Can I mock an interface implementation with PHPUnit?
I've got an interface I'd like to mock. I know I can mock an implementation of that interface, but is there a way to just mock the interface?
<?php
require __DIR__ . '/../vendor/autoload.php';
use My\Http\IClient as IHttpClient; // The interface
use My\SomethingElse\Client as SomethingElseClient;
class SomethingElseClientTest extends PHPUnit_Framework_TestCase {
public function testPost() {
$url = 'some_url';
$http_client = $this->getMockBuilder('Cpm\Http\IClient');
$something_else = new SomethingElseClient($http_client, $url);
}
}
What I get here is:
1) SomethingElseTest::testPost
Argument 1 passed to Cpm\SomethingElse\Client::__construct() must be an instance of
My\Http\IClient, instance of PHPUnit_Framework_MockObject_MockBuilder given, called in
$PATH_TO_PHP_TEST_FILE on line $NUMBER and defined
Interestingly, PHPUnit, mocked interfaces, and instanceof would suggest this might work.
Solution 1:
Instead of
$http_client = $this->getMockBuilder(Cpm\Http\IClient::class);
use
$http_client = $this->getMock(Cpm\Http\IClient::class);
or
$http_client = $this->getMockBuilder(Cpm\Http\IClient::class)->getMock();
Totally works!
Solution 2:
The following works for me:
$myMockObj = $this->createMock(MyInterface::class);
Solution 3:
$http_client = $this->getMockBuilder(Cpm\Http\IClient::class)
->setMockClassName('SomeClassName')
->getMock();
The setMockClassName() can be used to fix this in some circumstances.