Braintree\SubscriptionSearch::inTrialPeriod PHP Method

    public static function inTrialPeriod()
    {
        return new MultipleValueNode('in_trial_period', [true, false]);
    }

 public function testSearch_inTrialPeriod()
 {
     $creditCard = SubscriptionHelper::createCreditCard();
     $triallessPlan = SubscriptionHelper::triallessPlan();
     $trialPlan = SubscriptionHelper::trialPlan();
     $trialSubscription = Braintree\Subscription::create(['paymentMethodToken' => $creditCard->token, 'planId' => $trialPlan['id'], 'price' => '1'])->subscription;
     $triallessSubscription = Braintree\Subscription::create(['paymentMethodToken' => $creditCard->token, 'planId' => $triallessPlan['id'], 'price' => '1'])->subscription;
     $subscriptions_in_trial = Braintree\Subscription::search([Braintree\SubscriptionSearch::inTrialPeriod()->is(true)]);
     $this->assertTrue(Test\Helper::includes($subscriptions_in_trial, $trialSubscription));
     $this->assertFalse(Test\Helper::includes($subscriptions_in_trial, $triallessSubscription));
     $subscriptions_not_in_trial = Braintree\Subscription::search([Braintree\SubscriptionSearch::inTrialPeriod()->is(false)]);
     $this->assertTrue(Test\Helper::includes($subscriptions_not_in_trial, $triallessSubscription));
     $this->assertFalse(Test\Helper::includes($subscriptions_not_in_trial, $trialSubscription));
 }