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<!DOCTYPE html>
<meta charset="utf-8">
<title>iframe sensor tester</title>
<script src="/resources/testharness.js"></script>
<script src="/generic-sensor/generic-sensor-tests.js"></script>
<script>
let mockBackend = null;
// Minimum frequency supported by the mock backend is 5Hz. Using 200ms
// update period + 50ms threshold.
const maxUpdatePeriod = 250;
let sensor = null;
let lastTimestamp = null;
window.onmessage = (e) => {
if (e.data.command === 'create_sensor') {
assert_equals(sensor, null);
initialize_generic_sensor_tests().then((backend) => {
mockBackend = backend;
try {
sensor = new self[e.data.type]();
e.source.postMessage({command: e.data.command,
result: 'success'}, '*');
} catch (e) {
e.source.postMessage({command: e.data.command, result: ''}, '*');
}
});
} else if (e.data.command === 'start_sensor') {
assert_not_equals(sensor, null);
try {
sensor.start();
sensor.onreading = () => lastTimestamp = sensor.timestamp;
let onReadingListener = () => {
e.source.postMessage({command: e.data.command,
result: 'success'}, '*');
}
sensor.addEventListener('reading', onReadingListener, {once: true});
} catch (e) {
e.source.postMessage({command: e.data.command, result: ''}, '*');
}
} else if (e.data.command === 'is_sensor_suspended') {
let cachedTimestamp = lastTimestamp;
let timeoutId = setTimeout(() => {
e.source.postMessage({command: e.data.command,
result: cachedTimestamp === lastTimestamp}, '*');
}, maxUpdatePeriod);
let suspendListener = () => {
clearTimeout(timeoutId);
e.source.postMessage({command: e.data.command,
result: cachedTimestamp === lastTimestamp}, '*');
}
sensor.addEventListener('reading', suspendListener, {once: true});
} else if (e.data.command === 'reset_sensor_backend') {
if (sensor) {
sensor.stop();
}
mockBackend.reset().then(() => {
e.source.postMessage({command: e.data.command,
result: 'success'}, '*');
});
}
}
</script>
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