public function testOrElseOnSomeWithCallback()
{
$option = Option::create(0)->orElse(function () {
throw new RuntimeException('orElse on some');
});
$this->assertSame(0, $option->get());
}
public function testTestGetOrCallOnSome()
{
$value = Option::create(0)->getOrCall(function () {
return 1;
});
$this->assertSame(0, $value);
}
public function __construct()
{
parent::__construct();
$this->mapIdentity = function ($value) {
return $value;
};
$this->mapIdentityOption = function ($value) {
return Option::create($value);
};
}
public function testEachOnSome()
{
$option = Option::create(0)->each(function ($value) {
$this->assertSame(0, $value);
});
}
public function testMagicInvokeOnSomeWithoutParameter()
{
$option = Option::create(0);
$this->assertSame(0, $option());
}
public function __construct()
{
$this->none = Option::none();
$this->some = new Some(0);
}
public function testGetOrElseOnSomeWithCallback()
{
$this->assertSame(0, Option::create(0)->getOrElse(function () {
throw new RuntimeException('getOrElse on some');
}));
}
public function testMagicGetOnArrayWithoutKey()
{
$array = ['defined' => ['key' => 0]];
$this->assertSame($this->none, Option::create($array)->undefined->key);
}
public function testMagicIssetOnArrayWithoutKey()
{
$array = ['defined' => ['key' => 0]];
$this->assertFalse(isset(Option::create($array)->undefined->key));
}
public function testCreateNoneFromCallbackWithCustomEmptyCallback()
{
$option = Option::create(function () {
return 0;
}, function ($value) {
return $value === 0;
});
$this->assertSame($this->none, $option);
}
public function orElse($default)
{
return Option::create($this->getOrElse($default));
}
public function testGetOnSome()
{
$this->assertSame(0, Option::create(0)->get());
}
public function __get($name)
{
return Option::create($this->getPropertyOrKey($name));
}
public function testGetOrThrowOnSome()
{
$this->assertSame(0, Option::create(0)->getOrThrow(new RuntimeException()));
}
public function testMagicToStringOnSome()
{
$this->assertSame('0', (string) Option::create(0));
}
/**
* invoke magic method.
*
* Make the Option callable.
* Return the Option's value if is non-empty,
* $default otherwise.
*
* $default can be:
* 1. a callback - which is called and its result
* returned if the Option is a None.
* 2. any other PHP value - which is returned
* in case the Option is a None.
*
* <code>
* $option = Option::create(0);
* $option(1); // 0
* $option(); // 0
*
* $option = Option::none();
* $option(1); // 1
* $option(); // NoneValueException
* </code>
*
* @throws NoneValueException If None without argument is called.
* @param string $default
* @return mixed
*/
public abstract function __invoke($default = null);
}
Option::init();
