class PrepareExecutionMetadataStateTest

class PrepareExecutionMetadataStateTest extends RulesEntityIntegrationTestBase {
    
    /**
     * Tests that a variable can be added by an action and is then available.
     */
    public function testAddingVariable() {
        $rule = $this->rulesExpressionManager
            ->createRule();
        $rule->addAction('rules_variable_add', ContextConfig::create()->setValue('type', 'string')
            ->setValue('value', '')
            ->provideAs('variable_added', 'result'));
        $state = ExecutionMetadataState::create();
        $found = $rule->prepareExecutionMetadataState($state);
        $this->assertTrue($state->hasDataDefinition('result'));
        $this->assertNull($found);
    }
    
    /**
     * Tests partial state setup until an expression is reached in the tree.
     */
    public function testPreparingUntil() {
        // Setup a rule with 2 actions.
        $rule = $this->rulesExpressionManager
            ->createRule();
        $rule->addAction('rules_variable_add', ContextConfig::create()->setValue('type', 'string')
            ->setValue('value', '')
            ->provideAs('variable_added', 'result1'));
        $second_action = $this->rulesExpressionManager
            ->createAction('rules_variable_add')
            ->setConfiguration(ContextConfig::create()->setValue('type', 'string')
            ->setValue('value', '')
            ->provideAs('variable_added', 'result2')
            ->toArray());
        $rule->addExpressionObject($second_action);
        $state = ExecutionMetadataState::create();
        // Preparing the state until the second action means the variable of the
        // first action is available, but the second is not yet.
        $found = $rule->prepareExecutionMetadataState($state, $second_action);
        $this->assertTrue($state->hasDataDefinition('result1'));
        $this->assertFalse($state->hasDataDefinition('result2'));
        $this->assertTrue($found);
    }
    
    /**
     * Tests that state preparation also works for actions in a loop.
     */
    public function testPrepareInLoop() {
        $rule = $this->rulesExpressionManager
            ->createRule();
        $loop = $this->rulesExpressionManager
            ->createInstance('rules_loop', [
            'list' => 'string_list',
        ]);
        $action = $this->rulesExpressionManager
            ->createAction('rules_test_string')
            ->setConfiguration(ContextConfig::create()->setValue('text', 'x')
            ->toArray());
        $loop->addExpressionObject($action);
        $rule->addExpressionObject($loop);
        $state = RulesComponent::create($rule)->addContextDefinition('string_list', ContextDefinition::create('string')->setMultiple())
            ->getMetadataState();
        $found = $rule->prepareExecutionMetadataState($state, $action);
        $this->assertTrue($state->hasDataDefinition('list_item'));
        $this->assertTrue($found);
    }
    
    /**
     * Tests that the loop list item is removed after the loop.
     */
    public function testPrepareAfterLoop() {
        $rule = $this->rulesExpressionManager
            ->createRule();
        $loop = $this->rulesExpressionManager
            ->createInstance('rules_loop', [
            'list' => 'string_list',
        ]);
        $action = $this->rulesExpressionManager
            ->createAction('rules_test_string')
            ->setConfiguration(ContextConfig::create()->setValue('text', 'x')
            ->toArray());
        $loop->addExpressionObject($action);
        $rule->addExpressionObject($loop);
        $state = RulesComponent::create($rule)->addContextDefinition('string_list', ContextDefinition::create('string')->setMultiple())
            ->getMetadataState();
        $found = $rule->prepareExecutionMetadataState($state);
        $this->assertFalse($state->hasDataDefinition('list_item'));
        $this->assertNull($found);
    }

}