>> getOnCompletedEvents()
```
    Deprecated.
    use getCompletions() instead.
    
    Returns the Notifications representing each time this Subscriber was notified of sequence completion via onCompleted(), as a List.
    
    Returns:
    
    a list of Notifications representing calls to this Subscriber's onCompleted() method
  - getCompletions
```
@Experimental
public final int getCompletions()
```
    Returns the number of times onCompleted was called on this TestSubscriber.
    
    Returns:
    
    the number of times onCompleted was called on this TestSubscriber.
    
    Since:
    
    (if this graduates from Experimental/Beta to supported, replace this parenthetical with the release number)
  - onError
```
public void onError(java.lang.Throwable e)
```
    Notifies the Subscriber that the Observable has experienced an error condition.
    If the Observable calls this method, it will not thereafter call onNext(T) or onCompleted().
    
    Parameters:
    
    e - the exception encountered by the Observable
  - getOnErrorEvents
```
public java.util.List<java.lang.Throwable> getOnErrorEvents()
```
    Returns the Throwables this Subscriber was notified of via onError(java.lang.Throwable) as a List.
    
    Returns:
    
    a list of the Throwables that were passed to this Subscriber's onError(java.lang.Throwable) method
  - onNext
```
public void onNext(T t)
```
    Provides the Subscriber with a new item to observe.
    The Observable may call this method 0 or more times.
    The Observable will not call this method again after it calls either onCompleted() or onError(java.lang.Throwable).
    
    Parameters:
    
    t - the item emitted by the Observable
  - getValueCount
```
public final int getValueCount()
```
    Returns the committed number of onNext elements that are safe to be read from getOnNextEvents() other threads.
    
    Returns:
    
    the committed number of onNext elements
  - requestMore
```
public void requestMore(long n)
```
    Allows calling the protected Subscriber.request(long) from unit tests.
    
    Parameters:
    
    n - the maximum number of items you want the Observable to emit to the Subscriber at this time, or Long.MAX_VALUE if you want the Observable to emit items at its own pace
  - getOnNextEvents
```
public java.util.List<T> getOnNextEvents()
```
    Returns the sequence of items observed by this Subscriber, as an ordered List.
    
    Returns:
    
    a list of items observed by this Subscriber, in the order in which they were observed
  - assertReceivedOnNext
```
public void assertReceivedOnNext(java.util.List<T> items)
```
    Asserts that a particular sequence of items was received by this Subscriber in order.
    
    Parameters:
    
    items - the sequence of items expected to have been observed
    
    Throws:
    
    java.lang.AssertionError - if the sequence of items observed does not exactly match items
  - awaitValueCount
```
@Experimental
public final boolean awaitValueCount(int expected,
                                     long timeout,
                                     java.util.concurrent.TimeUnit unit)
                              throws java.lang.InterruptedException
```
    Wait until the current committed value count is less than the expected amount by sleeping 1 unit at most timeout times and return true if at least the required amount of onNext values have been received.
    
    Parameters:
    
    expected - the expected number of onNext events
    
    timeout - the time to wait for the events
    
    unit - the time unit of waiting
    
    Returns:
    
    true if the expected number of onNext events happened
    
    Throws:
    
    java.lang.InterruptedException - if the sleep is interrupted
    
    Since:
    
    (if this graduates from Experimental/Beta to supported, replace this parenthetical with the release number)
  - assertTerminalEvent
```
public void assertTerminalEvent()
```
    Asserts that a single terminal event occurred, either onCompleted() or onError(java.lang.Throwable).
    
    Throws:
    
    java.lang.AssertionError - if not exactly one terminal event notification was received
  - assertUnsubscribed
```
public void assertUnsubscribed()
```
    Asserts that this Subscriber is unsubscribed.
    
    Throws:
    
    java.lang.AssertionError - if this Subscriber is not unsubscribed
  - assertNoErrors
```
public void assertNoErrors()
```
    Asserts that this Subscriber has received no onError notifications.
    
    Throws:
    
    java.lang.AssertionError - if this Subscriber has received one or more onError notifications
  - awaitTerminalEvent
```
public void awaitTerminalEvent()
```
    Blocks until this Subscriber receives a notification that the Observable is complete (either an onCompleted or onError notification).
    
    Throws:
    
    java.lang.RuntimeException - if the Subscriber is interrupted before the Observable is able to complete
  - awaitTerminalEvent
```
public void awaitTerminalEvent(long timeout,
                               java.util.concurrent.TimeUnit unit)
```
    Blocks until this Subscriber receives a notification that the Observable is complete (either an onCompleted or onError notification), or until a timeout expires.
    
    Parameters:
    
    timeout - the duration of the timeout
    
    unit - the units in which timeout is expressed
    
    Throws:
    
    java.lang.RuntimeException - if the Subscriber is interrupted before the Observable is able to complete
  - awaitTerminalEventAndUnsubscribeOnTimeout
```
public void awaitTerminalEventAndUnsubscribeOnTimeout(long timeout,
                                                      java.util.concurrent.TimeUnit unit)
```
    Blocks until this Subscriber receives a notification that the Observable is complete (either an onCompleted or onError notification), or until a timeout expires; if the Subscriber is interrupted before either of these events take place, this method unsubscribes the Subscriber from the Observable). If timeout expires then the Subscriber is unsubscribed from the Observable.
    
    Parameters:
    
    timeout - the duration of the timeout
    
    unit - the units in which timeout is expressed
  - getLastSeenThread
```
public java.lang.Thread getLastSeenThread()
```
    Returns the last thread that was in use when an item or notification was received by this Subscriber.
    
    Returns:
    
    the Thread on which this Subscriber last received an item or notification from the Observable it is subscribed to
  - assertCompleted
```
public void assertCompleted()
```
    Asserts that there is exactly one completion event.
    
    Throws:
    
    java.lang.AssertionError - if there were zero, or more than one, onCompleted events
    
    Since:
    
    1.1.0
  - assertNotCompleted
```
public void assertNotCompleted()
```
    Asserts that there is no completion event.
    
    Throws:
    
    java.lang.AssertionError - if there were one or more than one onCompleted events
    
    Since:
    
    1.1.0
  - assertError
```
public void assertError(java.lang.Class<? extends java.lang.Throwable> clazz)
```
    Asserts that there is exactly one error event which is a subclass of the given class.
    
    Parameters:
    
    clazz - the class to check the error against.
    
    Throws:
    
    java.lang.AssertionError - if there were zero, or more than one, onError events, or if the single onError event did not carry an error of a subclass of the given class
    
    Since:
    
    1.1.0
  - assertError
```
public void assertError(java.lang.Throwable throwable)
```
    Asserts that there is a single onError event with the exact exception.
    
    Parameters:
    
    throwable - the throwable to check
    
    Throws:
    
    java.lang.AssertionError - if there were zero, or more than one, onError events, or if the single onError event did not carry an error that matches the specified throwable
    
    Since:
    
    1.1.0
  - assertNoTerminalEvent
```
public void assertNoTerminalEvent()
```
    Asserts that there are no onError and onCompleted events.
    
    Throws:
    
    java.lang.AssertionError - if there was either an onError or onCompleted event
    
    Since:
    
    1.1.0
  - assertNoValues
```
public void assertNoValues()
```
    Asserts that there are no onNext events received.
    
    Throws:
    
    java.lang.AssertionError - if there were any onNext events
    
    Since:
    
    1.1.0
  - assertValueCount
```
public void assertValueCount(int count)
```
    Asserts that the given number of onNext events are received.
    
    Parameters:
    
    count - the expected number of onNext events
    
    Throws:
    
    java.lang.AssertionError - if there were more or fewer onNext events than specified by count
    
    Since:
    
    1.1.0
  - assertValues
```
public void assertValues(T... values)
```
    Asserts that the received onNext events, in order, are the specified items.
    
    Parameters:
    
    values - the items to check
    
    Throws:
    
    java.lang.AssertionError - if the items emitted do not exactly match those specified by values
    
    Since:
    
    1.1.0
  - assertValue
```
public void assertValue(T value)
```
    Asserts that there is only a single received onNext event and that it marks the emission of a specific item.
    
    Parameters:
    
    value - the item to check
    
    Throws:
    
    java.lang.AssertionError - if the Observable does not emit only the single item specified by value
    
    Since:
    
    1.1.0
  - assertionError
```
final void assertionError(java.lang.String message)
```
    Combines an assertion error message with the current completion and error state of this TestSubscriber, giving more information when some assertXXX check fails.
    
    Parameters:
    
    message - the message to use for the error

Class TestSubscriber<T>

Field Summary

Constructor Summary

Method Summary

Methods inherited from class rx.Subscriber

Methods inherited from class java.lang.Object

Field Detail

delegate

values

errors

completions

latch

valueCount

lastSeenThread

INERT

Constructor Detail

TestSubscriber

TestSubscriber

TestSubscriber

TestSubscriber

TestSubscriber

Method Detail

create

create

create

create

create

onCompleted

getOnCompletedEvents

getCompletions

onError

getOnErrorEvents

onNext

getValueCount

requestMore

getOnNextEvents

assertReceivedOnNext

awaitValueCount

assertTerminalEvent

assertUnsubscribed

assertNoErrors

awaitTerminalEvent

awaitTerminalEvent

awaitTerminalEventAndUnsubscribeOnTimeout

getLastSeenThread

assertCompleted

assertNotCompleted

assertError

assertError

assertNoTerminalEvent

assertNoValues

assertValueCount

assertValues

assertValue

assertionError