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BAEL-5785 Map.of() vs Map.ofEntries() test (#13064) 

* BAEL-5785 Map.of() vs Map.ofEntries() test

* Update pom.xml

* Update pom.xml

* Add immutable test case

* Update map naming
This commit is contained in:
Kilian Schneider 2022-11-29 03:33:35 +01:00 committed by GitHub
parent 28c0b9569e
commit 4d330a1b85
4 changed files with 65 additions and 1 deletions
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12
core-java-modules/core-java-collections-maps-5/pom.xml
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@ -5,6 +5,18 @@
<modelVersion>4.0.0</modelVersion>
<artifactId>core-java-collections-maps-5</artifactId>
<version>0.1.0-SNAPSHOT</version>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<configuration>
<source>9</source>
<target>9</target>
</configuration>
</plugin>
</plugins>
</build>
<name>core-java-collections-maps-5</name>
<packaging>jar</packaging>

52
core-java-modules/core-java-collections-maps-5/src/test/java/com/baeldung/map/mapofvsmapofentries/MapOfEntriesVsMapOfUnitTest.java Normal file
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@ -0,0 +1,52 @@
package com.baeldung.map.mapofvsmapofentries;
import org.junit.jupiter.api.Test;
import java.util.Map;
import static org.assertj.core.api.AssertionsForClassTypes.assertThat;
import static org.junit.jupiter.api.Assertions.assertNotNull;
public class MapOfEntriesVsMapOfUnitTest {
@Test
void mapOf() {
// Use Map.of() to create an empty immutable map
Map<Long, String> map = Map.of();
assertNotNull(map);
// Use Map.of() to create an immutable map with one entry
Map<Long, String> mapWithEntry = Map.of(1L, "value1");
assertNotNull(mapWithEntry);
assertThat(mapWithEntry.size()).isEqualTo(1);
assertThat(mapWithEntry.get(1L)).isEqualTo("value1");
// Test if map is immutable
try {
mapWithEntry.put(2L, "value2");
} catch (UnsupportedOperationException e) {
assertThat(e).isInstanceOf(UnsupportedOperationException.class);
}
}
@Test
void mapOfEntries() {
// Use Map.ofEntries() to create an empty immutable map
Map<Long, String> map = Map.ofEntries();
assertNotNull(map);
// Use Map.ofEntries() to create an immutable map with two entries.
Map<Long, String> longUserMap = Map.ofEntries(Map.entry(1L, "User A"), Map.entry(2L, "User B"));
assertNotNull(longUserMap);
assertThat(longUserMap.size()).isEqualTo(2);
assertThat(longUserMap.get(1L)).isEqualTo("User A");
assertThat(longUserMap.get(2L)).isEqualTo("User B");
// Test if map is immutable
try {
longUserMap.put(3L, "User C");
} catch (UnsupportedOperationException e) {
assertThat(e).isInstanceOf(UnsupportedOperationException.class);
}
}
}

1
core-java-modules/pom.xml
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@ -41,7 +41,6 @@
<module>core-java-collections-maps</module>
<module>core-java-collections-maps-2</module>
<module>core-java-collections-maps-3</module>
<module>core-java-collections-maps-5</module>
<module>core-java-concurrency-2</module>
<module>core-java-concurrency-advanced</module>
<module>core-java-concurrency-advanced-2</module>

1
pom.xml
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@ -1129,6 +1129,7 @@
<module>core-java-modules/core-java-collections-set</module>
<module>core-java-modules/core-java-collections-list-4</module>
<module>core-java-modules/core-java-collections-maps-4</module>
<module>core-java-modules/core-java-collections-maps-5</module>
<module>core-java-modules/core-java-concurrency-simple</module>
<module>core-java-modules/core-java-date-operations-1</module>
<module>core-java-modules/core-java-datetime-conversion</module>