In v7.4, `Test-Json` no longer accepts nonstandard JSON extensions, such as single quotes, barewords, and comments

[mklement0]

Type of issue

Outdated article

Feedback

• Test-Json was switched to using System.Text.Json to improve JSON schema support, in PR #18141, which took effect in v7.4.0.

• This introduced a problematic asymmetry, in that Test-Json now no longer accepts nonstandard JSON (single quotes, barewords, comments), whereas the NewtonSoft.Json-based ConvertFrom-Json does; e..g,
  '{ foo: 1 }' | ConvertFrom-Json succeeds (property name is bareword), whereas
  '{ foo: 1 }' | Test-Json now fails.

• For details, see Breaking Change: JSONC no longer works after 7.4.0 PowerShell/PowerShell#20782 (comment).

Note that this massive breaking change was likely unintentional, and at this point there's been no official feedback as to whether the old behavior will (also) be restored.

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Therefore:

• The page should state that only strictly conformant JSON is now being recognized as valid by Test-Json
• The examples should be updated accordingly; e.g., "{'name': 'Ashley', 'age': 25}" | Test-Json no longer passes, due to the use of single quotes.

Page URL

https://learn.microsoft.com/en-us/powershell/module/microsoft.powershell.utility/test-json?view=powershell-7.4&viewFallbackFrom=powershell-7

Content source URL

https://github.com/MicrosoftDocs/PowerShell-Docs/blob/main/reference/7.4/Microsoft.PowerShell.Utility/Test-Json.md

Author

@sdwheeler

Document Id

2916f68d-0849-3302-7422-918f748aa6d4