Module org.junit.jupiter.params
Package org.junit.jupiter.params.aggregator

Interface ArgumentsAccessor

All Known Implementing Classes:
DefaultArgumentsAccessor
@API(status=STABLE, since="5.7") public interface ArgumentsAccessor
ArgumentsAccessor defines the public API for accessing arguments provided by an ArgumentsProvider for a single invocation of a @ParameterizedTest method.

Specifically, an ArgumentsAccessor aggregates a set of arguments for a given invocation of a parameterized test and provides convenience methods for accessing those arguments in a type-safe manner with support for automatic type conversion.

An instance of ArgumentsAccessor will be automatically supplied for any parameter of type ArgumentsAccessor in a parameterized test. In addition, ArgumentsAggregator implementations are given access to an ArgumentsAccessor.

This interface is not intended to be implemented by clients.

Additional Kotlin arguments accessors can be found as extension functions in the org.junit.jupiter.params.aggregator package.

Since:
5.2
See Also:
ArgumentsAggregator, ParameterizedTest

  • Method Summary

    Modifier and Type
    Method
    Description
    Object
    get​(int index)
    Get the value of the argument at the given index as an Object.
    <T> T
    get​(int index, Class<T> requiredType)
    Get the value of the argument at the given index as an instance of the required type.
    Boolean
    getBoolean​(int index)
    Get the value of the argument at the given index as a Boolean, performing automatic type conversion as necessary.
    Byte
    getByte​(int index)
    Get the value of the argument at the given index as a Byte, performing automatic type conversion as necessary.
    Character
    getCharacter​(int index)
    Get the value of the argument at the given index as a Character, performing automatic type conversion as necessary.
    Double
    getDouble​(int index)
    Get the value of the argument at the given index as a Double, performing automatic type conversion as necessary.
    Float
    getFloat​(int index)
    Get the value of the argument at the given index as a Float, performing automatic type conversion as necessary.
    Integer
    getInteger​(int index)
    Get the value of the argument at the given index as a Integer, performing automatic type conversion as necessary.
    Long
    getLong​(int index)
    Get the value of the argument at the given index as a Long, performing automatic type conversion as necessary.
    Short
    getShort​(int index)
    Get the value of the argument at the given index as a Short, performing automatic type conversion as necessary.
    String
    getString​(int index)
    Get the value of the argument at the given index as a String, performing automatic type conversion as necessary.
    int
    size()
    Get the number of arguments in this accessor.
    Object[]
    toArray()
    Get all arguments in this accessor as an array.
    List<Object>
    toList()
    Get all arguments in this accessor as an immutable list.

  • Method Details

    • get

      Object get​(int index) throws ArgumentAccessException
      Get the value of the argument at the given index as an Object.
      Parameters:
      index - the index of the argument to get; must be greater than or equal to zero and less than size()
      Returns:
      the value at the given index, potentially null
      Throws:
      ArgumentAccessException

    • get

      <T> T get​(int index, Class<T> requiredType) throws ArgumentAccessException
      Get the value of the argument at the given index as an instance of the required type.
      Parameters:
      index - the index of the argument to get; must be greater than or equal to zero and less than size()
      requiredType - the required type of the value; never null
      Returns:
      the value at the given index, potentially null
      Throws:
      ArgumentAccessException

    • getCharacter

      Character getCharacter​(int index) throws ArgumentAccessException
      Get the value of the argument at the given index as a Character, performing automatic type conversion as necessary.
      Parameters:
      index - the index of the argument to get; must be greater than or equal to zero and less than size()
      Returns:
      the value at the given index, potentially null
      Throws:
      ArgumentAccessException - if the value cannot be accessed or converted to the desired type

    • getBoolean

      Boolean getBoolean​(int index) throws ArgumentAccessException
      Get the value of the argument at the given index as a Boolean, performing automatic type conversion as necessary.
      Parameters:
      index - the index of the argument to get; must be greater than or equal to zero and less than size()
      Returns:
      the value at the given index, potentially null
      Throws:
      ArgumentAccessException - if the value cannot be accessed or converted to the desired type

    • getByte

      Byte getByte​(int index) throws ArgumentAccessException
      Get the value of the argument at the given index as a Byte, performing automatic type conversion as necessary.
      Parameters:
      index - the index of the argument to get; must be greater than or equal to zero and less than size()
      Returns:
      the value at the given index, potentially null
      Throws:
      ArgumentAccessException - if the value cannot be accessed or converted to the desired type

    • getShort

      Short getShort​(int index) throws ArgumentAccessException
      Get the value of the argument at the given index as a Short, performing automatic type conversion as necessary.
      Parameters:
      index - the index of the argument to get; must be greater than or equal to zero and less than size()
      Returns:
      the value at the given index, potentially null
      Throws:
      ArgumentAccessException - if the value cannot be accessed or converted to the desired type

    • getInteger

      Integer getInteger​(int index) throws ArgumentAccessException
      Get the value of the argument at the given index as a Integer, performing automatic type conversion as necessary.
      Parameters:
      index - the index of the argument to get; must be greater than or equal to zero and less than size()
      Returns:
      the value at the given index, potentially null
      Throws:
      ArgumentAccessException - if the value cannot be accessed or converted to the desired type

    • getLong

      Long getLong​(int index) throws ArgumentAccessException
      Get the value of the argument at the given index as a Long, performing automatic type conversion as necessary.
      Parameters:
      index - the index of the argument to get; must be greater than or equal to zero and less than size()
      Returns:
      the value at the given index, potentially null
      Throws:
      ArgumentAccessException - if the value cannot be accessed or converted to the desired type

    • getFloat

      Float getFloat​(int index) throws ArgumentAccessException
      Get the value of the argument at the given index as a Float, performing automatic type conversion as necessary.
      Parameters:
      index - the index of the argument to get; must be greater than or equal to zero and less than size()
      Returns:
      the value at the given index, potentially null
      Throws:
      ArgumentAccessException - if the value cannot be accessed or converted to the desired type

    • getDouble

      Double getDouble​(int index) throws ArgumentAccessException
      Get the value of the argument at the given index as a Double, performing automatic type conversion as necessary.
      Parameters:
      index - the index of the argument to get; must be greater than or equal to zero and less than size()
      Returns:
      the value at the given index, potentially null
      Throws:
      ArgumentAccessException - if the value cannot be accessed or converted to the desired type

    • getString

      String getString​(int index) throws ArgumentAccessException
      Get the value of the argument at the given index as a String, performing automatic type conversion as necessary.
      Parameters:
      index - the index of the argument to get; must be greater than or equal to zero and less than size()
      Returns:
      the value at the given index, potentially null
      Throws:
      ArgumentAccessException - if the value cannot be accessed or converted to the desired type

    • size

      int size()
      Get the number of arguments in this accessor.

    • toArray

      Object[] toArray()
      Get all arguments in this accessor as an array.

    • toList

      List<Object> toList()
      Get all arguments in this accessor as an immutable list.