Package com.google.common.testing
Class CollectorTester<T extends @Nullable Object,A extends @Nullable Object,R extends @Nullable Object>
java.lang.Object
com.google.common.testing.CollectorTester<T,A,R>
@GwtCompatible
public final class CollectorTester<T extends @Nullable Object,A extends @Nullable Object,R extends @Nullable Object>
extends Object
Tester for
Collector
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
-
Method Summary
Modifier and TypeMethodDescriptionfinal CollectorTester
<T, A, R> expectCollects
(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 extends @Nullable Object,
A extends @Nullable Object, R extends @Nullable Object>
CollectorTester<T, A, R> Creates aCollectorTester
for the specifiedCollector
.static <T extends @Nullable Object,
A extends @Nullable Object, R extends @Nullable Object>
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 Details
-
of
public static <T extends @Nullable Object,A extends @Nullable Object, CollectorTester<T,R extends @Nullable Object> A, ofR> (Collector<T, A, R> collector) Creates aCollectorTester
for the specifiedCollector
. The result of theCollector
will be compared to the expected value usingObject.equals(java.lang.Object)
. -
of
public static <T extends @Nullable Object,A extends @Nullable Object, CollectorTester<T,R extends @Nullable Object> A, ofR> (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
. -
expectCollects
@SafeVarargs @CanIgnoreReturnValue public final CollectorTester<T,A, expectCollectsR> (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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