1 files changed, 39 insertions, 0 deletions
diff --git a/testing/web-platform/tests/ambient-light/AmbientLightSensor_onstatechange.html b/testing/web-platform/tests/ambient-light/AmbientLightSensor_onstatechange.html
new file mode 100644
index 000000000..99a706f20
--- /dev/null
+++ b/testing/web-platform/tests/ambient-light/AmbientLightSensor_onstatechange.html
@@ -0,0 +1,39 @@
+<!DOCTYPE html>
+<meta charset="utf-8">
+<title>AmbientLightSensor Test: onstatechange</title>
+<link rel="author" title="Intel" href="http://www.intel.com">
+<link rel="help" href="https://www.w3.org/TR/ambient-light/">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<div id="log"></div>
+<script>
+var sensor;
+setup(function() {
+  sensor = new AmbientLightSensor();
+});
+
+test(function() {
+  assert_equals(sensor.state, "idle");
+}, "The default sensor.state is 'idle'.");
+
+async_test(function(t) {
+  sensor.onstatechange = t.step_func_done(function(event) {
+    assert_equals(sensor.state, "activating");
+  });
+  sensor.onerror = t.step_func_done(function(event) {
+    assert_unreached(event.error.name + ":" + event.error.message);
+  });
+  sensor.start();
+}, "The sensor.state changes to 'activating' after sensor.start().");
+
+async_test(function(t) {
+  sensor.onstatechange = t.step_func_done(function(event) {
+    assert_equals(sensor.state, "idle");
+  });
+  sensor.onerror = t.step_func_done(function(event) {
+    assert_unreached(event.error.name + ":" + event.error.message);
+  });
+  sensor.stop();
+}, "The sensor.state changes to 'idle' after sensor.stop().");
+
+</script>