org.junit.jupiter.params.aggregator

Class AggregationUtils

java.lang.Object

org.junit.jupiter.params.aggregator.AggregationUtils

@API(status=INTERNAL,
     since="5.2")
public class AggregationUtils
extends Object

Collection of utilities for working with aggregating argument consumers in parameterized tests (i.e., parameters of type ArgumentsAccessor or annotated with @AggregateWith).

Since:

5.2

Method Summary

Modifier and Type	Method and Description
static boolean	hasAggregator(Method method) Determine if the supplied Method declares at least one Parameter that is an aggregator.
static boolean	hasPotentiallyValidSignature(Method method) Determine if the supplied Method has a potentially valid signature (i.e., formal parameter declarations) with regard to aggregators.
static int	indexOfFirstAggregator(Method method) Find the index of the first aggregator Parameter in the supplied Method.
static boolean	isAggregator(Parameter parameter) Determine if the supplied Parameter is an aggregator (i.e., of type ArgumentsAccessor or annotated with AggregateWith).

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

hasPotentiallyValidSignature

public static boolean hasPotentiallyValidSignature(Method method)

Determine if the supplied Method has a potentially valid signature (i.e., formal parameter declarations) with regard to aggregators.

This method takes a best-effort approach at enforcing the following policy for parameterized test methods that accept aggregators as arguments.

1. zero or more indexed arguments come first.
2. zero or more aggregators come next.
3. zero or more arguments supplied by other ParameterResolver implementations come last.

Returns:

true if the method has a potentially valid signature

isAggregator

public static boolean isAggregator(Parameter parameter)

Determine if the supplied Parameter is an aggregator (i.e., of type ArgumentsAccessor or annotated with AggregateWith).

Returns:

true if the parameter is an aggregator

hasAggregator

public static boolean hasAggregator(Method method)

Determine if the supplied Method declares at least one Parameter that is an aggregator.

Returns:

true if the method has an aggregator

indexOfFirstAggregator

public static int indexOfFirstAggregator(Method method)

Find the index of the first aggregator Parameter in the supplied Method.

Returns:

the index of the first aggregator, or -1 if not found