Our tooling cannot handle very long failure messages well:
- when unfolding a test in the spyglass UI, it fills the entire screen
- failure correlation for http://go.k8s.io/triage has resource constraints
We cannot enforce that all tests only produce short failure messages and even
if we could, depending on the test failure, including more information may be
useful to understand it.
To achieve both goals (summary for correlation and overview, all details
available when digging deeper), too longer failure messages now get truncated,
with the full message guaranteed to be captured in the test output.
"Too long" is arbitrarily chosen to be similar to the gomega.MaxLength because
that has been a limit for failure message size in the past.
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