A BDD testing framework

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Language: PHP

1.1.1 2015-01-26 01:52 UTC

README

pho

BDD test framework for PHP, inspired by Jasmine and RSpec. Features a familiar syntax, and a watch command to automatically re-run specs during development. It can also be extended with custom matchers and reporters.

Build Status

The following instructions outline installation using Composer. If you don't have Composer, you can download it from http://getcomposer.org/

  • Run either of the following commands, depending on your environment:
$ composer global require danielstjules/pho:dev-master
$ php composer.phar global require danielstjules/pho:dev-master
  • Edit your ~/.bash_profile or ~/.profile and add:
export PATH=$HOME/.composer/vendor/bin:$PATH

Usage

Usage: pho [options] [files]

Options

   -a   --ascii                     Show ASCII art on completion
   -b   --bootstrap   <bootstrap>   Bootstrap file to load
   -f   --filter      <pattern>     Run specs containing a pattern
   -h   --help                      Output usage information
   -n   --namespace                 Only use namespaced functions
   -r   --reporter    <name>        Specify the reporter to use
   -s   --stop                      Stop on failure
   -v   --version                   Display version number
   -w   --watch                     Watch files for changes and rerun specs
   -C   --no-color                  Disable terminal colors

Writing Specs

Pho exposes a DSL for organizing and writing your tests, which includes the following functions: describe, context, it, before, after, beforeEach, afterEach and expect. Equivalent functions for disabling specs and suites also exist via xdescribe, xcontext and xit.

To create a suite, describe and context can be used by passing them a string and function. Both are interchangeable, though context is more often nested in a describe to group some set of behaviour. it is then used to create a spec, or test.

A spec may contain multiple expectations or assertions, and will pass so long as all assertions pass and no exception is uncaught. For asserting values in pho, expect can be used. The function accepts the value to be tested, and may be chained with a handful of matchers.

<?php

describe('A suite', function() {
    it('contains specs with expectations', function() {
        expect(true)->toBe(true);
    });

    it('can have specs that fail', function() {
        expect(false)->not()->toBe(false);
    });

    it('can have incomplete specs');
});

intro-screenshot

Objects may be passed between suites and specs with php's use keyword. Here's an example:

describe('Example', function() {
    $object = new stdClass();
    $object->name = 'pho';

    context('name', function() use ($object) {
        it('is set to pho', function()  use ($object) {
            expect($object->name)->toBe('pho');
        });
    });
});

Things can get a bit verbose when dealing with multiple objects that need to be passed into closures with use. To avoid such long lists of arguments, $this can be used to set and retrieve values between suites and specs.

describe('SomeClass', function() {
    $this->key1 = 'initialValue';
    $this->key2 = 'initialValue';

    context('methodOne()', function() {
        $this->key1 = 'changedValue';

        it('contains a spec', function() {
            expect($this->key1)->toBe('changedValue');
            expect($this->key2)->toBe('initialValue');
        });
    });

    context('methodTwo()', function() {
        it('contains another spec', function() {
            expect($this->key1)->toBe('initialValue');
            expect($this->key2)->toBe('initialValue');
        });
    });
});

Hooks are available for running functions as setups and teardowns. before is ran prior to any specs in a suite, and after, once all in the suite have been ran. beforeEach and afterEach both run their closures once per spec. Note that beforeEach and afterEach are both stackable, and will apply to specs within nested suites.

describe('Suite with Hooks', function() {
    $this->count = 0;

    beforeEach(function() {
        $this->count = $this->count + 1;
    });

    it('has a count equal to 1', function() {
        expect($this->count)->toEqual(1);
        // A single beforeEach ran
    });

    context('nested suite', function() {
        beforeEach(function() {
            $this->count = $this->count + 1;
        });

        it('has a count equal to 3', function() {
            expect($this->count)->toEqual(3);
            // Both beforeEach closures incremented the value
        });
    });
});

Running Specs

By default, pho looks for specs in either a test or spec folder under the working directory. It will recurse through all subfolders and run any files ending with Spec.php, ie: userSpec.php. Furthermore, continuous testing is as easy as using the --watch option, which will monitor all files in the path for changes, and rerun specs on save.

watch

Expectations/Matchers

Type Matching
expect('pho')->toBeA('string');
expect(1)->notToBeA('string');
expect(1)->not()->toBeA('string');

expect(1)->toBeAn('integer'); // Alias for toBeA
expect('pho')->notToBeAn('integer');
expect('pho')->not()->toBeA('integer');
Instance Matching
expect(new User())->toBeAnInstanceOf('User');
expect(new User())->not()->toBeAnInstanceOf('Post');
expect(new User())->notToBeAnInstanceOf('Post');
Strict Equality Matching
expect(true)->toBe(true);
expect(true)->not()->toBe(false);
expect(true)->notToBe(false);

expect(['foo'])->toEqual(['foo']); // Alias for toBe
expect(['foo'])->not()->toEqual(true);
expect(['foo'])->notToEqual(true);
Loose Equality Matching
expect(1)->toEql(true);
expect(new User('Bob'))->not()->ToEql(new User('Alice'))
expect(new User('Bob'))->notToEql(new User('Alice'))
Length Matching
expect(['tdd', 'bdd'])->toHaveLength(2);
expect('pho')->not()->toHaveLength(2);
expect('pho')->notToHaveLength(2);

expect([])->toBeEmpty();
expect('pho')->not()->toBeEmpty();
expect('pho')->notToBeEmpty();
Inclusion Matching
expect('Spectacular!')->toContain('Spec');
expect(['a', 'b'])->not()->toContain('c');
expect(['a', 'b'])->notToContain('c');

expect('testing')->toContain('test', 'ing'); // Accepts multiple args
expect(['tdd', 'test'])->not()->toContain('bdd', 'spec');
expect(['tdd', 'test'])->notToContain('bdd', 'spec');

expect(['name' => 'pho'])->toHaveKey('name');
expect(['name' => 'pho'])->not()->toHaveKey('id');
expect(['name' => 'pho'])->notToHaveKey('id');
Pattern Matching
expect('tdd')->toMatch('/\w[D]{2}/i');
expect('pho')->not()->toMatch('/\d+/');
expect('pho')->notToMatch('/\d+/');

expect('username')->toStartWith('user');
expect('spec')->not()->toStartWith('test');
expect('spec')->notToStartWith('test');

expect('username')->toEndWith('name');
expect('spec')->not()->toEndWith('s');
expect('spec')->notToEndtWith('s');
Numeric Matching
expect(2)->toBeGreaterThan(1);
expect(2)->not()->toBeGreaterThan(2);
expect(1)->notToBeGreaterThan(2);

expect(2)->toBeAbove(1); // Alias for toBeGreaterThan
expect(2)->not()->toBeAbove(2);
expect(1)->notToBeAbove(2);

expect(1)->toBeLessThan(2);
expect(1)->not()->toBeLessThan(1);
expect(2)->notToBeLessThan(1);

expect(1)->toBeBelow(2); // Alias for toBeLessThan
expect(1)->not()->toBeBelow(1);
expect(2)->notToBeBelow(1);

expect(1)->toBeWithin(1, 10); // Inclusive
expect(-2)->not()->toBeWithin(-1, 0);
expect(-2)->notToBeWithin(-1, 0);
Print Matching
$callable = function() {
  echo 'test'
};

expect($callable)->toPrint('test');
expect($callable)->not()->toPrint('testing');
expect($callable)->notToPrint('testing');
Exception Matching
$callable = function() {
  throw new Custom\Exception('error!');
};

expect($callable)->toThrow('Custom\Exception');
expect($callable)->not()->toThrow('\ErrorException');
expect($callable)->notToThrow('\ErrorException');

Custom Matchers

Custom matchers can be added by creating a class that implements pho\Expectation\Matcher\MatcherInterface and registering the matcher with pho\Expectation\Expectation::addMatcher(). Below is an example of a basic matcher:

namespace example;

use pho\Expectation\Matcher\MatcherInterface;

class ExampleMatcher implements MatcherInterface
{
    protected $expectedValue;

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

    public function match($actualValue)
    {
        return ($actualValue === $this->expectedValue);
    }

    public function getFailureMessage($negated = false)
    {
        if (!$negated) {
            return "Expected value to be {$this->expectedValue}";
        } else {
            return "Expected value not to be {$this->expectedValue}";
        }
    }
}

Registering it:

use pho\Expectation\Expectation;

// Register the matcher
Expectation::addMatcher('toHaveValue', '\example\ExampleMatcher');

And that's it! You would now have access to the following:

expect($actual)->toHaveValue($expected);
expect($actual)->not()->toHaveValue($expected);
expect($actual)->notToHaveValue($expected);

Reporters

dot (default)
$ pho --reporter dot exampleSpec.php

.FI

Failures:

"A suite can have specs that fail" FAILED
/Users/danielstjules/Desktop/exampleSpec.php:9
Expected false not to be false

Finished in 0.00125 seconds

3 specs, 1 failure, 1 incomplete
spec
$ pho --reporter spec exampleSpec.php

A suite
    contains specs with expectations
    can have specs that fail
    can have incomplete specs

Failures:

"A suite can have specs that fail" FAILED
/Users/danielstjules/Desktop/exampleSpec.php:9
Expected false not to be false

Finished in 0.0012 seconds

3 specs, 1 failure, 1 incomplete
list
$ pho --reporter list exampleSpec.php

A suite contains specs with expectations
A suite can have specs that fail
A suite can have incomplete specs

Failures:

"A suite can have specs that fail" FAILED
/Users/danielstjules/Desktop/exampleSpec.php:9
Expected false not to be false

Finished in 0.0012 seconds

3 specs, 1 failure, 1 incomplete

Mocking

Pho doesn't currently provide mocks/stubs out of the box. Instead, it's suggested that a mocking framework such as prophecy or mockery be used.

Note: Tests cannot be failed within a test hook. If you need to check mock object expectations after running a spec, make sure you do so within the spec body. In the following example this is achieved using the $teardown closure, although the name is not significant.

describe('A suite', function() {
    // Any last checks that could fail a test would go here
    $this->teardown = function() {
        Mockery::close();
    };

    it('should check mock object expectations', function() {
        $mock = Mockery::mock('simplemock');
        $mock->shouldReceive('foo')->with(5)->once()->andReturn(10);
        expect($mock->foo(5))->toBe(10);

        $this->teardown();
    });
});

Namespace

If you'd rather not have pho use the global namespace for its functions, you can set the --namespace flag to force it to only use the pho namespace. This will be a nicer alternative in PHP 5.6 with https://wiki.php.net/rfc/use_function

pho\describe('A suite', function() {
    pho\it('contains specs with expectations', function() {
        pho\expect(true)->toBe(true);
    });

    pho\it('can have specs that fail', function() {
        pho\expect(false)->not()->toBe(false);
    });
});