Default to failures-only reporter for AI coding agents Closes #2816 Detect AI coding agents via environment variables (matching `AiAgent.detectAgentName` in `package:unified_analytics`) and default to the `failures-only` reporter in both the test runner and direct test execution, taking precedence over terminal detection. Explicit `--reporter`, `DART_TEST_REPORTER`, and `dart_test.yaml` settings still take precedence. Also call `writeFailureSummary` at the end of `FailuresOnlyReporter` runs so failing tests are listed at the end of the output.
Welcome! package:test is the standard testing library for Dart and Flutter. If you have questions about Dart testing, please see the docs for package:test. package:test_api and package:test_core are implementation details and generally not user-facing.
package:checks is a relatively new library for expressing test expectations. It's a more modern version of package:matcher and features a literate API.
| Package | Description | Issues | Version |
|---|---|---|---|
| checks | A framework for checking values against expectations and building custom expectations. |  |  |
| fake_async | Fake asynchronous events such as timers and microtasks for deterministic testing. | |  |
| matcher | Support for specifying test expectations via an extensible Matcher class. Also includes a number of built-in Matcher implementations for common cases. | |  |
| test | A full featured library for writing and running Dart tests across platforms. | |  |
| test_api | The user facing API for structuring Dart tests and checking expectations. |  | |
| test_core | A basic library for writing tests and running them on the VM. |  | |
| test_descriptor | An API for defining and verifying files and directory structures. | |  |
| test_process | Test processes: starting; validating stdout and stderr; checking exit code. | |  |