chore: add test for .aegir.ts config with ESM import

test/config/fixtures/custom-ts-config-with-esm-import/.aegir.ts

@@ -0,0 +1,15 @@
+import { isWritableStream } from 'is-stream'
+
+import type { PartialOptions } from '../../../../src/types';
+
+const config: PartialOptions = {
+  debug: true,
+  test: {
+    before: async (opts) => {
+      console.log('isWritableStream: ', isWritableStream)
+      return { env: { res: '4321' }  }
+    }
+  }
+}
+
+export default config

test/config/fixtures/custom-ts-config-with-esm-import/.eslintignore

@@ -0,0 +1 @@
+!.aegir.ts

test/config/fixtures/custom-ts-config-with-esm-import/.eslintrc.js

@@ -0,0 +1,8 @@
+export default {
+  "extends": "../../../../package.json",
+  "parserOptions": {
+    "sourceType": "module",
+    "project": ["./tsconfig.json"]
+  },
+  "parser": "@typescript-eslint/parser",
+}

test/config/fixtures/custom-ts-config-with-esm-import/package.json

@@ -0,0 +1,3 @@
+{
+    "name": "custom-config" 
+}

test/config/fixtures/custom-ts-config-with-esm-import/tsconfig.json

@@ -0,0 +1,10 @@
+{
+  "extends": "../../../../src/config/tsconfig.aegir.json",
+  "compilerOptions": {
+    "outDir": "dist",
+    "noEmit": true
+  },
+  "include": [
+    ".aegir.ts",
+  ]
+}

test/config/user.js

@@ -49,6 +49,18 @@ describe('config - user', () => {
     expect(res && res.env?.res).to.eql('1234')
   })
 
+  it('custom ts config with ESM import', async () => {
+    const conf = await config(getConfigSearchPath('fixtures/custom-ts-config-with-esm-import'))
+    expect(conf).to.have.property('debug').eql(true)
+    expect(conf).to.have.nested.property('test.before')
+    expect(conf).to.have.nested.property('test.after')
+
+    // @ts-ignore
+    const res = await conf.test.before()
+    expect(res).not.to.be.undefined()
+    expect(res && res.env?.res).to.eql('4321')
+  })
+
   it('custom ts config without extension', async () => {
     const conf = await config(getConfigSearchPath('fixtures/custom-ts-no-ext-config'))
     expect(conf).to.have.property('debug').eql(true)