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This is a testing support library for DBFlute that helps you to free unit testing from the database. It provides ConditionBean matchers, utilities for mock Behavior and some JUnit helpers.

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/*
 * Copyright 2015 Toshio Takiguchi.
 *
 * 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 org.dbflute.testing.matcher;

import java.util.ArrayList;
import java.util.List;
import java.util.Map;

import org.hamcrest.BaseMatcher;
import org.hamcrest.Description;
import org.hamcrest.Matcher;
import org.seasar.dbflute.cbean.ConditionBean;
import org.seasar.dbflute.cbean.ConditionQuery;
import org.seasar.dbflute.cbean.cvalue.ConditionValue;
import org.seasar.dbflute.dbmeta.DBMeta;
import org.seasar.dbflute.exception.DBMetaNotFoundException;
import org.seasar.dbflute.helper.beans.DfBeanDesc;
import org.seasar.dbflute.helper.beans.factory.DfBeanDescFactory;

/**
 * This is the matcher that gets one {@link ConditionValue} from {@code T}
 * instance for further assertion.
 * 
 * Example:
 * 
{@code
 * MemberCB cb = ...;
 * cb.query().setMemberName_Equal("John Doe");
 *
 * assertThat(cb, hasCondition("memberName", equal("John Doe")));
 * }
 *
 * @param  the type of ConditionBean implementation
 * @author taktos
 *
 */
public class HasCondition extends BaseMatcher {

    protected final String column;
    protected final Matcher matcher;

    public HasCondition(String column, Matcher matcher) {
        this.column = column;
        this.matcher = matcher;
    }

    @Override
    public boolean matches(Object item) {
        if (item == null) {
            return false;
        }
        ConditionValue cv = getConditionValue(item, column);
        return matcher.matches(cv);
    }

    @Override
    public void describeTo(Description description) {
        description.appendText(column + " ");
        description.appendDescriptionOf(matcher);
    }

    @Override
    public void describeMismatch(Object item, Description description) {
        description.appendText(column + " ");
        ConditionValue cv = getConditionValue(item, column);
        matcher.describeMismatch(cv, description);

        List values = new ArrayList();
        flatten(cv.getFixed(), values);
        flatten(cv.getVarying(), values);

        description.appendValueList(". (Actual condition(s): ", ", ", ")", values);
    }

    private void flatten(Map> map, List flatten) {
        if (map == null) {
            return;
        }
        for (Map v : map.values()) {
            for (Map.Entry e : v.entrySet()) {
                flatten.add(e.getKey() + " " + e.getValue());
            }
        }
    }

    private ConditionValue getConditionValue(Object item, String column) {
        try {
            if (item instanceof ConditionBean) {
                return getValue(((ConditionBean) item).localCQ(), column);
            } else if (item instanceof ConditionQuery) {
                return getValue((ConditionQuery) item, column);
            } else {
                throw new IllegalArgumentException("Not a valid argument: " + item);
            }
        } catch (DBMetaNotFoundException e) {
            throw new IllegalArgumentException("Column '" + column + "' does not exist.", e);
        }
    }

    private ConditionValue getValue(ConditionQuery cq, String column) {
        DBMeta meta = MatcherHelper.getDBMeta(cq);
        String columnPropName = meta.findColumnInfo(column).getPropertyName();

        DfBeanDesc beanDesc = DfBeanDescFactory.getBeanDesc(cq.getClass());
        return (ConditionValue) beanDesc.getPropertyDesc(columnPropName).getValue(cq);
    }

    public static  HasCondition hasCondition(String column, Matcher matcher) {
        return new HasCondition(column, matcher);
    }

}