/**
* Injecting!
*
* We can now inject our own instance of a TwitterFeedReader
* class into our SocialFeed from the test. The test will still
* fail, but we are a step closer.
*
* Switch to part four so that we can finally this test to
* pass.
*/
public function testCanReturnAnArrayOfStatusUpdates()
{
$t = new TwitterFeedReader();
$s = new SocialFeed($t);
$v = $s->getArray();
$this->assertCount(5, $v);
}
/**
* Let's test that messages are returned.
*/
public function testCanReturnAnArrayOfStatusUpdates()
{
$f = M::mock('Example\\FeedReaders\\FeedReaderInterface');
$f->shouldReceive('getMessages')->once()->andReturn(array('foo', 'bar', 'baz', 'boo', 'bop'));
$s = new SocialFeed($f);
$v = $s->getArray();
$this->assertCount(5, $v);
$this->assertEquals($v[0], 'foo');
$this->assertEquals($v[1], 'bar');
$this->assertEquals($v[2], 'baz');
$this->assertEquals($v[3], 'boo');
$this->assertEquals($v[4], 'bop');
}
/**
* Bang!
*
* Oh dear, our test is failing because the Twitter
* API is "down".
*
* We have a bigger problem though! Our SocialFeed class
* is responsible for interacting with the Twitter API
* and formatting/retrieving status updates. Each class
* should have a SINGLE RESPONSIBILITY. We can't test
* these classes in isolation because they are too
* tightly coupled. If one class fails, then so will
* the other.
*
* We can fix this! Switch to part two.
*/
public function testCanReturnAnArrayOfStatusUpdates()
{
$s = new SocialFeed();
$v = $s->getArray();
$this->assertCount(5, $v);
}
/**
* Dumb.
*
* Okay, so we can still pass an integer into our
* Social Feed instance. However, because we have
* type-hinted our dependency, we receive a more
* informative wrist-slapping.
*
* The test will still fail though, so we will
* remove this test in the next example.
*
* In the next part, let's use our imagination a
* little. Let's imagine that we need to switch
* our status message source from Twitter to
* Facebook.
*
* Well, what are you waiting for?
*/
public function testThatWeCanBeACompleteIdiot()
{
$s = new SocialFeed(4);
$v = $s->getArray();
$this->assertCount(5, $v);
}