Laravel 5.1 + PHPunit - API test returns always invalid argument error foreach

问题

I've upgraded from Laravel 5.0 to 5.1

Test suite works fine and I can run the phpunit command. But, when I'm start to test with the api test, I always get a foreach error.

class ExampleTest extends TestCase {

    public function testLoginCredentials()
    {
        $this->post('/srv/plc/auth/login', ['data' => 'some data'])
        ->seeJson([
            'authorized' => true,
        ]);
    }
}

Above looks like the documentation: http://laravel.com/docs/5.1/testing#testing-json-apis

If I run my test via phpunit, I get the following error:

There was 1 error:

1) ExampleTest::testBasicExample
ErrorException: Invalid argument supplied for foreach()
/Applications/XAMPP/xamppfiles/htdocs/w/server/vendor/framework/src/Illuminate/Support/Arr.php:423
/Applications/XAMPP/xamppfiles/htdocs/w/server/vendor/framework/src/Illuminate/Support/helpers.php:301
/Applications/XAMPP/xamppfiles/htdocs/w/server/vendor/framework/src/Illuminate/Foundation/Testing/CrawlerTrait.php:365
/Applications/XAMPP/xamppfiles/htdocs/whennn/server/vendor/laravel/framework/src/Illuminate/Foundation/Testing/CrawlerTrait.php:352
/Applications/XAMPP/xamppfiles/htdocs/whennn/server/tests/ExampleTest.php:17
/Applications/XAMPP/xamppfiles/lib/php/PHPUnit/TextUI/Command.php:188
/Applications/XAMPP/xamppfiles/lib/php/PHPUnit/TextUI/Command.php:126

FAILURES!
Tests: 1, Assertions: 0, Errors: 1.

If I do a get request with $this->get, I get the same error. Same error with other endpoints.

$this->visit works fine.

回答1:

After a lot of debugging....

seeJson() only accepts an Json array (not Json object)
Foreach error appears when the tested endpoint not returns an array. If there's more than an array, the error appears.

I really don't know why seeJson must be an array.

I expected an 'assertion error', instead of an foreach error

来源：https://stackoverflow.com/questions/31921451/laravel-5-1-phpunit-api-test-returns-always-invalid-argument-error-foreach

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