test: spend enough Gemini tokens to exhaust account credit

Floor-dividing the allowance by Gemini 3.7 Flash's declared promo output
rate left 2 microUSD, so the thread-open refusal never fired. Ceil the
token count so the metered spend covers the grant.

Deploy story

What this commit did to the running system — joined from the forge receipt chain, the part a commit page elsewhere cannot show.

pushed

by user · WAL seq 476 · 2026-08-28T06:32:40.593469Z

built

5 modules in 151.6 s

deployed

live · 5 modules on 3 nodes · push→live —

deployed

needs_rolling_replace · 5 modules on 0 nodes · push→live —

Changed files

• modified test/openagents_web/controllers/thread_controller_test.exs

Diff

1 file changed, +4 -1

      {:ok, _metered} =

        Inference.record_usage(grant, %{

          "output_tokens" => div(allowance * 1_000_000, rate)

          # Ceil the token count so a rate that does not divide the allowance

          # still spends it all. Floor division left 2 microUSD on Gemini's

          # declared promo rate and the next open was not refused.

          "output_tokens" => div(allowance * 1_000_000 + rate - 1, rate)

        })

      assert Credit.remaining(grant.owner_visitor_id) == 0