org.junit.gen5.commons.util

Class CollectionUtils

java.lang.Object

org.junit.gen5.commons.util.CollectionUtils

@API(value=Internal)
public final class CollectionUtils
extends java.lang.Object

Collection of utilities for working with Collections.

DISCLAIMER

These utilities are intended solely for usage within the JUnit framework itself. Any usage by external parties is not supported. Use at your own risk!

Since:

5.0

Method Summary

Modifier and Type	Method and Description
static <T> T	getOnlyElement(java.util.Collection<T> collection) Read the only element of a collection of size 1.

Methods inherited from class java.lang.Object

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

Method Detail

getOnlyElement

public static <T> T getOnlyElement(java.util.Collection<T> collection)

Read the only element of a collection of size 1.

Parameters:

collection - the collection to get the element from

Returns:

the only element of the collection

Throws:

PreconditionViolationException - if the collection is null or does not contain exactly one element