public function testReturnsNullWhenNonResolve()
{
$called = [];
$a = function () use(&$called) {
$called[] = 'a';
};
$b = function () use(&$called) {
$called[] = 'b';
};
$c = function () use(&$called) {
$called[] = 'c';
};
$comp = Utils::orFn($a, $b, $c);
$this->assertNull($comp());
$this->assertEquals(['a', 'b', 'c'], $called);
}
/**
* Create a default credential provider that first checks for environment
* variables, then checks for the "default" profile in ~/.Vws/credentials,
* and finally checks for credentials using EC2 instance profile
* credentials.
*
* @param array $config Optional array of instance profile credentials
* provider options.
*
* @return callable
*/
public static function defaultProvider(array $config = [])
{
return Utils::orFn(self::env(), self::ini());
}