public function testComposerHasInstaller()
{
$config = $this->getComposerDefinition();
$this->assertTrue(isset($config['autoload']['psr-4']['ExpressiveInstaller\\']));
$this->assertTrue(isset($config['autoload-dev']['psr-4']['ExpressiveInstallerTest\\']));
$this->assertTrue(isset($config['extra']['branch-alias']));
$this->assertFalse(isset($config['extra']['optional-packages']));
$this->assertTrue(isset($config['scripts']['pre-install-cmd']));
$this->assertTrue(isset($config['scripts']['pre-update-cmd']));
}