phpunit w/ laravel: missing argument when using providers - php

Question

I'm running PHPUnit w/ Laravel. Here's my test:
class UserTest extends TestCase {
public function testSluggifyReturnsSluggifiedString($originalString, $expectedResult)
{
$url = new User();
$result = $url->sluggify($originalString);
$this->assertEquals($expectedResult, $result);
}
public function providerTestSluggifyReturnsSluggifiedString()
{
return array(
array('This string will be sluggified', 'this-string-will-be-sluggified'),
array('THIS STRING WILL BE SLUGGIFIED', 'this-string-will-be-sluggified'),
array('This1 string2 will3 be 44 sluggified10', 'this1-string2-will3-be-44-sluggified10'),
array('This! #string#$ %$will ()be "sluggified', 'this-string-will-be-sluggified'),
array("Tänk efter nu – förr'n vi föser dig bort", 'tank-efter-nu-forrn-vi-foser-dig-bort'),
array('', '')
);
}
}
As I'm familiarizing myself w/ unit testing, I've simply added the sluggify() function to the bottom of the User class.
I get this error:
There was 1 error:
1) UserTest::testSluggifyReturnsSluggifiedString
ErrorException: Missing argument 1 for UserTest::testSluggifyReturnsSluggifiedString()
If I change the test to define the two arguments (public function testSluggifyReturnsSluggifiedString($originalString='test', $expectedResult='test')) The test runs fine. For some reason it's not reading the provider data.
I suspect this is something about the Laravel setup, but I can't find anything in the docs to point me in the right direction. What am I doing wrong?

Answer 1

From PHPUnit docs on Data Provider:
The data provider method to be used is specified using the #dataProvider annotation.
So you have to add the annotation on top of your test method, for example:
class UserTest extends TestCase {
/**
* #dataProvider providerTestSluggifyReturnsSluggifiedString
*/
public function testSluggifyReturnsSluggifiedString($originalString, $expectedResult)
{
// ...
}
public function providerTestSluggifyReturnsSluggifiedString()
{
// ...
}
}