README

A simple interface to get the current time without binding to global system resources plus trivial implementations that facilitate testing.

Clock Usage

function yourCode(Clock $clock) {
    $time = $clock->now(); // Returns DateTimeImmutable. No global access and easily testable
}

Clock interface:

interface Clock {
    public function now(): \DateTimeImmutable;
}

Provided implementations:

• SystemClock: Uses global system resources
• StubClock: Returns value provided in the constructor. Useful in tests
• CollectionClock: Returns specified values sequentially. Useful in tests
• IncrementingClock: Returns an incremented starting time infinitely. Useful in tests

Installation

To use the Clock library in your project, simply add a dependency on wmde/clock to your project's composer.json file. Here is a minimal example of a composer.json file that just defines a dependency on Clock 1.x:

{
    "require": {
        "wmde/clock": "~1.0"
    }
}

Development

For development you need to have Docker and Docker-compose installed. Local PHP and Composer are not needed.

sudo apt-get install docker docker-compose

Running Composer

To pull in the project dependencies via Composer, run:

make composer install

You can run other Composer commands via make run, but at present this does not support argument flags. If you need to execute such a command, you can do so in this format:

docker run --rm --interactive --tty --volume $PWD:/app -w /app\
 --volume ~/.composer:/composer --user $(id -u):$(id -g) composer composer install --no-scripts

Where composer install --no-scripts is the command being run.

Running the CI checks

To run all CI checks, which includes PHPUnit tests, PHPCS style checks and coverage tag validation, run:

make

Running the tests

To run just the PHPUnit tests run

make test

To run only a subset of PHPUnit tests or otherwise pass flags to PHPUnit, run

docker-compose run --rm app ./vendor/bin/phpunit --filter SomeClassNameOrFilter

Release notes

1.0.0 (2018-09-26)

Initial release with Clock, SystemClock, StubClock, CollectionClock and IncrementingClock