Adjust test sleeping

Author: Vectorial1024

tests/AsyncTaskTest.php

@@ -86,7 +86,7 @@ public function testAsyncBasic()
         $task->start();
 
         // sleep a bit to wait for the async
-        sleep(1);
+        $this->sleep(1.5);
 
         $this->assertFileExists($testFileName, "The async task probably did not run because its output file cannot be found.");
         $this->assertStringEqualsFile($testFileName, $message);

tests/BaseTestCase.php

@@ -30,6 +30,19 @@ protected function getStoragePath(string $fileName): string
         return dirname(__FILE__, 2) . "/storage/$fileName";
     }
 
+    /**
+     * Sleeps for some time.
+     * @param float $seconds The number of seconds.
+     * @return void
+     */
+    protected function sleep(float $seconds): void
+    {
+        $wholeSeconds = (int) $seconds;
+        $fractionalSeconds = $seconds - $wholeSeconds;
+        sleep($wholeSeconds);
+        usleep($fractionalSeconds * 1000000);
+    }
+
     // ---
 
     public function call($method, $uri, $parameters = [], $files = [], $server = [], $content = null, $changeHistory = true)