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metamask-extension/test/run-jest.sh
Erik Marks 3de3765425
Add build-time code exclusion using code fencing (#12060)
This PR adds build-time code exclusion by means of code fencing. For details, please see the README in `./development/build/transforms`. Note that linting of transformed files as a form of validation is added in a follow-up, #12075.

Hopefully exhaustive tests are added to ensure that the transform works according to its specification. Since these tests are Node-only, they required their own Jest config. The recommended way to work with multiple Jest configs is using the `projects` field in the Jest config, however [that feature breaks coverage collection](https://github.com/facebook/jest/issues/9628). That being the case, I had to set up two separate Jest configs. In order to get both test suites to run in parallel, Jest is now invoked via a script, `./test/run-jest.sh`.

By way of example, this build system feature allows us to add fences like this:

```javascript
this.store.updateStructure({
  ...,
  GasFeeController: this.gasFeeController,
  TokenListController: this.tokenListController,
  ///: BEGIN:ONLY_INCLUDE_IN(beta)
  PluginController: this.pluginController,
  ///: END:ONLY_INCLUDE_IN
});
```

Which at build time are transformed to the following if the build type is not `beta`:

```javascript
this.store.updateStructure({
  ...,
  GasFeeController: this.gasFeeController,
  TokenListController: this.tokenListController,
});
```

Co-authored-by: Mark Stacey <markjstacey@gmail.com>
2021-09-14 10:00:04 -07:00

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#!/usr/bin/env bash
set -x
set -e
set -u
set -o pipefail
concurrently \
"jest --config=./jest.config.js $*" \
"jest --config=./development/jest.config.js $*"