Merge pull request #245 from WyriHaximus/ensure-tests-run-in-an-fiber…

…-by-getting-current-fiber-and-etsting-it-against-null

Ensure tests run in and fiber by getting current fiber and testing it against !== null

tests/AsyncTestCaseTest.php

@@ -4,6 +4,7 @@
 
 namespace WyriHaximus\Tests\AsyncTestUtilities;
 
+use Fiber;
 use React\EventLoop\Loop;
 use WyriHaximus\AsyncTestUtilities\AsyncTestCase;
 use WyriHaximus\AsyncTestUtilities\TimeOut;
@@ -29,6 +30,11 @@ public function testAllTestsAreRanInAFiber(): void
         echo 'b';
     }
 
+    public function testFiberGetCurrentReturnsAFiberInstance(): void
+    {
+        self::assertInstanceOf(Fiber::class, Fiber::getCurrent());
+    }
+
     public function testExpectCallableExactly(): void
     {
         $callable = $this->expectCallableExactly(3);