RatioValueTests.java example

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 * 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,
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package org.elasticsearch.common.unit;

import org.elasticsearch.ElasticsearchParseException;
import org.elasticsearch.test.ESTestCase;

import static org.hamcrest.Matchers.is;

/**
 * Tests for the {@link RatioValue} class
 */
public class RatioValueTests extends ESTestCase {
    public void testParsing() {
        assertThat(RatioValue.parseRatioValue("100%").toString(), is("100.0%"));
        assertThat(RatioValue.parseRatioValue("0%").toString(), is("0.0%"));
        assertThat(RatioValue.parseRatioValue("-0%").toString(), is("0.0%"));
        assertThat(RatioValue.parseRatioValue("15.1%").toString(), is("15.1%"));
        assertThat(RatioValue.parseRatioValue("0.1%").toString(), is("0.1%"));
        assertThat(RatioValue.parseRatioValue("1.0").toString(), is("100.0%"));
        assertThat(RatioValue.parseRatioValue("0").toString(), is("0.0%"));
        assertThat(RatioValue.parseRatioValue("-0").toString(), is("0.0%"));
        assertThat(RatioValue.parseRatioValue("0.0").toString(), is("0.0%"));
        assertThat(RatioValue.parseRatioValue("-0.0").toString(), is("0.0%"));
        assertThat(RatioValue.parseRatioValue("0.151").toString(), is("15.1%"));
        assertThat(RatioValue.parseRatioValue("0.001").toString(), is("0.1%"));
    }

    public void testNegativeCase() {
        testInvalidRatio("100.0001%");
        testInvalidRatio("-0.1%");
        testInvalidRatio("1a0%");
        testInvalidRatio("2");
        testInvalidRatio("-0.01");
        testInvalidRatio("0.1.0");
        testInvalidRatio("five");
        testInvalidRatio("1/2");
    }

    public void testInvalidRatio(String r) {
        try {
            RatioValue.parseRatioValue(r);
            fail("Value: [" + r + "] should be an invalid ratio");
        } catch (ElasticsearchParseException e) {
            // success
        }
    }
}