esphome/tests/integration/fixtures/parallel_script_delays.yaml

esphome:
  name: test-parallel-delays

host:

logger:
  level: DEBUG

api:
  actions:
    - action: test_parallel_delays
      then:
        # Start three parallel script instances with small delays between starts
        - globals.set:
            id: instance_counter
            value: '1'
        - script.execute: parallel_delay_script
        - delay: 10ms
        - globals.set:
            id: instance_counter
            value: '2'
        - script.execute: parallel_delay_script
        - delay: 10ms
        - globals.set:
            id: instance_counter
            value: '3'
        - script.execute: parallel_delay_script

globals:
  - id: instance_counter
    type: int
    initial_value: '0'

script:
  - id: parallel_delay_script
    mode: parallel
    then:
      - lambda: !lambda |-
          int instance = id(instance_counter);
          ESP_LOGI("TEST", "Parallel script instance %d started", instance);
      - delay: 1s
      - lambda: !lambda |-
          static int completed_counter = 0;
          completed_counter++;
          ESP_LOGI("TEST", "Parallel script instance %d completed after delay", completed_counter);