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(test): ensure a regenatorRuntime import is added
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- when using transform-runtime with helpers: false, it should import
  from @babel/runtime/regenerator
- either this plugin configured like this or a direct import of
  regenerator in one's own library code is the only way to get it to
  be imported
  - just using a generator will make regenerator code added, but
    without any import (leading to a ReferenceError)
  - TODO: make it easier or automatic to use generators
    - useBuiltIns of preset-env?
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agilgur5 committed Mar 19, 2020
1 parent 72c9303 commit d1a72e3
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Showing 4 changed files with 14 additions and 1 deletion.
3 changes: 2 additions & 1 deletion test/integration/fixtures/build-withBabel/.babelrc.js
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@@ -1,5 +1,6 @@
module.exports = {
plugins: [
'styled-components'
'styled-components',
['@babel/plugin-transform-runtime', { helpers: false }],
]
}
3 changes: 3 additions & 0 deletions test/integration/fixtures/build-withBabel/src/generator.ts
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@@ -0,0 +1,3 @@
export function* testGenerator() {
return yield 'blah';
}
2 changes: 2 additions & 0 deletions test/integration/fixtures/build-withBabel/src/index.ts
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@@ -1,5 +1,7 @@
import './styled.tsx';

export { testGenerator } from './generator';

export const sum = (a: number, b: number) => {
if ('development' === process.env.NODE_ENV) {
console.log('fuck');
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7 changes: 7 additions & 0 deletions test/integration/tsdx-build-withBabel.test.js
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Expand Up @@ -32,6 +32,13 @@ describe('integration :: tsdx build :: .babelrc.js', () => {
expect(output.code).toBe(1);
});

it('should add an import of regeneratorRuntime', () => {
const output = shell.grep(/@babel\/runtime\/regenerator/, [
'dist/build-withbabel.*.js',
]);
expect(output.code).toBe(0);
});

it('should compile files into a dist directory', () => {
expect(shell.test('-f', 'dist/index.js')).toBeTruthy();
expect(
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