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Merge pull request #6629 from sushant57/master 

Guide to Guava Multiset
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ashleyfrieze 2019-04-17 21:42:58 +01:00 committed by GitHub
parent a3c1b2a1bd 431670601a
commit e2eb27a5ad
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13
guava-collections-set/.gitignore vendored Normal file
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*.class
#folders#
/target
/neoDb*
/data
/src/main/webapp/WEB-INF/classes
*/META-INF/*
# Packaged files #
*.jar
*.war
*.ear

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guava-collections-set/pom.xml Normal file
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<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.baeldung</groupId>
<artifactId>guava-collections-set</artifactId>
<version>0.1.0-SNAPSHOT</version>
<name>guava-collections-set</name>
<parent>
<groupId>com.baeldung</groupId>
<artifactId>parent-java</artifactId>
<version>0.0.1-SNAPSHOT</version>
<relativePath>../parent-java</relativePath>
</parent>
<dependencies>
<!-- test scoped -->
<dependency>
<groupId>org.assertj</groupId>
<artifactId>assertj-core</artifactId>
<version>${assertj.version}</version>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<finalName>guava-collections-set</finalName>
</build>
<properties>
<!-- util -->
<guava.version>27.1-jre</guava.version>
<!-- testing -->
<assertj.version>3.6.1</assertj.version>
</properties>
</project>

92
guava-collections-set/src/test/java/org/baeldung/guava/GuavaMultiSetUnitTest.java Normal file
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package org.baeldung.guava;
import com.google.common.collect.HashMultiset;
import com.google.common.collect.Multiset;
import org.junit.Test;
import java.util.HashMap;
import java.util.Map;
import static org.assertj.core.api.Assertions.assertThat;
import static org.assertj.core.api.Assertions.assertThatThrownBy;
public class GuavaMultiSetUnitTest {
@Test
public void givenMultiSet_whenAddingValues_shouldReturnCorrectCount() {
Multiset<String> bookStore = HashMultiset.create();
bookStore.add("Potter");
bookStore.add("Potter");
bookStore.add("Potter");
assertThat(bookStore.contains("Potter")).isTrue();
assertThat(bookStore.count("Potter")).isEqualTo(3);
}
@Test
public void givenMultiSet_whenRemovingValues_shouldReturnCorrectCount() {
Multiset<String> bookStore = HashMultiset.create();
bookStore.add("Potter");
bookStore.add("Potter");
bookStore.remove("Potter");
assertThat(bookStore.contains("Potter")).isTrue();
assertThat(bookStore.count("Potter")).isEqualTo(1);
}
@Test
public void givenMultiSet_whenSetCount_shouldReturnCorrectCount() {
Multiset<String> bookStore = HashMultiset.create();
bookStore.setCount("Potter", 50);
assertThat(bookStore.count("Potter")).isEqualTo(50);
}
@Test
public void givenMultiSet_whenSettingNegativeCount_shouldThrowException() {
Multiset<String> bookStore = HashMultiset.create();
assertThatThrownBy(() -> bookStore.setCount("Potter", -1))
.isInstanceOf(IllegalArgumentException.class);
}
@Test
public void givenMultiSet_whenSettingCountWithEmptySet_shouldBeSuccessful() {
Multiset<String> bookStore = HashMultiset.create();
assertThat(bookStore.setCount("Potter", 0, 2)).isTrue();
}
@Test
public void givenMultiSet_whenSettingCountWithCorrectValue_shouldBeSuccessful() {
Multiset<String> bookStore = HashMultiset.create();
bookStore.add("Potter");
bookStore.add("Potter");
assertThat(bookStore.setCount("Potter", 2, 52)).isTrue();
}
@Test
public void givenMultiSet_whenSettingCountWithIncorrectValue_shouldFail() {
Multiset<String> bookStore = HashMultiset.create();
bookStore.add("Potter");
bookStore.add("Potter");
assertThat(bookStore.setCount("Potter", 5, 52)).isFalse();
}
@Test
public void givenMap_compareMultiSetOperations() {
Map<String, Integer> bookStore = new HashMap<>();
bookStore.put("Potter", 3);
assertThat(bookStore.containsKey("Potter")).isTrue();
assertThat(bookStore.get("Potter")).isEqualTo(3);
bookStore.put("Potter", 2);
assertThat(bookStore.get("Potter")).isEqualTo(2);
bookStore.put("Potter", null);
assertThat(bookStore.containsKey("Potter")).isTrue();
bookStore.put("Potter", -1);
assertThat(bookStore.containsKey("Potter")).isTrue();
}
}