Track the OS for browser platforms (#2449)
We currently do not allow making configuration using tools like
`OnPlatform` that is specific to an OS and browser combination. So if
there is a situation where tests don't work on firefox on windows, but
work everywhere else, we cannot express an intent to skip just the
failing tests.
In a usage like `OnPlatform({'windows && firefox'})` the selector will
never be true because `firefox` and `windows` are mutually exclusive.
It does allow cases like `'windows || firefox'` which matches windows VM
tests and firefox everywhere.
Changing this means a change to how existing selectors are evaluated. CI
may be impacted if a package is configuring a skip for an OS expecting
only the VM tests to be skipped on that OS with the browser tests still
running.
Use the new capability to skip a test that is failing on windows firefox
browser.
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. | |  |