chore(): update the dependencies mercurius for compatibility with fastify v5.x 🔥

[Tony133]

PR Checklist

Please check if your PR fulfills the following requirements:

• The commit message follows our guidelines: https://github.com/nestjs/nest/blob/master/CONTRIBUTING.md
• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)

PR Type

What kind of change does this PR introduce?

• Bugfix
• Feature
• Code style update (formatting, local variables)
• Refactoring (no functional changes, no api changes)
• Build related changes
• CI related changes
• Other... Please describe:

What is the current behavior?

Issue Number:

• chore(deps): update dependency mercurius to v15 - autoclosed #3336
• chore(deps): update dependency @mercuriusjs/federation to v4 #3326
• chore(deps): update dependency @mercuriusjs/gateway to v4 #3327
• chore(deps): update dependency fastify to v5 #3335

What is the new behavior?

Proposal:

• Update the dependencies mercurius for compatibility with fastify v5.x 🔥

Does this PR introduce a breaking change?

• Yes
• No

Other information

[Tony133]

Tests fail due to this error: TypeError: A dynamic import callback was invoked without --experimental-vm-modules, very strange 🤔

[Tony133]

I think this is a problem with Jest.

Jest supports ECMAScript (ESM) modules from version 27.x, but full support for ESM, particularly dynamic imports, requires proper configuration, perhaps some configuration is missing? 🤔

[wodCZ]

There's an issue raised in mercurius: mercurius-js/mercurius#1122

Seems that Jest is to blame, which is unfortunate, since I'm pretty sure Nest won't move to a different testing environment because of single dependency.

As noted in the upstream issue, such cases will probably arise as lib maintainers join the ESM-only hype train.
Jest docs suggest enabling the --experimental-vm-modules node flag. I'll check other Nest repos, maybe this already happened elsewhere.

Edit: the only mention I found is in "using ESM package sample".

Edit 2: created a pr for the pr Tony133#1 with the suggested change from the sample. Not sure whether that fixes the tests completely.

[Tony133]

@wodCZ your solution seems to work, only 4 tests fail ( see screenshot )

I have updated the dependencies of fastify and mercurius, now there are these versions:

• Fastify v5.2.0
• Mercurius v16.0.0