DistinctByKeepLastGatherer.java

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package com.pivovarit.gatherers;
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import java.util.LinkedHashMap;
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import java.util.Objects;
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import java.util.function.BiConsumer;
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import java.util.function.Function;
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import java.util.function.Supplier;
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import java.util.stream.Gatherer;
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record DistinctByKeepLastGatherer<T, U>(
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  Function<? super T, ? extends U> keyExtractor) implements Gatherer<T, LinkedHashMap<U, T>, T> {
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    DistinctByKeepLastGatherer {
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        Objects.requireNonNull(keyExtractor, "keyExtractor can't be null");
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    }
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    @Override
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    public Supplier<LinkedHashMap<U, T>> initializer() {
19 1 1. initializer : replaced return value with null for com/pivovarit/gatherers/DistinctByKeepLastGatherer::initializer → KILLED
 
        return LinkedHashMap::new;
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    }
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    @Override
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    public Integrator<LinkedHashMap<U, T>, T, T> integrator() {
24 1 1. integrator : replaced return value with null for com/pivovarit/gatherers/DistinctByKeepLastGatherer::integrator → KILLED
 
        return Integrator.ofGreedy((state, element, _) -> {
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            state.put(keyExtractor.apply(element), element);
26 1 1. lambda$integrator$0 : replaced boolean return with false for com/pivovarit/gatherers/DistinctByKeepLastGatherer::lambda$integrator$0 → SURVIVED
 
            return true;
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        });
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    }
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    @Override
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    public BiConsumer<LinkedHashMap<U, T>, Downstream<? super T>> finisher() {
32 1 1. finisher : replaced return value with null for com/pivovarit/gatherers/DistinctByKeepLastGatherer::finisher → KILLED
 
        return (state, downstream) -> {
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            for (T element : state.values()) {
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                downstream.push(element);
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            }
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        };
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    }
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}

Mutations

19

1.1
Location : initializer
Killed by : com.pivovarit.gatherers.blackbox.DistinctByKeepLastTest.[engine:junit-jupiter]/[class:com.pivovarit.gatherers.blackbox.DistinctByKeepLastTest]/[method:shouldDistinctBy()] replaced return value with null for com/pivovarit/gatherers/DistinctByKeepLastGatherer::initializer → KILLED

24

1.1
Location : integrator
Killed by : com.pivovarit.gatherers.blackbox.DistinctByKeepLastTest.[engine:junit-jupiter]/[class:com.pivovarit.gatherers.blackbox.DistinctByKeepLastTest]/[method:shouldDistinctBy()] replaced return value with null for com/pivovarit/gatherers/DistinctByKeepLastGatherer::integrator → KILLED

26

1.1
Location : lambda$integrator$0
Killed by : none replaced boolean return with false for com/pivovarit/gatherers/DistinctByKeepLastGatherer::lambda$integrator$0 → SURVIVED Covering tests

32

1.1
Location : finisher
Killed by : com.pivovarit.gatherers.blackbox.DistinctByKeepLastTest.[engine:junit-jupiter]/[class:com.pivovarit.gatherers.blackbox.DistinctByKeepLastTest]/[method:shouldDistinctBy()] replaced return value with null for com/pivovarit/gatherers/DistinctByKeepLastGatherer::finisher → KILLED

Active mutators

Tests examined


Report generated by PIT 1.17.1