services/billing-aws/src/test/java/com/epam/dlab/core/parser/ColumnMetaTest.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one
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 * 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
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
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 * Unless required by applicable law or agreed to in writing,
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package com.epam.dlab.core.parser;

import com.epam.dlab.exceptions.InitializationException;
import com.epam.dlab.model.aws.ReportLine;
import com.google.common.collect.Lists;
import org.junit.Test;

import java.util.List;

import static junit.framework.TestCase.assertEquals;

public class ColumnMetaTest {

	@Test
	public void getColumnIndexByName() throws InitializationException {
		final List<String> columns = Lists.newArrayList("sCol1", "sCol2", "sCol3", "sCol4");

		assertEquals(0, ColumnMeta.getColumnIndexByName("sCol1", columns));
		assertEquals(1, ColumnMeta.getColumnIndexByName("sCol2", columns));
		assertEquals(3, ColumnMeta.getColumnIndexByName("sCol4", columns));

		try {
			ColumnMeta.getColumnIndexByName("NotFound", columns);

			throw new RuntimeException("Test failed");
		} catch (InitializationException e) {
			// OK
		}
	}

	private void checkMapping(ColumnInfo info, String targetColumnName, String sourceColumnName, int
			sourceColumnIndex) {
		assertEquals(targetColumnName, info.targetName);
		assertEquals(sourceColumnName, info.sourceName);
		assertEquals(sourceColumnIndex, info.sourceIndex);
	}

	@Test
	public void create() throws InitializationException {
		final String mapping =
				ColumnMeta.COLUMN_NAMES[0] + "=sCol2;" +
						ColumnMeta.COLUMN_NAMES[1] + "=$1;" +
						ReportLine.FIELD_TAGS + "=sCol4,$3";
		final List<String> columns = Lists.newArrayList("sCol1", "sCol2", "sCol3", "sCol4");
		ColumnMeta meta = new ColumnMeta(mapping, columns);

		assertEquals(4, meta.getSourceColumnNames().size());
		assertEquals("sCol1", meta.getSourceColumnNames().get(0));
		assertEquals("sCol2", meta.getSourceColumnNames().get(1));
		assertEquals("sCol3", meta.getSourceColumnNames().get(2));
		assertEquals("sCol4", meta.getSourceColumnNames().get(3));

		assertEquals(ColumnMeta.COLUMN_NAMES.length + 1, meta.getTargetColumnNames().size());
		assertEquals(ColumnMeta.COLUMN_NAMES[0], meta.getTargetColumnNames().get(0));
		assertEquals("sCol4", meta.getTargetColumnNames().get(ColumnMeta.COLUMN_NAMES.length - 1));
		assertEquals("sCol3", meta.getTargetColumnNames().get(ColumnMeta.COLUMN_NAMES.length));

		assertEquals(ColumnMeta.COLUMN_NAMES.length + 1, meta.getColumnMapping().size());
		checkMapping(meta.getColumnMapping().get(0), ColumnMeta.COLUMN_NAMES[0], "sCol2", 1);
		checkMapping(meta.getColumnMapping().get(1), ColumnMeta.COLUMN_NAMES[1], "sCol1", 0);
		checkMapping(meta.getColumnMapping().get(ColumnMeta.COLUMN_NAMES.length - 1), ColumnMeta
				.COLUMN_NAMES[ColumnMeta.COLUMN_NAMES.length - 1], "sCol4", 3);
		checkMapping(meta.getColumnMapping().get(ColumnMeta.COLUMN_NAMES.length), ColumnMeta.COLUMN_NAMES[ColumnMeta
				.COLUMN_NAMES.length - 1], "sCol3", 2);
	}

}