/*
 * Copyright (c) 2008-2017, Hazelcast, Inc. All Rights Reserved.
 *
 * 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 com.hazelcast.query.impl.predicates;

import com.hazelcast.spi.properties.HazelcastProperties;
import com.hazelcast.spi.properties.HazelcastProperty;
import com.hazelcast.test.HazelcastParallelClassRunner;
import com.hazelcast.test.annotation.ParallelTest;
import com.hazelcast.test.annotation.QuickTest;
import org.junit.Test;
import org.junit.experimental.categories.Category;
import org.junit.runner.RunWith;

import static com.hazelcast.spi.properties.GroupProperty.QUERY_OPTIMIZER_TYPE;
import static org.hamcrest.Matchers.instanceOf;
import static org.junit.Assert.assertThat;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.when;

@RunWith(HazelcastParallelClassRunner.class)
@Category({QuickTest.class, ParallelTest.class})
public class QueryOptimizerFactoryTest {

    @Test(expected = IllegalArgumentException.class)
    public void newOptimizer_whenUnknownValue_thenThrowIllegalArgumentException() {
        HazelcastProperties hazelcastProperties = createMockHazelcastProperties(QUERY_OPTIMIZER_TYPE, "foo");
        QueryOptimizerFactory.newOptimizer(hazelcastProperties);
    }

    @Test
    public void newOptimizer_whenPropertyContainsRule_thenCreateRulesBasedOptimizer() {
        HazelcastProperties hazelcastProperties = createMockHazelcastProperties(QUERY_OPTIMIZER_TYPE, "RULES");
        QueryOptimizer queryOptimizer = QueryOptimizerFactory.newOptimizer(hazelcastProperties);

        assertThat(queryOptimizer, instanceOf(RuleBasedQueryOptimizer.class));
    }

    @Test
    public void newOptimizer_whenPropertyContainsNone_thenCreateEmptyOptimizer() {
        HazelcastProperties hazelcastProperties = createMockHazelcastProperties(QUERY_OPTIMIZER_TYPE, "NONE");
        QueryOptimizer queryOptimizer = QueryOptimizerFactory.newOptimizer(hazelcastProperties);

        assertThat(queryOptimizer, instanceOf(EmptyOptimizer.class));
    }

    private HazelcastProperties createMockHazelcastProperties(HazelcastProperty property, String stringValue) {
        HazelcastProperties properties = mock(HazelcastProperties.class);
        when(properties.getString(property)).thenReturn(stringValue);
        return properties;
    }
}