fix: create unique image tags for each test in order to avoid race conditions between tests

[korenyoni]

what

• create unique image tags for each test in order to avoid race condititions

why

This assertion fails because of a race condition between the three tests in this repo.

For example, take a look at this renovate PR:

The manifest produced by each commit in the screenshot are as follows, in order from oldest to newest:

$ docker buildx imagetools inspect registry.hub.docker.com/cloudposse/github-action-docker-build-push:sha-61a55ff023a1813dca90b5ddc2becbb248ff79b9 --raw | jq '.manifests | map(select(.platform.architecture != "unknown") | .platform.os + "/" + .platform.architecture)'
[
  "linux/amd64",
  "linux/arm64"
]
$ docker buildx imagetools inspect registry.hub.docker.com/cloudposse/github-action-docker-build-push:sha-c5f9ccf5aad31e6d255ea1631a4dc2311d88452e --raw | jq '.manifests | map(select(.platform.architecture != "unknown") | .platform.os + "/" + .platform.architecture)'
[
  "linux/amd64"
]
$ docker buildx imagetools inspect registry.hub.docker.com/cloudposse/github-action-docker-build-push:sha-fd863042e23edb3cdea14cd459f4307ed2b29f3d --raw | jq '.manifests | map(select(.platform.architecture != "unknown") | .platform.os + "/" + .platform.architecture)'
[
  "linux/amd64",
  "linux/arm64"
]

As previously mentioned, there is a race condition between the three tests that get dispatched by this action. They all produce an image tag of sha-[sha]. That means that if the test-docker-build-multi-platform.yml build finishes before the test-docker-build.yml build, the multi-platform manifest will be overwritten by the single-platform image.

references

N/A

[dudymas]

lgtm! thanks for finding this

[github-actions]

These changes were released in v1.16.1.