/**
 * Copyright (C) 2014 Xillio (support@xillio.com)
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *         http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package nl.xillio.xill.plugins.testing.constructs;


import nl.xillio.xill.api.components.MetaExpression;
import nl.xillio.xill.api.construct.Argument;
import nl.xillio.xill.api.construct.Construct;
import nl.xillio.xill.api.construct.ConstructContext;
import nl.xillio.xill.api.construct.ConstructProcessor;
import nl.xillio.xill.api.errors.RobotRuntimeException;

/**
 * This construct checks for equality and throws an error if true.
 *
 * @author Thomas Biesaart
 */
public class IsTrueConstruct extends Construct {
    @Override
    public ConstructProcessor prepareProcess(ConstructContext context) {
        return new ConstructProcessor(
                this::process,
                new Argument("value"),
                new Argument("message", NULL)
        );
    }

    MetaExpression process(MetaExpression value, MetaExpression message) {
        if (value.getBooleanValue()) {
            return NULL;
        }

        String containedMessage = message.isNull() ? "" : ": " + message.getStringValue();

        throw new RobotRuntimeException("Assertion failed. Found [" + value.getStringValue() + "] but expected a true expression" + containedMessage);
    }
}
