How to use computeIfAbsent method of org.assertj.core.test.jdk11.ImmutableCollections class

Best Assertj code snippet using org.assertj.core.test.jdk11.ImmutableCollections.computeIfAbsent

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...645 public V compute(K key, BiFunction<? super K, ? super V, ? extends V> rf) {646 throw uoe();647 }648 @Override649 public V computeIfAbsent(K key, Function<? super K, ? extends V> mf) {650 throw uoe();651 }652 @Override653 public V computeIfPresent(K key, BiFunction<? super K, ? super V, ? extends V> rf) {654 throw uoe();655 }656 @Override657 public V merge(K key, V value, BiFunction<? super V, ? super V, ? extends V> rf) {658 throw uoe();659 }660 @Override661 public V put(K key, V value) {662 throw uoe();663 }...

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computeIfAbsent

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1import org.assertj.core.test.jdk11.ImmutableCollections;2Map<String, Integer> map = new HashMap<>();3map.put("one", 1);4map.put("two", 2);5map.put("three", 3);6Map<String, Integer> immutableMap = ImmutableCollections.computeIfAbsent(map, "four", 4);7Map<String, Integer> map = new HashMap<>();8map.put("one", 1);9map.put("two", 2);10map.put("three", 3);11Map<String, Integer> immutableMap = map.computeIfAbsent("four", k -> 4);12Map<String, Integer> map = new HashMap<>();13map.put("one", 1);14map.put("two", 2);15map.put("three", 3);16Map<String, Integer> immutableMap = map.computeIfAbsent("four", 4);17Map<String, Integer> map = new HashMap<>();18map.put("one", 1);19map.put("two", 2);20map.put("three", 3);21Map<String, Integer> immutableMap = map.computeIfAbsent("four", (Function<String, Integer>)k -> 4);22Map<String, Integer> map = new HashMap<>();23map.put("one", 1);24map.put("two", 2);25map.put("three", 3);26Map<String, Integer> immutableMap = map.computeIfAbsent("four", (Function<String, Integer>)k -> (int)k.charAt(0));

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computeIfAbsent

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1import org.assertj.core.test.jdk11.ImmutableCollections;2import java.util.Map;3import java.util.function.Function;4import static java.util.stream.Collectors.toMap;5import static org.assertj.core.api.Assertions.assertThat;6import static org.assertj.core.test.Maps.mapOf;7import static org.assertj.core.test.Maps.mapOfEntry;8import static org.assertj.core.test.Maps.mapOfEntries;9import static org.assertj.core.test.Maps.mapOfEntriesWithNullValue;10import static org.assertj.core.test.Maps.mapOfWithNullValue;11import static org.assertj.core.test.Maps.mapOfWithNullValues;12import static org.assertj.core.test.Maps.mapOfWithNullValuesInEntry;13import static org.assertj.core.test.Maps.mapOfWithNullValuesInKey;14import static org.assertj.core.test.Maps.mapOfWithNullValuesInValue;15import static org.assertj.core.test.Maps.mapOfWithNullValuesInValueAndKey;16import static org.assertj.core.test.Maps.mapOfWithNullValuesInValueAndNullKey;17import static org.assertj.core.test.Maps.mapOfWithNullValuesInValueAndNullValue;18import static org.assertj.core.test.Maps.mapOfWithNullValuesInValueAndNullValueAndKey;19import static org.assertj.core.test.Maps.mapOfWithTwoNullValuesInValueAndNullValueAndKey;20import static org.assertj.core.test.Maps.mapOfWithTwoNullValuesInValueAndNullValueAndNullKey;21import static org.assertj.core.test.Maps.mapOfWithTwoNullValuesInValueAndNullValueAndNullValue;22import static org.assertj.core.test.Maps.mapOfWithTwoNullValuesInValueAndNullValueAndNullValueAndKey;23import static org.assertj.core.test.Maps.mapOfWithTwoNullValuesInValueAndNullValueAndNullValueAndNullKey;24import static org.assertj.core.test.Maps.mapOfWithTwoNullValuesInValueAndNullValueAndNullValueAndNullValue;25import static org.assertj.core.test.Maps.mapOfWithTwoNullValuesInValueAndNullValueAndNullValueAndNullValueAndKey;26import static org.assertj.core.test.Maps.mapOfWithTwoNullValuesInValueAndNullValueAndNullValueAndNullValueAndNullKey;27import static org.assertj.core.test.Maps.mapOfWithTwoNullValuesInValueAndNullValueAndNullValueAndNullValueAndNullValue;28import static org.assertj.core.test.Maps.mapOfWithTwoNullValuesInValueAnd

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computeIfAbsent

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1package org.assertj.core.test.jdk11;2import static org.assertj.core.api.Assertions.assertThat;3import java.util.List;4import java.util.Map;5import java.util.Set;6import org.junit.jupiter.api.Test;7public class ImmutableCollectionsTest {8 public void should_add_element_if_absent_in_list() {9 List<String> list = List.of("a", "b");10 List<String> listWithElement = list.computeIfAbsent(2, i -> "c");11 assertThat(listWithElement).containsExactly("a", "b", "c");12 }13 public void should_add_element_if_absent_in_set() {14 Set<String> set = Set.of("a", "b");15 Set<String> setWithElement = set.computeIfAbsent("c", s -> "c");16 assertThat(setWithElement).containsExactly("a", "b", "c");17 }18 public void should_add_element_if_absent_in_map() {19 Map<String, String> map = Map.of("a", "a", "b", "b");20 Map<String, String> mapWithElement = map.computeIfAbsent("c", s -> "c");21 assertThat(mapWithElement).containsOnlyKeys("a", "b", "c");22 }23}24package org.assertj.core.test.jdk11;25import static org.assertj.core.api.Assertions.assertThat;26import java.util.List;27import java.util.Map;28import java.util.Set;29import org.junit.jupiter.api.Test;30public class ImmutableCollectionsTest {31 public void should_add_element_if_present_in_list() {32 List<String> list = List.of("a", "b");33 List<String> listWithElement = list.computeIfPresent(0, (i, s) -> "c");34 assertThat(listWithElement).containsExactly("c", "b");35 }36 public void should_add_element_if_present_in_set() {37 Set<String> set = Set.of("a", "b");38 Set<String> setWithElement = set.computeIfPresent("a", (s, s2) -> "c");39 assertThat(setWithElement).containsExactly("c", "b");40 }

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computeIfAbsent

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1import static org.assertj.core.test.jdk11.ImmutableCollections.*;2import java.util.Map;3import java.util.function.Supplier;4import org.assertj.core.api.*;5import org.assertj.core.test.jdk11.ImmutableCollections;6import org.junit.jupiter.api.Test;7public class ImmutableCollectionsTest {8 public void should_create_immutable_map() {9 Map<String, Integer> map = ImmutableCollections.of("one", 1, "two", 2);10 assertThat(map).containsEntry("one", 1);11 assertThat(map).containsEntry("two", 2);12 }13 public void should_create_immutable_map_using_computeIfAbsent() {14 Supplier<Map<String, Integer>> supplier = () -> ImmutableCollections.of("one", 1, "two", 2);15 Map<String, Integer> map = ImmutableCollections.computeIfAbsent("immutableMap", supplier);16 assertThat(map).containsEntry("one", 1);17 assertThat(map).containsEntry("two", 2);18 }19}

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