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BAEL-2514 - Added unit tests for multiple values

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This commit is contained in:
Juan Vaccari 2019-01-23 19:07:06 +00:00
parent f4871c9c57
commit 04626e522a
1 changed files with 26 additions and 0 deletions
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26
java-streams/src/test/java/com/baeldung/stream/StreamMapUnitTest.java
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@ -4,10 +4,13 @@ import org.junit.Before;
import org.junit.Test; import org.junit.Test;
import java.util.HashMap; import java.util.HashMap;
import java.util.List;
import java.util.Map; import java.util.Map;
import java.util.Optional; import java.util.Optional;
import java.util.stream.Collectors;
import static org.junit.Assert.assertEquals; import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;
public class StreamMapUnitTest { public class StreamMapUnitTest {
@ -62,4 +65,27 @@ public class StreamMapUnitTest {
assertEquals(null, isbn); assertEquals(null, isbn);
} }
@Test
public void whenMultipleResultsVersionCalledForExistingTitle_aCollectionWithMultipleValuesIsReturned() {
books.put("978-0321356680", "Effective Java: Second Edition");
List<String> isbnCodes = books.entrySet().stream()
.filter(e -> e.getValue().startsWith("Effective Java"))
.map(Map.Entry::getKey)
.collect(Collectors.toList());
assertTrue(isbnCodes.contains("978-0321356680"));
assertTrue(isbnCodes.contains("978-0134685991"));
}
@Test
public void whenMultipleResultsVersionCalledForNonExistingTitle_aCollectionWithNoValuesIsReturned() {
List<String> isbnCodes = books.entrySet().stream()
.filter(e -> e.getValue().startsWith("Spring"))
.map(Map.Entry::getKey)
.collect(Collectors.toList());
assertTrue(isbnCodes.isEmpty());
}
} }