***
Appium is an open-source automation framework that provides
[WebDriver](https://www.w3.org/TR/webdriver/)-based automation possibilities for a wide range of
different mobile, desktop and IoT platforms. Appium is modular and extensible, and supports multiple
programming languages, which means there is an entire ecosystem of related software:
* [__Drivers__](#drivers) add support for automating specific platforms
* [__Clients__](#clients) allow writing Appium tests in your programming language of choice
* [__Plugins__](#plugins) allow to further extend Appium functionality
## Upgrading From Older Versions
The Appium team only provides support for the most recent version of Appium. If you wish to upgrade from
an older major Appium version, please refer to the migration guides:
* [Appium v2 to v3](https://appium.io/docs/en/latest/guides/migrating-2-to-3/)
* [Appium v1 to v2](https://appium.io/docs/en/latest/guides/migrating-1-to-2/)
## Installation
Appium can be installed using `npm` (other package managers are not currently supported). Please
check the [installation docs](http://appium.io/docs/en/latest/quickstart/install/) for the
system requirements and further information.
If upgrading from Appium 1, make sure Appium 1 is fully uninstalled (`npm uninstall -g appium`).
Unexpected errors might appear if this has not been done.
```bash
npm i -g appium
```
Note that this will only install the core Appium server, which cannot automate anything on its own.
Please install [drivers](#drivers) for your target platforms in order to automate them.
## Drivers
Appium supports app automation across a variety of platforms, like iOS, Android, macOS, Windows,
and more. Each platform is supported by one or more "drivers", which know how to automate that
particular platform. You can find a full list of officially-supported and third-party drivers in
[Appium Ecosystem's Drivers page](http://appium.io/docs/en/latest/ecosystem/drivers/).
Driver management is done using [Appium's Extension command-line interface](http://appium.io/docs/en/latest/cli/extensions/):
```bash
# Install an official driver from npm (see documentation for a list of such drivers)
appium driver install
# Install any driver from npm
appium driver install --source=npm
# See documentation for installation from other sources
# List already installed drivers
appium driver list --installed
# Update a driver (it must be already installed)
# This will NOT update the major version, in order to prevent breaking changes
appium driver update
# Update a driver to the most recent version (may include breaking changes)
appium driver update --unsafe
# Uninstall a driver (it won't last forever, will it?)
appium driver uninstall
```
## Clients
Client libraries enable writing Appium tests in different programming languages. There are
officially-supported clients for Java, Python, Ruby, and .NET C#, as well as third-party clients
for other languages. You can find a full list of clients in
[Appium Ecosystem's Clients page](http://appium.io/docs/en/latest/ecosystem/clients/).
## Plugins
Plugins allow you to extend server functionality without changing the server code. The main
difference between drivers and plugins is that the latter must be explicitly enabled on
Appium server startup (all installed drivers are enabled by default):
```bash
appium --use-plugins=
```
You can find a full list of officially-supported and third-party plugins in
[Appium Ecosystem's Plugins page](http://appium.io/docs/en/latest/ecosystem/plugins/).
Similarly to drivers, plugin management is also done using
[Appium's Extension command-line interface](http://appium.io/docs/en/latest/cli/extensions/):
```bash
# Install an official plugin from npm (see documentation for a list of such plugins)
appium plugin install
# Install any plugin from npm
appium plugin install --source=npm
# See documentation for installation from other sources
# List already installed plugins
appium plugin list --installed
# Update a plugin (it must be already installed)
# This will NOT update the major version, in order to prevent breaking changes
appium plugin update
# Update a plugin to the most recent version (may include breaking changes)
appium plugin update --unsafe
# Uninstall a plugin
appium plugin uninstall
```
## Server Command Line Interface
In order to start sending commands to the Appium server, it must be running on the URL and port
where your client library expects it to listen. [Appium's command-line interface](http://appium.io/docs/en/latest/cli/args/)
is used to launch and configure the server:
```bash
# Start the server on the default host (0.0.0.0) and port (4723)
appium server
# You can also omit the 'server' subcommand
appium
# Start the server on the given host, port and use a custom base path prefix (the default prefix is '/')
appium --address 127.0.0.1 --port 9000 --base-path /wd/hub
```
Appium supports execution of parallel server processes, as well as parallel driver sessions within a
single server process. Refer the corresponding driver documentations regarding which mode is optimal
for the particular driver or whether it supports parallel sessions.
## Why Appium?
1. You usually don't have to recompile your app or modify it in any way, due to the use of standard
automation APIs on all platforms.
2. You can write tests with your favorite dev tools using any WebDriver-compatible language such as
Java, Python, Ruby and C#. There are also third party client implementations for other languages.
3. You can use any testing framework.
4. Some drivers like `xcuitest` and `uiautomator2` have built-in mobile web and hybrid app support.
Within the same script, you can switch seamlessly between native app automation and webview
automation, all using the WebDriver model that's already the standard for web automation.
5. You can run your automated tests locally and in a cloud. There are multiple cloud providers that
support various Appium drivers (mostly targeting iOS and Android mobile automation).
6. [Appium Inspector](https://github.com/appium/appium-inspector) can be used to visually inspect
the page source of applications across different platforms, facilitating easier test development.
Investing in the [WebDriver](https://w3c.github.io/webdriver/webdriver-spec.html) protocol means you
are betting on a single, free, and open protocol for testing that has become a web standard. Don't
lock yourself into a proprietary stack.
For example, if you use Apple's XCUITest library without Appium, you can only write tests using
Obj-C/Swift, and you can only run tests through Xcode. Similarly, with Google's UiAutomator or
Espresso, you can only write tests in Java/Kotlin. Appium opens up the possibility of true
cross-platform native app automation, for mobile and beyond!
If you are looking for a more comprehensive description of what this is all about, please read our
documentation on [How Does Appium Work?](https://appium.io/docs/en/latest/intro/appium/).
## Sponsors
Appium has a [Sponsorship Program](GOVERNANCE.md#sponsorship)! If you or your company uses Appium
and wants to give back financially to the project, we use these funds to [encourage development and
contributions](GOVERNANCE.md#compensation-scheme), as well as support other open source projects we
rely on. [Become a sponsor](https://opencollective.com/appium) via our OpenCollective page.
### Development and Strategic Partners
Appium is incredibly grateful to our Development and Strategic Partners for their sustained
contribution of project development and leadership!
### Other Sponsors
A full list of sponsors is available at our [Sponsors page](https://appium.io/docs/en/latest/sponsors/).
## License
[Apache-2.0](./LICENSE)
[](https://app.fossa.io/projects/git%2Bhttps%3A%2F%2Fgithub.com%2Fappium%2Fappium?ref=badge_large)
`@appium/logger` package is under [ISC](./packages/logger/LICENSE) License.
