Test that AudioContext's state is updated if "allowed to start" (#24611)

For WebAudio/web-audio-api#2218.
web-platform-tests · Jul 16, 2020 · 36cff35 · 36cff35
1 parent 8c155e4
commit 36cff35
Showing 1 changed file with 25 additions and 0 deletions.
diff --git a/webaudio/the-audio-api/the-audiocontext-interface/constructor-allowed-to-start.html b/webaudio/the-audio-api/the-audiocontext-interface/constructor-allowed-to-start.html
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+<!doctype html>
+<title>AudioContext state around "allowed to start" in constructor</title>
+<link rel=help href=https://webaudio.github.io/web-audio-api/#dom-audiocontext-audiocontext>
+<script src=/resources/testharness.js></script>
+<script src=/resources/testharnessreport.js></script>
+<script src=/resources/testdriver.js></script>
+<script src=/resources/testdriver-vendor.js></script>
+<script>
+setup({ single_test: true });
+test_driver.bless("audio playback", () => {
+  const ctx = new AudioContext();
+  // Immediately after the constructor the state is "suspended" because the
+  // control message to start processing has just been sent, but the state
+  // should change soon.
+  assert_equals(ctx.state, "suspended", "initial state");
+  ctx.onstatechange = () => {
+    assert_equals(ctx.state, "running", "state after statechange event");
+    // Now create another context and ensure it starts out in the "suspended"
+    // state too, ensuring it's not synchronously "running".
+    const ctx2 = new AudioContext();
+    assert_equals(ctx2.state, "suspended", "initial state of 2nd context");
+    done();
+  };
+});
+</script>