de.metanome.backend.input.database.ResultSetWithoutRelationNameFixture.java Source code

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Here is the source code for de.metanome.backend.input.database.ResultSetWithoutRelationNameFixture.java

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/**
 * Copyright 2015-2016 by Metanome Project
 *
 * 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 de.metanome.backend.input.database;

import com.google.common.collect.ImmutableList;

import java.sql.ResultSet;
import java.sql.ResultSetMetaData;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;

import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.when;

public class ResultSetWithoutRelationNameFixture {

    public ResultSet getTestData() throws SQLException {
        ResultSet resultSet = mock(ResultSet.class);
        ResultSetMetaData resultSetMetaData = mock(ResultSetMetaData.class);
        // Expected values
        // Expected column count
        when(resultSetMetaData.getColumnCount()).thenReturn(numberOfColumns());
        // Simulate SQLException when starting count at 0.
        when(resultSetMetaData.getTableName(0)).thenThrow(new SQLException());
        // Simulate that JDBC driver is not properly reporting relation names (e.g., Redshift).
        when(resultSetMetaData.getTableName(1)).thenReturn(null);
        ImmutableList<String> expectedColumnNames = getExpectedColumnNames();
        // Simulate SQLException when starting count at 0.
        when(resultSetMetaData.getColumnName(0)).thenThrow(new SQLException());
        for (int i = 0; i < expectedColumnNames.size(); i++) {
            when(resultSetMetaData.getColumnLabel(i + 1)).thenReturn(expectedColumnNames.get(i));
        }
        // Expected values when calling getMetaData
        when(resultSet.getMetaData()).thenReturn(resultSetMetaData);
        // Expected values when calling next
        when(resultSet.next()).thenReturn(false);

        return resultSet;
    }

    public String getExpectedRelationName() {
        return "some_table";
    }

    public ImmutableList<String> getExpectedColumnNames() {
        return ImmutableList.of("column1", "column2", "column3");
    }

    public int numberOfRows() {
        return 0;
    }

    public int numberOfColumns() {
        return 3;
    }

}