swing-ui-test

The test harness for Compose Swing UI. It runs compositions off-screen and deterministically — the harness root is never shown, and nothing sleeps — so component behavior can be asserted in plain @Test methods. Content that composes Window { } / Dialog { } realizes real top-level peers, and the harness finds and asserts on those too.

Usage

Add the module as testImplementation, then write tests with runComposeSwingTest — a plain @Test method whose body is that block, calling setContent { … } to mount the composable under test.

See ../docs/TESTING-COMPONENTS.md for the full guide to finders, matchers, assertions, actions, and screenshot comparison; the API itself is documented in KDoc.

Related

• ../docs/TESTING-COMPONENTS.md — how to write component tests.

• ../swing-ui/README.md — the core library.