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Merge pull request #2 from sushant57/multi_set 

Multi set
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Kumar Sushant 2019-03-31 16:26:39 +02:00 committed by GitHub
parent 72d62f6b7c 45bf5898d5
commit 50d15c3b0d
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guava-collections/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_whenAddAndRemoveValues_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);
bookStore.remove("Potter");
assertThat(bookStore.contains("Potter")).isTrue();
assertThat(bookStore.count("Potter")).isEqualTo(2);
}
@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_whenSettingCountWithOldCount_shouldReturnCorrectValue() {
Multiset<String> bookStore = HashMultiset.create();
assertThat(bookStore.setCount("Potter", 0, 2)).isTrue();
assertThat(bookStore.setCount("Potter", 50, 5)).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();
}
}