Ember Try

Ember Try is an Ember CLI addon designed to facilitate testing Ember applications and addons against various versions of their dependencies, particularly `ember` and `ember-data`. The current stable version is 4.0.0, released in March 2025. It allows developers to define "scenarios" that modify `package.json` dependencies, install them, run a specified command (usually `ember test`), and then revert the changes. This is crucial for maintaining compatibility across different Ember ecosystem versions. Its primary differentiators include deep integration with `ember-cli`, a declarative configuration for scenarios, and commands like `ember try:each` for iterative testing and `ember try:one` for specific scenario runs. It also supports automatic scenario generation based on `semver` ranges in `package.json` via its `versionCompatibility` feature, making it a cornerstone for robust Ember ecosystem testing. The release cadence appears tied to major Ember CLI or Node.js ecosystem shifts, with major versions released periodically to address breaking changes and new features.