# Rx.Subscription

Records information about subscriptions to and unsubscriptions from observable sequences.

### Location

* rx.testing.js

## `Subscription Constructor` #\#

* [`constructor`](/rxjs-book/summary/testing/subscription.md#rxsubscriptionsubscribe-unsubscribe)

## `Subscription Instance Methods` #\#

* [`equals`](/rxjs-book/summary/testing/subscription.md#rxsubscriptionprototypeequalsother)
* [`toString`](/rxjs-book/summary/testing/subscription.md#rxsubscriptionprototypetostring)

## `Subscription Instance Properties` #\#

* [`subscribe`](/rxjs-book/summary/testing/subscription.md#subscribe)
* [`unsubscribe`](/rxjs-book/summary/testing/subscription.md#unsubscribe)

## *Subscription Constructor* #\#

### `Rx.Subscription(subscribe, unsubscribe)` <a href="#rxsubscriptionsubscribe-unsubscribe" id="rxsubscriptionsubscribe-unsubscribe"></a>

[#](/rxjs-book/summary/testing/subscription.md#rxsubscriptionsubscribe-unsubscribe) [Ⓢ](https://github.com/Reactive-Extensions/RxJS/blob/master/src/core/testing/subscription.js#L8-L11)

Creates a new subscription object with the given virtual subscription and unsubscription time.

#### Arguments

1. `subscribe` *(Number)*: Virtual time at which the subscription occurred.
2. `[unsubscribe = Number.MAX_VALUE]` *(Number)*: Virtual time at which the unsubscription occurred.

#### Example

```javascript
var subscription = new Rx.Subscription(200, 1000);

console.log(recorded.time);
// => 200

console.log(recorded.unsubscribe);
// => 1000
```

### Location

* rx.testing.js

## *Subscription Instance Methods* #\#

### `Rx.Subscription.prototype.equals(other)` <a href="#rxsubscriptionprototypeequalsother" id="rxsubscriptionprototypeequalsother"></a>

[#](/rxjs-book/summary/testing/subscription.md#rxsubscriptionprototypeequalsother) [Ⓢ](https://github.com/Reactive-Extensions/RxJS/blob/master/src/core/testing/subscription.js#L18-L20)

Checks whether the given subscription is equal to the current instance.

#### Arguments

1. `other` *(Subscription)*: Subscription object to check for equality.

#### Returns

*(Boolean)*: Returns `true` if the Subscription equals the other, else `false`.

#### Example

```javascript
var s1 = new Subscription(201, 500);
var s2 = new Subscription(201);
var s3 = new Subscription(201, 500);

console.log(s1.equals(s2));
// => false

console.log(s1.equals(s3));
// => true
```

### Location

* rx.testing.js

### `Rx.Subscription.prototype.toString()` <a href="#rxsubscriptionprototypetostring" id="rxsubscriptionprototypetostring"></a>

[#](/rxjs-book/summary/testing/subscription.md#rxsubscriptionprototypeequalsother) [Ⓢ](https://github.com/Reactive-Extensions/RxJS/blob/master/src/core/testing/subscription.js#L30-L32)

Returns a string representation of the current Subscription value.

#### Returns

*(String)*: String representation of the current Subscription value.

#### Example

```javascript
var s1 = new Subscription(201);

console.log(s1.toString());
// => (201, Infinite)

var s2 = new Subscription(201, 1000);
console.log(s2.toString());
// => (201, 1000)
```

### Location

* rx.testing.js

## *Subscription Instance Properties* #\#

### `subscribe` <a href="#subscribe" id="subscribe"></a>

[#](/rxjs-book/summary/testing/subscription.md#subscribe) [Ⓢ](https://github.com/Reactive-Extensions/RxJS/blob/master/src/core/testing/subscription.js#L8)

Gets the subscription virtual time.

#### Returns

*(Number)*: The subscription virtual time.

#### Example

```javascript
var s1 = new Subscription(201);

console.log(s1.subscribe);
// => 201
```

### Location

* rx.testing.js

### `unsubscribe` <a href="#unsubscribe" id="unsubscribe"></a>

[#](/rxjs-book/summary/testing/subscription.md#value) [Ⓢ](https://github.com/Reactive-Extensions/RxJS/blob/master/src/core/testing/subscription.js#L9)

Gets the unsubscription virtual time.

#### Returns

*(Number)*: The unsubscription virtual time.

#### Example

```javascript
var s1 = new Subscription(201, 500);

console.log(r1.unsubscribe);
// => foo
```

### Location

* rx.testing.js


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://soufatn.gitbook.io/rxjs-book/summary/testing/subscription.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.