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/*******************************************************************************
 * Copyright (C) 2020, exense GmbH
 *
 * This file is part of STEP
 *
 * STEP is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * STEP is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with STEP.  If not, see .
 ******************************************************************************/
package step.artefacts.handlers.asserts;

public class IsNullOperatorHandler extends AbstractOperatorHandler {

    @Override
    public boolean isActualValueSupported(Object value) {
        return true;
    }

    @Override
    public boolean isExpectedValueSupported(Object expectedValue) {
        // expected value is ignored in 'notNull' operator
        return true;
    }

    @Override
    public AssertResult apply(String key, Object actual, Object expectedValue, boolean negate) {
        AssertResult assertResult = new AssertResult();
        assertResult.setPassed(negate ^ isNull(actual));
        assertResult.setMessage("'" + key + "' expected" + not(negate) + "to be null");
        assertResult.setDescription(key + (negate ? " !" : " ") + "= null");
        return assertResult;
    }
}