Jasmine Custom Reporter ↔ Slack Notification: Selecting Alerts Without Noise

Goal

The objective is to emit Slack alerts only for failing specs while suppressing notifications for passing ones. The custom reporter must filter events, send an HTTP POST to a webhook, and avoid generating noise during a CI run.

Constraints & Uncertainty

• Asynchronous reporter logic: it is unclear whether Jasmine guarantees that pending HTTP requests are awaited before the test process terminates.
• CI environment handling: when CI=true is set, the reporter should conditionally silence alerts, but the interaction between environment variables and reporter execution is not documented.
• Reporter registration timing: adding a reporter after some specs have executed risks missing events, yet the exact registration window is not specified.

Open Questions

• Does Jasmine provide a mechanism to signal completion of asynchronous reporter actions so that the test run waits for all notifications to finish?
• How does the reporter interact with CI environment variables to suppress or enable alerts, and can this be configured via the reporter itself?
• What is the recommended practice for ensuring that custom reporters are registered before any specs run in a typical Jasmine CLI or Karma configuration?