An experiment allows us to implement our code in a new way without
risking the introduction of bugs or regressions.
/**
* Run an experiment.
*
* @param \Scientist\Experiment $experiment
*
* @return mixed
*/
public function runExperiment(Experiment $experiment)
{
if ($experiment->shouldRun()) {
$report = $this->getReport($experiment);
return $report->getControl()->getValue();
}
return call_user_func_array($experiment->getControl(), $experiment->getParams());
}
/**
* Run trial callbacks and record their execution state.
*
* @param \Scientist\Experiment $experiment
*
* @return \Scientist\Result[]
*/
protected function runTrials(Experiment $experiment)
{
$executions = [];
foreach ($experiment->getTrials() as $name => $trial) {
$executions[$name] = (new Machine($trial, $experiment->getParams(), true))->execute();
}
return $executions;
}
/**
* Run trial callbacks and record their execution state.
*
* @param \Scientist\Experiment $experiment
* @param \Scientist\Execution $control
*
* @return array
*/
protected function runTrials(Experiment $experiment, Execution $control)
{
$executions = [];
foreach ($experiment->getTrials() as $name => $trial) {
$executions[$name] = $this->executeCallback($trial, $experiment->getParams(), $experiment->getMatcher(), $control);
}
return $executions;
}
public function test_that_running_experiment_with_no_laboratory_executes_control()
{
$e = new Experiment('test experiment');
$e->control(function () {
return 'foo';
});
$v = $e->run();
$this->assertEquals('foo', $v);
}
public function test_that_intern_can_match_and_mismatch_control_and_trial()
{
$i = new Intern();
$e = new Experiment('test experiment', new Laboratory());
$e->control(function () {
return 'foo';
});
$e->trial('bar', function () {
return 'foo';
});
$e->trial('baz', function () {
return 'baz';
});
$v = $i->run($e);
$this->assertInstanceOf('\\Scientist\\Report', $v);
$this->assertTrue($v->getTrial('bar')->isMatch());
$this->assertFalse($v->getTrial('baz')->isMatch());
}
public function test_that_an_experiment_matcher_can_be_set()
{
$e = new Experiment('test experiment');
$e->matcher(new StandardMatcher());
$this->assertInstanceOf(StandardMatcher::class, $e->getMatcher());
}