`Test-AzResourceGroupDeployment` outputs empty warning when it found no problems

[o-l-a-v]

Description

Seems Test-AzResourceGroupDeployment outputs an empty warning when it finds no errors.

Tried with -Debug. Right after it says no errors were found the warning is outputted.

Issue script & Debug output

See previous.

Environment data

Windows 11 24H2 x64
PowerShell v7.5.1 x64

Module versions

Az.Accounts v5.0.2
Az.Resources v8.0.0

Error output

[isra-fel]

azure-powershell/src/Resources/ResourceManager/Implementation/CmdletBase/TestDeploymentCmdletBase.cs

Line 46 in b35ee5b

WriteWarning(builder.ToString());

This seems to be related to empty diagnostics results. Should be suppressed by -SuppressDiagnostics.

Possible fix: add && validationInfo.Diagnostics.Count > 0 to

azure-powershell/src/Resources/ResourceManager/Implementation/CmdletBase/TestDeploymentCmdletBase.cs

Line 38 in b35ee5b

if (validationInfo.Errors.Count == 0 && !SuppressDiagnostics.IsPresent)