esphome/tests/integration/fixtures/scheduler_interval_zero_coerced.yaml

esphome:
  name: sched-interval-zero

host:
api:
logger:
  level: DEBUG

globals:
  - id: fire_count
    type: int
    initial_value: "0"

interval:
  # Deliberately configure 0ms — this path goes through the C++
  # Scheduler::set_timer_common_ coercion (not the Python cv.update_interval
  # path, since interval: doesn't call cv.update_interval — it's an intervals
  # component schema, not a PollingComponent's update_interval).
  # Expected: scheduler coerces to 1ms at registration, emits ESP_LOGE,
  # fires at ~1kHz instead of spinning.
  - interval: 0ms
    then:
      - lambda: |-
          id(fire_count) += 1;
          if (id(fire_count) == 50) {
            ESP_LOGI("test", "ZERO_INTERVAL_50_FIRES_REACHED");
          }