/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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
 * <p>
 * http://www.apache.org/licenses/LICENSE-2.0
 * <p>
 * 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.apache.atlas.ha;

import org.apache.atlas.AtlasConstants;
import org.apache.atlas.AtlasException;
import org.apache.commons.configuration.Configuration;
import org.mockito.Mock;
import org.mockito.MockitoAnnotations;
import org.testng.annotations.BeforeMethod;
import org.testng.annotations.Test;

import static org.mockito.Mockito.when;
import static org.testng.Assert.assertEquals;
import static org.testng.Assert.fail;

public class AtlasServerIdSelectorTest {
    @Mock
    private Configuration configuration;

    @BeforeMethod
    public void setup() {
        MockitoAnnotations.initMocks(this);
        System.setProperty(AtlasConstants.SYSTEM_PROPERTY_APP_PORT, AtlasConstants.DEFAULT_APP_PORT_STR);
    }

    @Test
    public void testShouldSelectRightServerAddress() throws AtlasException {
        when(configuration.getStringArray(HAConfiguration.ATLAS_SERVER_IDS)).thenReturn(new String[] {"id1", "id2"});
        when(configuration.getString(HAConfiguration.ATLAS_SERVER_ADDRESS_PREFIX + "id1")).thenReturn("127.0.0.1:31000");
        when(configuration.getString(HAConfiguration.ATLAS_SERVER_ADDRESS_PREFIX + "id2")).thenReturn("127.0.0.1:21000");

        String atlasServerId = AtlasServerIdSelector.selectServerId(configuration);

        assertEquals(atlasServerId, "id2");
    }

    @Test(expectedExceptions = AtlasException.class)
    public void testShouldFailIfNoIDsConfiguration() throws AtlasException {
        when(configuration.getStringArray(HAConfiguration.ATLAS_SERVER_IDS)).thenReturn(new String[] {});

        AtlasServerIdSelector.selectServerId(configuration);

        fail("Should not return any server id if IDs not found in configuration");
    }

    @Test(expectedExceptions = AtlasException.class)
    public void testShouldFailIfNoMatchingAddressForID() throws AtlasException {
        when(configuration.getStringArray(HAConfiguration.ATLAS_SERVER_IDS)).thenReturn(new String[] {"id1", "id2"});
        when(configuration.getString(HAConfiguration.ATLAS_SERVER_ADDRESS_PREFIX + "id1")).thenReturn("127.0.0.1:31000");

        AtlasServerIdSelector.selectServerId(configuration);

        fail("Should not return any server id if no matching address found for any ID");
    }
}
