test: count the probes that miss before the streaming cache hit - #44
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The test polls until a request comes back X-Cache: HIT. A probe sent before the first stream's tail has written the cache is itself a MISS and calls the upstream, so asserting exactly one upstream call failed whenever the write lost that race. Each MISS now accounts for one call; the HIT still has to make none. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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streaming_cache_hit_replays_assembled_ssepolls until a request comes backX-Cache: HIT. A probe sent before the first stream's post-flight task has written the cache is itself a MISS and calls the upstream, so the "exactly one upstream call" assertion failed whenever that write lost the race (seen locally once in a full run). Each MISS now accounts for one upstream call; the HIT still has to make none, which is what the test is about.Local: full integration suite green on own containers.
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