-Shuffle:$false not respected in Get-Random #26456

Prerequisites

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Steps to reproduce

This is a sub-issue of #25242.

The cmdlet Get-Random does not respect explicit $false values for the -Shuffle switch parameter.

PS> $result = Get-Random -InputObject 1, 2, 3, 5, 8, 13 -Shuffle:$false
PS> $result.Count
PS> $result

Expected behavior

PS> $result = Get-Random -InputObject 1, 2, 3, 5, 8, 13 -Shuffle:$false
PS> $result.Count
1
PS> $result
5

-Shuffle:$false should behave the same as omitting the -Shuffle switch, returning a single random item from the input collection.

Actual behavior

PS> $result = Get-Random -InputObject 1, 2, 3, 5, 8, 13 -Shuffle:$false
PS> $result.Count
6
PS> $result
3
13
1
8
2
5

-Shuffle:$false behaves the same as -Shuffle or -Shuffle:$true, returning all items in shuffled order.

Error details

No error is thrown. The cmdlet executes but ignores the explicit $false value.

Environment data

PS> $PSVersionTable

Name                           Value
----                           -----
PSVersion                      7.5.4
PSEdition                      Core
GitCommitId                    7.5.4
OS                             Microsoft Windows 10.0.26100
Platform                       Win32NT
PSCompatibleVersions           {1.0, 2.0, 3.0, 4.0…}
PSRemotingProtocolVersion      2.3
SerializationVersion           1.1.0.1
WSManStackVersion              3.0

Visuals

No response