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BAEL-2421

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* Changes for http://jira.baeldung.com/browse/BAEL-2421

* fixed formatting

* Merged the test and main classes as per the suggestion.

* Merged the source code with tests.
This commit is contained in:
Surapaneni Venkata Kiran 2018-12-12 14:19:45 -05:00 committed by Emily Cheyne
parent 743949afe6
commit cb7e515723
1 changed files with 135 additions and 0 deletions
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135
java-strings/src/test/java/com/baeldung/ConvertStringToListUnitTest.java Normal file
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package com.baeldung;
import static org.junit.Assert.assertEquals;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.stream.Collectors;
import java.util.stream.Stream;
import org.apache.commons.lang3.StringUtils;
import org.junit.Test;
import com.google.common.base.Function;
import com.google.common.base.Splitter;
import com.google.common.collect.Lists;
public class ConvertStringToListUnitTest {
private final String countries = "Russia,Germany,England,France,Italy";
private final String ranks = "1,2,3,4,5, 6,7";
private final String emptyStrings = ",,,,,";
private final List<String> expectedCountriesList = Arrays.asList("Russia", "Germany", "England", "France", "Italy");
private final List<Integer> expectedRanksList = Arrays.asList(1, 2, 3, 4, 5, 6, 7);
private final List<String> expectedEmptyStringsList = Arrays.asList("", "", "", "", "", "");
@Test
public void givenString_thenGetListOfStringByJava() {
List<String> convertedCountriesList = Arrays.asList(countries.split(",", -1));
assertEquals(expectedCountriesList, convertedCountriesList);
}
@Test
public void givenString_thenGetListOfStringByApache() {
List<String> convertedCountriesList = Arrays.asList(StringUtils.splitPreserveAllTokens(countries, ","));
assertEquals(expectedCountriesList, convertedCountriesList);
}
@Test
public void givenString_thenGetListOfStringByGuava() {
List<String> convertedCountriesList = Splitter.on(",")
.trimResults()
.splitToList(countries);
assertEquals(expectedCountriesList, convertedCountriesList);
}
@Test
public void givenString_thenGetListOfStringByJava8() {
List<String> convertedCountriesList = Stream.of(countries.split(",", -1))
.collect(Collectors.toList());
assertEquals(expectedCountriesList, convertedCountriesList);
}
@Test
public void givenString_thenGetListOfIntegerByJava() {
String[] convertedRankArray = ranks.split(",");
List<Integer> convertedRankList = new ArrayList<Integer>();
for (String number : convertedRankArray) {
convertedRankList.add(Integer.parseInt(number.trim()));
}
assertEquals(expectedRanksList, convertedRankList);
}
@Test
public void givenString_thenGetListOfIntegerByGuava() {
List<Integer> convertedRankList = Lists.transform(Splitter.on(",")
.trimResults()
.splitToList(ranks), new Function<String, Integer>() {
@Override
public Integer apply(String input) {
return Integer.parseInt(input.trim());
}
});
assertEquals(expectedRanksList, convertedRankList);
}
@Test
public void givenString_thenGetListOfIntegerByJava8() {
List<Integer> convertedRankList = Stream.of(ranks.split(","))
.map(String::trim)
.map(Integer::parseInt)
.collect(Collectors.toList());
assertEquals(expectedRanksList, convertedRankList);
}
@Test
public void givenString_thenGetListOfIntegerByApache() {
String[] convertedRankArray = StringUtils.split(ranks, ",");
List<Integer> convertedRankList = new ArrayList<Integer>();
for (String number : convertedRankArray) {
convertedRankList.add(Integer.parseInt(number.trim()));
}
assertEquals(expectedRanksList, convertedRankList);
}
@Test
public void givenEmptyStrings_thenGetListOfStringByJava() {
List<String> convertedEmptyStringsList = Arrays.asList(emptyStrings.split(",", -1));
assertEquals(expectedEmptyStringsList, convertedEmptyStringsList);
}
@Test
public void givenEmptyStrings_thenGetListOfStringByApache() {
List<String> convertedEmptyStringsList = Arrays.asList(StringUtils.splitPreserveAllTokens(emptyStrings, ","));
assertEquals(expectedEmptyStringsList, convertedEmptyStringsList);
}
@Test
public void givenEmptyStrings_thenGetListOfStringByGuava() {
List<String> convertedEmptyStringsList = Splitter.on(",")
.trimResults()
.splitToList(emptyStrings);
assertEquals(expectedEmptyStringsList, convertedEmptyStringsList);
}
@Test
public void givenEmptyStrings_thenGetListOfStringByJava8() {
List<String> convertedEmptyStringsList = Stream.of(emptyStrings.split(",", -1))
.collect(Collectors.toList());
assertEquals(expectedEmptyStringsList, convertedEmptyStringsList);
}
}