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This commit is for the article BAEL-6792 (#14512) 

This commit aims to add a test class namely (StringToMapUnitTest) that tests the conversion of string and string array into map.
This commit is contained in:
Mo Helmy 2023-08-02 20:42:36 +03:00 committed by GitHub
parent d4fec3ad45
commit f7998fa4fa
1 changed files with 89 additions and 0 deletions
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core-java-modules/core-java-collections-maps-6/src/test/java/com/baeldung/strringtomap/StringToMapUnitTest.java Normal file
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package com.baeldung.stringtomap;
import org.junit.Test;
import java.util.*;
import static org.junit.Assert.assertEquals;
public class StringToMapUnitTest {
public Map<String, String> convertStringToMap(String data) {
Map<String, String> map = new HashMap<>();
StringTokenizer tokenizer = new StringTokenizer(data, " ");
while (tokenizer.hasMoreTokens()) {
String token = tokenizer.nextToken();
String[] keyValue = token.split("=");
map.put(keyValue[0], keyValue[1]);
}
return map;
}
@Test
public void given_StringWithKeyValuePairs_whenUsing_convertStringToMap_thenMapCreated() {
String data = "name=John age=30 city=NewYork";
Map<String, String> expectedMap = new HashMap<>();
expectedMap.put("name", "John");
expectedMap.put("age", "30");
expectedMap.put("city", "NewYork");
Map<String, String> resultMap = convertStringToMap(data);
assertEquals(expectedMap, resultMap);
}
public Map<String, String> convertStringArrayToMap(String[] data) {
Map<String, String> map = new HashMap<>();
for (String keyValue : data) {
String[] parts = keyValue.split("=");
map.put(parts[0], parts[1]);
}
return map;
}
@Test
public void given_StringArrayWithKeyValuePairs_whenUsing_convertStringArrayToMap_thenMapCreated() {
String[] data = {"name=John", "age=30", "city=NewYork"};
Map<String, String> expectedMap = new HashMap<>();
expectedMap.put("name", "John");
expectedMap.put("age", "30");
expectedMap.put("city", "NewYork");
Map<String, String> resultMap = convertStringArrayToMap(data);
assertEquals(expectedMap, resultMap);
}
public Map<String, List<String>> convertStringArrayToMapWithDuplicates(String[] data) {
Map<String, List<String>> map = new HashMap<>();
for (String keyValue : data) {
String[] parts = keyValue.split("=");
String key = parts[0];
String value = parts[1];
if (map.containsKey(key)) {
List<String> valuesList = map.get(key);
valuesList.add(value);
} else {
List<String> valuesList = new ArrayList<>();
valuesList.add(value);
map.put(key, valuesList);
}
}
return map;
}
@Test
public void given_StringArrayWithKeyValuePairsWithDuplicates_whenUsing_convertStringArrayToMapWithDuplicates_thenMapCreatedWithLists() {
String[] data = {"name=John", "age=30", "city=NewYork", "age=31"};
Map<String, List<String>> expectedMap = new HashMap<>();
expectedMap.put("name", Collections.singletonList("John"));
expectedMap.put("age", Arrays.asList("30", "31"));
expectedMap.put("city", Collections.singletonList("NewYork"));
Map<String, List<String>> resultMap = convertStringArrayToMapWithDuplicates(data);
assertEquals(expectedMap, resultMap);
}
}