Package org.junit.jupiter.params

Class ParameterizedTestMethodContext

java.lang.Object

org.junit.jupiter.params.ParameterizedTestMethodContext

class ParameterizedTestMethodContext
extends Object

Encapsulates access to the parameters of a parameterized test method and caches the converters and aggregators used to resolve them.

Since:

5.3

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
(package private) static class	ParameterizedTestMethodContext.Aggregator
(package private) static class	ParameterizedTestMethodContext.Converter
(package private) static interface	ParameterizedTestMethodContext.Resolver
(package private) static enum	ParameterizedTestMethodContext.ResolverType

Field Summary

Fields

Modifier and Type	Field	Description
private final Parameter[]	parameters
private final ParameterizedTestMethodContext.Resolver[]	resolvers
private final List<ParameterizedTestMethodContext.ResolverType>	resolverTypes

Constructor Summary

Constructors

Constructor	Description
ParameterizedTestMethodContext(Method testMethod)

Method Summary

Modifier and Type	Method	Description
(package private) int	getParameterCount()	Get the number of parameters of the Method represented by this context.
(package private) Optional<String>	getParameterName(int parameterIndex)	Get the name of the Parameter with the supplied index, if it is present and declared before the aggregators.
private ParameterizedTestMethodContext.Resolver	getResolver(ParameterContext parameterContext)
(package private) boolean	hasAggregator()	Determine if the Method represented by this context declares at least one Parameter that is an aggregator.
(package private) boolean	hasPotentiallyValidSignature()	Determine if the Method represented by this context has a potentially valid signature (i.e., formal parameter declarations) with regard to aggregators.
(package private) int	indexOfFirstAggregator()	Find the index of the first aggregator Parameter in the Method represented by this context.
(package private) boolean	isAggregator(int parameterIndex)	Determine if the Parameter with the supplied index is an aggregator (i.e., of type ArgumentsAccessor or annotated with AggregateWith).
private static boolean	isAggregator(Parameter parameter)	Determine if the supplied Parameter is an aggregator (i.e., of type ArgumentsAccessor or annotated with AggregateWith).
private static ParameterResolutionException	parameterResolutionException(String message, Exception cause, ParameterContext parameterContext)
(package private) Object	resolve(ParameterContext parameterContext, Object[] arguments)	Resolve the parameter for the supplied context using the supplied arguments.

Methods inherited from class java.lang.Object

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

Field Details

parameters

private final Parameter[] parameters

resolvers

private final ParameterizedTestMethodContext.Resolver[] resolvers

resolverTypes

private final List<ParameterizedTestMethodContext.ResolverType> resolverTypes

Constructor Details

ParameterizedTestMethodContext

ParameterizedTestMethodContext(Method testMethod)

Method Details

isAggregator

private 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

hasPotentiallyValidSignature

boolean hasPotentiallyValidSignature()

Determine if the Method represented by this context 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

getParameterCount

int getParameterCount()

Get the number of parameters of the Method represented by this context.

getParameterName

Optional<String> getParameterName(int parameterIndex)

Get the name of the Parameter with the supplied index, if it is present and declared before the aggregators.

Returns:

an Optional containing the name of the parameter

hasAggregator

boolean hasAggregator()

Determine if the Method represented by this context declares at least one Parameter that is an aggregator.

Returns:

true if the method has an aggregator

isAggregator

boolean isAggregator(int parameterIndex)

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

Returns:

true if the parameter is an aggregator

indexOfFirstAggregator

int indexOfFirstAggregator()

Find the index of the first aggregator Parameter in the Method represented by this context.

Returns:

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

resolve

Object resolve(ParameterContext parameterContext,
 Object[] arguments)

Resolve the parameter for the supplied context using the supplied arguments.

getResolver

private ParameterizedTestMethodContext.Resolver getResolver(ParameterContext parameterContext)

parameterResolutionException

private static ParameterResolutionException parameterResolutionException(String message,
 Exception cause,
 ParameterContext parameterContext)