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Testing environment setup
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======================
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> Note: This section is under development.
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Yii2 has officially maintained integration with [`Codeception`](https://github.com/Codeception/Codeception) testing
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framework that allows you to create the following test types:
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- [Unit testing](test-unit.md) - verifies that a single unit of code is working as expected;
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- [Functional testing](test-functional.md) - verifies scenarios from a user's perspective via browser emulation;
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- [Acceptance testing](test-acceptance.md) - verifies scenarios from a user's perspective in a browser.
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Yii provides ready to use test sets for all three test types in both
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[`yii2-basic`](https://github.com/yiisoft/yii2/tree/master/apps/basic) and
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[`yii2-advanced`](https://github.com/yiisoft/yii2/tree/master/apps/advanced) application templates.
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In order to run tests you need to install [Codeception](https://github.com/Codeception/Codeception). A good way to
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install it is the following:
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```
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composer global require "codeception/codeception=2.0.*"
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composer global require "codeception/specify=*"
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composer global require "codeception/verify=*"
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```
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If you've never used Composer for global packages before, run `composer global status`. It should output:
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```
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Changed current directory to <directory>
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```
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Then add `<directory>/vendor/bin` to you `PATH` environment variable. Now we're able to use `codecept` from command
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line globally.
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