This change removes `gulp` and replaces it with plain ol' `babel` and `mocha`.
## `appium`
- No gulp.
- `test/` has been re-organized. All test files now end in the extension `.spec.js`, which is a recognized convention and understood by editors/IDEs. The tests are further split into `unit` and `e2e` subdirs. This makes working with both `babel` and `mocha` easier.
- The tests are _not_ run against the transpiled code; code is now transpiled on-the-fly via `@babel/register`. This only affects `appium`.
- `commands-yml/validator.js` moved to `scripts/parse-yml-commands.js`. It has been rewritten as a CJS module. `commands-yml/` should not contain `.js` files.
- `test/setup.js` is a new test harness specific to Appium, which loads & configures `@babel/register`. Eventually, the contents of this file can be moved into the root monorepo's `test/setup.js`, but the rest of the packages do not need `@babel/register`, so we avoid the overhead.
## `@appium/gulp-plugins`
- Unfortunately, due to the new `npm test` strategy (see below), we cannot use the `nyan` reporter. Or rather, we _can_, but will not see the animation. So the reporter is now set to default to `spec`.
- Modified tests so they didn't overwrite the actual `build` dir with transpiled fixtures, which is what was happening. This was causing failures depending on the transpile/test order.
## All Packages
- All packages now have their own `build`, `test`, `test:e2e` and `dev` (just build + watch mode) npm scripts. This makes running a complete build easier, since each package can now provide its own appropriate command. This is _mostly_ just `gulp once` (where `gulp` was used before), except for `appium`, where `@babel/cli` is used directly.
- This is what happens when `npm test` is run from the monorepo (in order):
1. All packages are built (in parallel) by running `npm run build` in each folder (via `lerna`). See `pretest`
2. All code is linted directly via `eslint`.
3. All _unit tests_ are run w/ `npm test` in each folder, having assumed transpilation already occurred (if necessary).
- `npm run e2e-test` runs the `npm run test:e2e` in each folder. No transpilation occurs! Careful.
- All scripts are expected to live in `packages/*/scripts`, and this directory enforces CJS via ESLint. `postinstall.js` moved, as well as `check-npm-pack-files.js`. `generate-schema-declarations.mjs` moved from the root `scripts/` dir into `packages/appium/scripts/`; it's now CJS instead of ESM.
- I had profiled running various things with `lerna run --parallel`, but it turns out this is not faster. I'm not sure why, but I think it may have something to do with streaming STDOUT/STDERR, or potentially the overhead of running child processes outweighs the time it takes to actually run tests and builds.
- The behavior of `lerna run` now mimicks `lerna exec`, which was "run stuff in serial, streaming the output". The default behavior of `lerna run` is "run stuff in parallel, buffering the output". Buffered output sucks, and streaming the output from all tasks at once creates chaos. To override this behavior, you'll see `--parallel --concurrency=8 --prefix` for tasks that can truly be parallelized, like transpilation. The number 8 is the "maximum", and CI usually won't have more than 2 cores available anyway.
- When run in CI, Mocha runs with `--forbid-only`, which will fail if there's an `.only()` somewhere in the tests. Further, it forces color output.
## Etc.
- Updated Wallaby config, `.gitignore`, `.eslintignore`.
- Sorted `package.json` files
- Removed `watch` and `coverage` scripts which were broken anyway.
chore(appium): fix schema json path issues
- the path to the JSON schema is now correct: `lib/appium-config-schema.json`
- add `log-symbols` to devdeps for niceness. this is already a transitive dep
This PR makes `chai` and `should()` _globals_ when using Mocha:
- `chai` is configured with `chai-as-promised`
- A `.mocharc.js` requires `./test/setup.js` _from the monorepo root_.
- Updated the ESLint config to recognize the globals.
- Updated Wallaby config
All instances of `import chai...` and the like have been removed from all test files.
