Mockable native static functions for PHP.

What is it?

Do you have a class method that calls a PHP native/built-in function like file_get_contents, which you then test by having to create a dummy file for it to ingest? Well, say hello to Parrot. Now you can inject the built-in File functions, along with many others as a dependency which you can mock out during tests.

Installation

composer require enzyme/parrot

Example

Let's take a look at what used to happen:

Using the built in method.

class Foo
{
    public function openConfig($file)
    {
        $contents = file_get_contents($file);
        return $contents;
    }
}

Testing...

public function FooTest
{
    $file = __DIR__ . '/actual_file.txt';
    $expected = 'Contents of actual_file.txt';

    $foo = new Foo;
    $actual = $foo->openConfig($file);

    $this->assertEquals($actual, $expected);
}

The problem with the above is, actual_file.txt needs to reside in your test folder, get shipped with your tests, have the correct permission etc... it's a hassle.

Now using Parrot.

use Enzyme\Parrot\File;

class Foo
{
    protected $fileDispatch;

    public function __construct(File $fileDispatch)
    {
        $this->fileDispatch = $fileDispatch;
    }

    public function openConfig($file)
    {
        $contents = $this->fileDispatch->getContents($file);
        return $contents;
    }
}

Testing...

public function FooTest
{
    $file = __DIR__ . '/fake_file.txt';
    $expected = 'Contents of fake_file.txt';

    $fileDispatch = m::mock('Enzyme\Parrot\File[getContents]', function ($mock) use ($expected, $file) {
        $mock->shouldReceive('getContents')->withArgs([$file, []])->times(1)->andReturn($expected);
    });


    $foo = new Foo($fileDispatch);
    $actual = $foo->openConfig($file);

    $this->assertEquals($actual, $expected);
}

Now we just fake the file and it's contents, sweet!!!

Sugar

You may have noticed in the above example that the Parrot version of file_get_contents was simply getContents().

With all the Parrot'd wrappers around PHP's functions, we leave off the prefix. Who wants to repeat themselves?

The function name rules.

1. If the original function name starts with a prefix like file_, f, curl_, imap_, mysql_ etc, you simply leave them off when using the equivalent class wrapper.

2. If the original name has an underscore in it, replace it with camelCase. So for example file_get_contents becomes getContents and mysql_affected_rows becomes affectedRows.

3. If the original name has a string of words, they are converted to camelCase too. For example imap_createmailbox becomes createMailbox.

4. If the original function, following the rules above now starts with a number, replace then number with it's spelt equivalent. For example imap_8bit becomes eightBit.

Wrappers

The follow wrappers are currently available:

Name	Prefixes removed
Curl	curl_
File	file, file_, f
Ftp	ftp_
Gz	gz
Image	image
Imap	imap_
MySql	mysql_
PostgreSql	pg_
Sqlite	sqlite_
Glob	glob (Simply becomes execute)

Missing something?

If there's a particular wrapper you're looking for and it isn't listed above, open a new issue, or simply extend Parrot following the rules in the existing wrappers and send a PR. Please check out CONTRIBUTING.md as well.