tests in a file are not running when top-level describe is exported

[trusktr]

I have some code like this:

export default describe('...', () => {
  test('...', () => {
    // ... this never runs ...
  })
})

and when I run asp, it does not execute any tests in side the describe block and the output is like this:

✔ src/as/renderers/webgl/WebGLRenderLists.spec.ts Pass: 0 / 0 Todo: 0 Time: 6.319ms
  [Result]: ✔ PASS
   [Files]: 1 total
  [Groups]: 1 count, 1 pass
   [Tests]: 0 pass, 0 fail, 0 total
    [Time]: 1745.893ms

(Note the 0 pass, 0 fail, 0 total.)

If I remove the export default, then the issue goes away:

describe('...', () => {
  test('...', () => {
    // ... this never runs ...
  })
})

and I get expected output:

✔ src/as/renderers/webgl/WebGLRenderLists.spec.ts Pass: 0 / 0 Todo: 0 Time: 6.319ms
  [Result]: ✖ FAIL
   [Files]: 1 total
  [Groups]: 5 count, 5 pass
   [Tests]: 1 pass, 4 fail, 5 total           <--- good, it ran the tests
    [Time]: 1975.077ms

[jtenner]

The describe function is void. When you export the return value of a void function, this results in undefined assemblyscript behavior.

function noValue(): void {}

// should be a compile time error
export default noValue();

Please feel free to file an issue with the assemblyscript repo.