Rewrite test for #369 so it can be run without a true audio backend

Author: orottier

tests/online.rs

@@ -125,11 +125,26 @@ fn test_channels() {
 #[test]
 fn test_panner_node_drop_panic() {
     // https://github.com/orottier/web-audio-api-rs/issues/369
-    let context = AudioContext::default();
+    let options = AudioContextOptions {
+        sink_id: "none".into(),
+        ..AudioContextOptions::default()
+    };
+    let context = AudioContext::new(options);
 
+    // create a new panner and drop it
     let panner = context.create_panner();
     drop(panner);
-    std::thread::sleep(std::time::Duration::from_millis(100));
+
+    // allow the audio render thread to boot and handle adding and dropping the panner
+    std::thread::sleep(std::time::Duration::from_millis(200));
+
+    // creating a new panner node should not crash the render thread
     let mut _panner = context.create_panner();
-    std::thread::sleep(std::time::Duration::from_millis(100));
+
+    // A crashed thread will not fail the test (only if the main thread panics).
+    // Instead inspect if there is progression of time in the audio context.
+
+    let time = context.current_time();
+    std::thread::sleep(std::time::Duration::from_millis(200));
+    assert!(context.current_time() >= time + 0.15);
 }