TestLogHandlers_HandleStreamLogs_SendsEvents raced the handler
goroutine against a broadcaster write and a 10ms sleep. The global
broadcaster is shared with every concurrently running test and drops
messages to full subscriber channels, so under CI load the test's
line could be dropped and the body stayed empty; it never failed
locally because the flood only exists during a full package run on a
slow runner (first CI execution of the Go steps in ~100 runs exposed
it).
Write the line into broadcaster history first and run the handler
synchronously with a pre-cancelled context: Subscribe replays history
before the live select loop, so subscription, SSE formatting, and
context cancellation are all exercised with no goroutine, no sleep,
and no dependence on concurrent traffic. Live-channel delivery stays
covered by the broadcaster's own package tests.
rcourtman
38b2007134