Add tests for the AsyncFunction

__test__/async-function.test.ts

@@ -0,0 +1,26 @@
+import {callAsyncFunction} from '../src/async-function'
+
+describe('callAsyncFunction', () => {
+  test('calls the function with its arguments', async () => {
+    const result = await callAsyncFunction({foo: 'bar'}, 'return foo')
+    expect(result).toEqual('bar')
+  })
+
+  test('throws on ReferenceError', async () => {
+    expect.assertions(1)
+
+    try {
+      await callAsyncFunction({}, 'proces')
+    } catch (err) {
+      expect(err).toBeInstanceOf(ReferenceError)
+    }
+  })
+
+  test('can access process', async () => {
+    await callAsyncFunction({}, 'process')
+  })
+
+  test('can access console', async () => {
+    await callAsyncFunction({}, 'console')
+  })
+})