iron-test-helpers

Web components tester

Moved to Polymer/tools monorepo

Web components tester istambul

Instanbul coverage reporting for projects being tested by web-component-tester

test-fixture

The `<test-fixture>` element simplifies DOM management in test suites by providing a consistent way to reset and restore DOM state between tests. It helps eliminate non-deterministic test failures caused by leftover DOM changes, reducing boilerplate setup and teardown code. ## Key Features - **DOM Reset** — Wraps test DOM in a template and creates fresh copies for each test run. - **Automatic Cleanup** — Provides a `restore()` method to clean up fixtured elements after tests. - **Mocha Integration** — Includes a helper script (`test-fixture-mocha.js`) for simplified usage with automatic restoration in Mocha suites. - **Data-Binding Support** — Works with data-binding systems like Polymer's `dom-bind` by supporting a `stamp(model)` method for templating. - **Complex Templates** — Supports multiple and nested templates within a fixture for flexible test scenarios. ## Philosophy The project aims to reduce test fragility by ensuring DOM state is consistently reset, making tests deterministic and easier to maintain without extensive boilerplate.