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## Codeception\Test\Feature\Stub

### Usage in Codeception

Since Codeception 2.3.8 this trait is enabled in `\Codeception\Test\Unit` class.

### Usage in PHPUnit

Include this trait into a TestCase to be able to use Stubs and Mocks:

```php
<?php
class MyTest extends \PHPUnit\Framework\TestCase
{
     use Codeception\Test\Feature\Stub;
}
```

#### *public* make($class, $params = null) 
Instantiates a class without executing a constructor.
Properties and methods can be set as a second parameter.
Even protected and private properties can be set.

``` php
<?php
$this->make('User');
$this->make('User', ['name' => 'davert']);
?>
```

Accepts either name of class or object of that class

``` php
<?php
$this->make(new User, ['name' => 'davert']);
?>
```

To replace method provide it's name as a key in second parameter
and it's return value or callback function as parameter

``` php
<?php
$this->make('User', ['save' => function () { return true; }]);
$this->make('User', ['save' => true]);
```

* `param mixed` $class - A class to be mocked
 * `param array` $params - properties and methods to set

* return object - mock
 * throws \RuntimeException when class does not exist
 * throws \Exception

#### *public* makeEmpty($class, $params = null) 
Instantiates class having all methods replaced with dummies.
Constructor is not triggered.
Properties and methods can be set as a second parameter.
Even protected and private properties can be set.

``` php
<?php
$this->makeEmpty('User');
$this->makeEmpty('User', ['name' => 'davert']);
```

Accepts either name of class or object of that class

``` php
<?php
$this->makeEmpty(new User, ['name' => 'davert']);
```

To replace method provide it's name as a key in second parameter
and it's return value or callback function as parameter

``` php
<?php
$this->makeEmpty('User', ['save' => function () { return true; }]);
$this->makeEmpty('User', ['save' => true));
```

* `param mixed` $class
 * `param array` $params
 * `param bool|\PHPUnit\Framework\TestCase` $testCase

* return object
 * throws \Exception

#### *public* makeEmptyExcept($class, $method, $params = null) 
Instantiates class having all methods replaced with dummies except one.
Constructor is not triggered.
Properties and methods can be replaced.
Even protected and private properties can be set.

``` php
<?php
$this->makeEmptyExcept('User', 'save');
$this->makeEmptyExcept('User', 'save', ['name' => 'davert']);
?>
```

Accepts either name of class or object of that class

``` php
<?php
* $this->makeEmptyExcept(new User, 'save');
?>
```

To replace method provide it's name as a key in second parameter
and it's return value or callback function as parameter

``` php
<?php
$this->makeEmptyExcept('User', 'save', ['isValid' => function () { return true; }]);
$this->makeEmptyExcept('User', 'save', ['isValid' => true]);
```

* `param mixed` $class
 * `param string` $method
 * `param array` $params

* return object
 * throws \Exception

#### *public* construct($class, $constructorParams = null, $params = null) 
Instantiates a class instance by running constructor.
Parameters for constructor passed as second argument
Properties and methods can be set in third argument.
Even protected and private properties can be set.

``` php
<?php
$this->construct('User', ['autosave' => false]);
$this->construct('User', ['autosave' => false], ['name' => 'davert']);
?>
```

Accepts either name of class or object of that class

``` php
<?php
$this->construct(new User, ['autosave' => false), ['name' => 'davert']);
?>
```

To replace method provide it's name as a key in third parameter
and it's return value or callback function as parameter

``` php
<?php
$this->construct('User', [], ['save' => function () { return true; }]);
$this->construct('User', [], ['save' => true]);
?>
```

* `param mixed` $class
 * `param array` $constructorParams
 * `param array` $params
 * `param bool|\PHPUnit\Framework\TestCase` $testCase

* return object
 * throws \Exception

#### *public* constructEmpty($class, $constructorParams = null, $params = null) 
Instantiates a class instance by running constructor with all methods replaced with dummies.
Parameters for constructor passed as second argument
Properties and methods can be set in third argument.
Even protected and private properties can be set.

``` php
<?php
$this->constructEmpty('User', ['autosave' => false]);
$this->constructEmpty('User', ['autosave' => false), ['name' => 'davert']);
```

Accepts either name of class or object of that class

``` php
<?php
$this->constructEmpty(new User, ['autosave' => false], ['name' => 'davert']);
```

To replace method provide it's name as a key in third parameter
and it's return value or callback function as parameter

``` php
<?php
$this->constructEmpty('User', array(), array('save' => function () { return true; }));
$this->constructEmpty('User', array(), array('save' => true));
```

**To create a mock, pass current testcase name as last argument:**

```php
<?php
$this->constructEmpty('User', [], [
     'save' => \Codeception\Stub\Expected::once()
]);
```

* `param mixed` $class
 * `param array` $constructorParams
 * `param array` $params

* return object

#### *public* constructEmptyExcept($class, $method, $constructorParams = null, $params = null) 
Instantiates a class instance by running constructor with all methods replaced with dummies, except one.
Parameters for constructor passed as second argument
Properties and methods can be set in third argument.
Even protected and private properties can be set.

``` php
<?php
$this->constructEmptyExcept('User', 'save');
$this->constructEmptyExcept('User', 'save', ['autosave' => false], ['name' => 'davert']);
?>
```

Accepts either name of class or object of that class

``` php
<?php
$this->constructEmptyExcept(new User, 'save', ['autosave' => false], ['name' => 'davert']);
?>
```

To replace method provide it's name as a key in third parameter
and it's return value or callback function as parameter

``` php
<?php
$this->constructEmptyExcept('User', 'save', [], ['save' => function () { return true; }]);
$this->constructEmptyExcept('User', 'save', [], ['save' => true]);
?>
```

* `param mixed` $class
 * `param string` $method
 * `param array` $constructorParams
 * `param array` $params

* return object