Async tests not handled correctly

[llaski]

I don't think the async tests are currently being handled correctly. Examples below:

Test that fails correctly:

/** @test */
async_test_not_handled_correctly() {
        console.log('Before Promise')
        new Promise(resolve => setTimeout(resolve, 10))
        console.log('After Promise')

        this.assertEquals(1, 2);
}

Result:

Petrol Javascript Testing Framework

Preparing files...
Running tests...

Tests (1) ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

 /core-tests/VueAsyncTestCaseTest.js
Before Promise
After Promise
   ✖ Async test not handled correctly

----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

1 Failing test

1) /core-tests/VueAsyncTestCaseTest.js async_test_not_handled_correctly
Failed: 
- 1
+ 2


Time: 1.274 seconds

Test that passes incorrectly incorrectly:

/** @test */
async async_test_not_handled_correctly() {
        console.log('Before Promise')
        await new Promise(resolve => setTimeout(resolve, 10))
        console.log('After Promise')

        this.assertEquals(1, 2);
}

Petrol Javascript Testing Framework

Preparing files...
Running tests...

Tests (1) ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

 /core-tests/VueAsyncTestCaseTest.js
Before Promise
   ✔ Async test not handled correctly (0.049ms)
After Promise
(node:26307) UnhandledPromiseRejectionWarning: Unhandled promise rejection (rejection id: 1): Error: Failed: Failed: 
- 1
+ 2
(node:26307) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.

----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

Time: 1.323 seconds

OK (1 tests, 1 passing)

Currently running node v8.9.3.