fix for #7365, prevent pipelines from overriding provided prompt embeds

[bghira]

What does this PR do?

Fixes #7365

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Who can review?

@sayakpaul @yiyixuxu

[HuggingFaceDocBuilderDev]

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[yiyixuxu]

why are all the tests failing?

[yiyixuxu]

can we look into the remaining failing tests?

[bghira]

wow, i hadn't expected all of those, or really looked into them until now. i'm not sure why this simple check made those tests fail. i am wondering if there's something i need to check first before assigning the prompt embeds 🤔 like whether we have any? should i try and run the unit tests locally again?

[bghira]

@yiyixuxu i was trying again today and make test doesn't work here as i guess i don't have the right version of pytest installed, and now running pip install diffusers[dev] but i think there must be a way to run this in a Docker container?

edit: after pip install diffusers[dev] it now works to run make test

[github-actions]

This issue has been automatically marked as stale because it has not had recent activity. If you think this still needs to be addressed please comment on this thread.

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[sayakpaul]

Thanks, @bghira! Apologies for the delay on my part. Would it be possible to add a test for this to https://github.com/huggingface/diffusers/blob/main/tests/pipelines/stable_diffusion_xl/test_stable_diffusion_xl.py?

[bghira]

cc @a-r-r-o-w for test

[sayakpaul]

Yeah let's ensure to add at least one test before merging.

[bghira]

was having trouble getting the test suite running when i pushed this and my new system doesn't have it working yet either - but a regression test would be great to keep it workin

[sayakpaul]

Seems like the core tests are failing with the changes.