Scientist Utility Matchers

Simple type, utility matchers for use with the Scientist Library

1. Installation

Require the latest version of Scientist Symfony using Composer.

composer require danhanly/scientist-utility-matcher

2. Matchers

There are a number of simple matchers packaged within this project, for use with your experiments.

2.1 ObjectPropertyMatcher

This allows you to match specific properties on objects returned with the control and trial processes.

When initialising the matcher, you can configure it to either match against a single property (via string), or multiple properties (via array)

// initialise matcher
$matcher = new \DanHanly\Scientist\UtilityMatchers\ObjectPropertyMatcher;
// define property via string
$matcher->setProperties('propertyName');
// or via array
$matcher->setProperties(['propertyName', 'anotherPropertyName']);

You can also set properties directly via the matcher constructor.

// define property via string
$matcher = new \DanHanly\Scientist\UtilityMatchers\ObjectPropertyMatcher('propertyName');
// or via array
$matcher = new \DanHanly\Scientist\UtilityMatchers\ObjectPropertyMatcher(['propertyName', 'anotherPropertyName']);

2.2 ArrayKeyMatcher

This allows you to match specific keys on arrays returned with the control and trial processes.

2.2.1 Simple Key Matching

When initialising the matcher, you can configure it to either match against a single key (via string), or multiple keys (via array)

// initialise matcher
$matcher = new \DanHanly\Scientist\UtilityMatchers\ArrayKeyMatcher;
// define keys via string
$matcher->setKeys('keyName');
// or via array
$matcher->setKeys(['keyName', 'anotherKeyName']);

You can also set keys directly via the matcher constructor.

// define key via string
$matcher = new \DanHanly\Scientist\UtilityMatchers\ArrayKeyMatcher('keyName');
// or via array
$matcher = new \DanHanly\Scientist\UtilityMatchers\ArrayKeyMatcher(['keyName', 'anotherKeyName']);

2.2.2 Deep Key Matching

Array deep key matching can be done with the -> delimiter.

Say for example you wanted to match the zip code of an address, but the address is stored in $array['data']['user']['address']['zip'], your matching notation would be data->user->address->zip

// define key via string
$matcher = new \DanHanly\Scientist\UtilityMatchers\ArrayKeyMatcher('data->user->address->zip');

2.3 MinMaxMatcher

This allows you to ensure that both the trial values and the control values are within a predefined threshold.

When initialising the matcher, you can configure it to match only those that are greater than a minimum value, those that are less than a maximum value, or a combination of both.

The first parameter is the minimum value, the second parameter is the maximum value.

// intialise with a 0 minimum
$matcher = new \DanHanly\Scientist\UtilityMatchers\MinMaxMatcher(0);
// intialise with a 10 maximum
$matcher = new \DanHanly\Scientist\UtilityMatchers\MinMaxMatcher(null, 10);
// intialise between 0 and 10
$matcher = new \DanHanly\Scientist\UtilityMatchers\MinMaxMatcher(0, 10);

3. Usage

Once you've initialised and configured your matcher, you can use it within your experiments.

$experiment = (new Scientist\Laboratory)
  ->experiment('experiment title')
  ->control($controlCallback)
  ->trial('trial name', $trialCallback)
  ->matcher($matcher);