Interface Arguments

All Known Implementing Classes:

Arguments.ArgumentSet

Functional Interface:

This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.

@FunctionalInterface
@API(status=STABLE,
     since="5.7")
public interface Arguments

Arguments is an abstraction that provides access to an array of objects to be used for invoking a @ParameterizedTest method.

A Stream of such Arguments will typically be provided by an ArgumentsProvider.

Since:

5.0

See Also:

• Arguments.ArgumentSet
• ParameterizedTest
• ArgumentsSource
• ArgumentsProvider
• ArgumentConverter

API Note:

This interface is specifically designed as a simple holder of arguments for a parameterized test. Therefore, if you end up transforming or filtering the arguments, you should consider using one of the following in intermediate steps:

• The standard Java collections
• Tuples from third-party libraries — for example, Commons Lang or javatuples
• Your own data class

Alternatively, you can use an ArgumentConverter to convert some of the arguments from one type to another.

Nested Class Summary

Nested Classes

Modifier and Type	Interface	Description
static final class	Arguments.ArgumentSet	Specialization of Arguments that associates a name with a set of arguments.

Method Summary

Modifier and Type	Method	Description
static Arguments	arguments(@Nullable Object... arguments)	Factory method for creating an instance of Arguments based on the supplied arguments.
static Arguments.ArgumentSet	argumentSet(String name, @Nullable Object... arguments)	Factory method for creating an Arguments.ArgumentSet based on the supplied name and arguments.
@Nullable Object[]	get()	Get the arguments used for an invocation of the @ParameterizedTest method.
static Arguments	of(@Nullable Object... arguments)	Factory method for creating an instance of Arguments based on the supplied arguments.

Method Details

get

@Nullable Object[] get()

Get the arguments used for an invocation of the @ParameterizedTest method.

Returns:

the arguments; never null but may contain null

API Note:

If you need a type-safe way to access some or all of the arguments, please read the class-level API note.

of

static Arguments of(@Nullable Object... arguments)

Factory method for creating an instance of Arguments based on the supplied arguments.

Parameters:

arguments - the arguments to be used for an invocation of the test method; must not be null but may contain null

Returns:

an instance of Arguments; never null

See Also:

• arguments(Object...)
• argumentSet(String, Object...)

arguments

static Arguments arguments(@Nullable Object... arguments)

Factory method for creating an instance of Arguments based on the supplied arguments.

This method is an alias for of(java.lang.Object...) and is intended to be used when statically imported — for example, via: import static org.junit.jupiter.params.provider.Arguments.arguments;

Parameters:

arguments - the arguments to be used for an invocation of the test method; must not be null but may contain null

Returns:

an instance of Arguments; never null

Since:

5.3

See Also:

• argumentSet(String, Object...)

argumentSet

@API(status=MAINTAINED,
     since="5.13.3")
static Arguments.ArgumentSet argumentSet(String name,
 @Nullable Object... arguments)

Factory method for creating an Arguments.ArgumentSet based on the supplied name and arguments.

Favor this method over Arguments.of(...) and arguments(...) when you wish to assign a name to the entire set of arguments.

This method is well suited to be used as a static import — for example, via: import static org.junit.jupiter.params.provider.Arguments.argumentSet;.

Parameters:

name - the name of the argument set; must not be null or blank

arguments - the arguments to be used for an invocation of the test method; must not be null but may contain null

Returns:

an ArgumentSet; never null

Since:

5.11

See Also:

• Arguments.ArgumentSet
• ParameterizedTest.ARGUMENT_SET_NAME_PLACEHOLDER
• ParameterizedTest.ARGUMENT_SET_NAME_OR_ARGUMENTS_WITH_NAMES_PLACEHOLDER