Add support cookie testing in controller tests

[kenjis]

This PR adds the functionality to test response cookies in controller testing.
See #86.

controller:

        $cookie = [
            'name'   => 'The-Cookie-Name',
            'value'  => 'The Value',
            'expire' => '86500',
            'domain' => '.some-domain.com',
            'path'   => '/',
            'prefix' => 'myprefix_',
            'secure' => TRUE
        ];
        $this->input->set_cookie($cookie);

You can assert the cookie value.

test code:

        $output = $this->request('GET', 'set_cookie/all_params');
        $this->assertResponseCookie(
            'myprefix_The-Cookie-Name', 'The Value'
        );

You can also assert more cookie params.

test code:

        $cookie = [
            'value'  => 'The Value',
            'domain' => '.some-domain.com',
            'path'   => '/',
            'secure' => TRUE,
            'httponly' => FALSE,
        ];
        $this->assertResponseCookie(
            'myprefix_The-Cookie-Name', $cookie
        );

[esetnik]

@kenjis it's working well for me. I did notice that the PR is failing tests due to CI_Input::post() expected to be invoked 1 times, but invoked 0 times.

I'm getting the same error in my tests when I try to use $this->verifyInvokedOnce() but it's not specific to this PR it also fails with that error on v0.10.1

[kenjis]

Thank you.

Yes, I have to check the test. I will look into it.
Actually, all the tests pass on my Mac OS X.

[kenjis]

@esetnik

I'm getting the same error in my tests when I try to use $this->verifyInvokedOnce() but it's not specific to this PR it also fails with that error on v0.10.1

The error with this PR is using MonkeyPatch::verifyInvokedOnce(), not $this->verifyInvokedOnce().
And $this->verifyInvokedOnce() is just a wrapper to method of PHPUnit mock object.
I think your error has nothing to do with the error.

[kenjis]

All tests pass on my Linux...

[kenjis]

I was able to reproduce the fail. It seems there is a bug in build process for travis-ci.

[kenjis]

No, it is a bug in Monkey Patching.