phpunit helper

PHPUnit Helper

Provides helper traits for PHPUnit.

• TestDouble ... Easy mock creation
• ReflectionHelper ... Easy private property/method testing
• DebugHelper ... Helper function dd() and d()

Table of Contents

• Requirements
• Installation
• Usage
  • TestDouble
    • $this->getDouble()
    • $this->verifyInvoked()
    • $this->verifyInvokedOnce()
    • $this->verifyInvokedMultipleTimes()
    • $this->verifyNeverInvoked()
  • ReflectionHelper
    • $this->getPrivateProperty()
    • $this->setPrivateProperty()
    • $this->getPrivateMethodInvoker()
  • DebugHelper
• License

Requirements

• PHP 7.3 or later

Installation

Run:

$ composer require --dev kenjis/phpunit-helper

Usage

TestDouble

This trait provides helper methods to create mock objects and to verify invocations.

Import the KenjisPhpUnitHelperTestDouble trait into your test class:

<?php

declare(strict_types=1);

namespace FooBarTestUnit;

use KenjisPhpUnitHelperTestDouble;
use PHPUnitFramework;

final class BazTest extends FrameworkTestCase
{
    use TestDouble;
}

$this->getDouble()

param	type	description
$classname	string	class name
$params	array	[method_name => return_value]
		[[method_name => [return_value1, return_value2 [, ...]]]
$constructor_params	false/array	false: disable constructor / array: constructor params

returns (object) PHPUnit mock object.

Gets PHPUnit mock object.

$email = $this->getMockBuilder(CI_Email::class)
    ->disableOriginalConstructor()
    ->onlyMethods(['send'])
    ->getMock();
$email->method('send')
    ->willReturn(true);

You could write code above like below:

$email = $this->getDouble(CI_Email::class, ['send' => true]);

You can set Closure as the return value of a mocked method.

$ret = function () {
    throw new RuntimeException('Cannot send email!');
};
$mock = $this->getDouble(CI_Email::class, ['send' => $ret]);

You can also set the mock itself as the return value of a mocked method with using $this->returnSelf().

$mock = $this->getDouble(CI_Email::class, [
    'to'      => $this->returnSelf(),
    'subject' => $this->returnSelf(),
    'send'    => true,
]);

You can create mocks with consecutive calls.

$mock = $this->getMockBuilder(CI_Email::class)
    ->disableOriginalConstructor()
    ->onlyMethods(['method'])
    ->getMock();
$mock->expects($this->any())->method('method')
    ->will($this->onConsecutiveCalls('GET', 'POST' ,'DELETE'));

You could write code above like below:

$mock = $this->getDouble(
    CI_Input::class,
    [
        ['method' => ['GET', 'POST' ,'DELETE']],
    ]
);

$this->verifyInvoked()

param	type	description
$mock	object	PHPUnit mock object
$method	string	method name
$params	array	arguments

Verifies a method was invoked at least once.

$loader->expects($this->atLeastOnce())
    ->method('view')
    ->with(
        'shopConfirm', $this->anything(), true
    );

You could write code above like below:

$this->verifyInvoked(
    $loader,
    'view',
    [
        'shopConfirm', $this->anything(), true
    ]
);

$this->verifyInvokedOnce()

param	type	description
$mock	object	PHPUnit mock object
$method	string	method name
$params	array	arguments

Verifies that method was invoked only once.

$loader->expects($this->once())
    ->method('view')
    ->with(
        'shopConfirm', $this->anything(), true
    );

You could write code above like below:

$this->verifyInvokedOnce(
    $loader,
    'view',
    [
        'shopConfirm', $this->anything(), true
    ]
);

$this->verifyInvokedMultipleTimes()

param	type	description
$mock	object	PHPUnit mock object
$method	string	method name
$times	int	times
$params	array	arguments

Verifies that method was called exactly $times times.

$loader->expects($this->exactly(2))
    ->method('view')
    ->withConsecutive(
        ['shopConfirm', $this->anything(), true],
        ['shopTmplCheckout', $this->anything()]
    );

You could write code above like below:

$this->verifyInvokedMultipleTimes(
    $loader,
    'view',
    2,
    [
        ['shopConfirm', $this->anything(), true],
        ['shopTmplCheckout', $this->anything()]
    ]
);

$this->verifyNeverInvoked()

param	type	description
$mock	object	PHPUnit mock object
$method	string	method name
$params	array	arguments

Verifies that method was not called.

$loader->expects($this->never())
    ->method('view')
    ->with(
        'shopConfirm', $this->anything(), true
    );

You could write code above like below:

$this->verifyNeverInvoked(
    $loader,
    'view',
    [
        'shopConfirm', $this->anything(), true
    ]
);

ReflectionHelper

This trait provides helper methods to access private or protected properties and methods.

But generally it is not recommended testing non-public properties or methods, so think twice before you use the methods in this trait.

Import the KenjisPhpUnitHelperReflectionHelper trait into your test class:

<?php

declare(strict_types=1);

namespace FooBarTestUnit;

use KenjisPhpUnitHelperReflectionHelper;
use PHPUnitFramework;

final class BazTest extends FrameworkTestCase
{
    use ReflectionHelper;
}

$this->getPrivateProperty()

param	type	description
$obj	object/string	object / class name
$property	string	property name

returns (mixed) property value.

Gets private or protected property value.

$obj = new SomeClass();
$private_propery = $this->getPrivateProperty(
	$obj,
	'privatePropery'
);

$this->setPrivateProperty()

param	type	description
$obj	object/string	object / class name
$property	string	property name
$value	mixed	value

Sets private or protected property value.

$obj = new SomeClass();
$this->setPrivateProperty(
	$obj,
	'privatePropery',
	'new value'
);

$this->getPrivateMethodInvoker()

param	type	description
$obj	object/string	object / class name
$method	string	method name

returns (closure) method invoker.

Gets private or protected method invoker.

$obj = new SomeClass();
$method = $this->getPrivateMethodInvoker(
	$obj, 'privateMethod'
);
$this->assertEquals(
	'return value of the privateMethod() method', $method()
);

DebugHelper

This trait provides helper functions, dd() and d() to dump variables.

Import the KenjisPhpUnitHelperDebugHelper trait into your test class:

<?php

declare(strict_types=1);

namespace FooBarTestUnit;

use KenjisPhpUnitHelperDebugHelper;
use PHPUnitFramework;

final class BazTest extends FrameworkTestCase
{
    use DebugHelper;
}

License

This package is licensed using the MIT License.

Please have a look at LICENSE.