Package com.google.common.testing
Class CollectorTester<T,A,R>
- java.lang.Object
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- com.google.common.testing.CollectorTester<T,A,R>
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@Beta @GwtCompatible public final class CollectorTester<T,A,R> extends Object
Tester forCollector
implementations.Example usage:
CollectorTester.of(Collectors.summingInt(Integer::parseInt)) .expectCollects(3, "1", "2") .expectCollects(10, "1", "4", "3", "2") .expectCollects(5, "-3", "0", "8");
- Since:
- 21.0
- Author:
- Louis Wasserman
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Method Summary
All Methods Static Methods Instance Methods Concrete Methods Modifier and Type Method Description CollectorTester<T,A,R>
expectCollects(@Nullable R expectedResult, T... inputs)
Verifies that the specified expected result is always produced by collecting the specified inputs, regardless of how the elements are divided.static <T,A,R>
CollectorTester<T,A,R>of(Collector<T,A,R> collector)
Creates aCollectorTester
for the specifiedCollector
.static <T,A,R>
CollectorTester<T,A,R>of(Collector<T,A,R> collector, BiPredicate<? super R,? super R> equivalence)
Creates aCollectorTester
for the specifiedCollector
.
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Method Detail
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of
public static <T,A,R> CollectorTester<T,A,R> of(Collector<T,A,R> collector)
Creates aCollectorTester
for the specifiedCollector
. The result of theCollector
will be compared to the expected value usingObject.equals
.
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of
public static <T,A,R> CollectorTester<T,A,R> of(Collector<T,A,R> collector, BiPredicate<? super R,? super R> equivalence)
Creates aCollectorTester
for the specifiedCollector
. The result of theCollector
will be compared to the expected value using the specifiedequivalence
.
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expectCollects
@SafeVarargs public final CollectorTester<T,A,R> expectCollects(@Nullable R expectedResult, T... inputs)
Verifies that the specified expected result is always produced by collecting the specified inputs, regardless of how the elements are divided.
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