1 files changed, 142 insertions, 0 deletions
diff --git a/testing/web-platform/tests/generic-sensor/resources/generic-sensor-helpers.js b/testing/web-platform/tests/generic-sensor/resources/generic-sensor-helpers.js
new file mode 100644
index 0000000000..9a51a591ce
--- /dev/null
+++ b/testing/web-platform/tests/generic-sensor/resources/generic-sensor-helpers.js
@@ -0,0 +1,142 @@
+'use strict';
+
+// These tests rely on the User Agent providing an implementation of
+// platform sensor backends.
+//
+// In Chromium-based browsers this implementation is provided by a polyfill
+// in order to reduce the amount of test-only code shipped to users. To enable
+// these tests the browser must be run with these options:
+//
+//   --enable-blink-features=MojoJS,MojoJSTest
+async function loadChromiumResources() {
+  await loadScript('/resources/testdriver.js');
+  await loadScript('/resources/testdriver-vendor.js');
+  await loadScript('/page-visibility/resources/window_state_context.js');
+  await import('/resources/chromium/generic_sensor_mocks.js');
+}
+
+async function initialize_generic_sensor_tests() {
+  if (typeof GenericSensorTest === 'undefined') {
+    const script = document.createElement('script');
+    script.src = '/resources/test-only-api.js';
+    script.async = false;
+    const p = new Promise((resolve, reject) => {
+      script.onload = () => { resolve(); };
+      script.onerror = e => { reject(e); };
+    })
+    document.head.appendChild(script);
+    await p;
+
+    if (isChromiumBased) {
+      await loadChromiumResources();
+    }
+  }
+
+  let sensorTest = new GenericSensorTest();
+  await sensorTest.initialize();
+  return sensorTest;
+}
+
+function sensor_test(func, name, properties) {
+  promise_test(async (t) => {
+    t.add_cleanup(() => {
+      if (sensorTest)
+        return sensorTest.reset();
+    });
+
+    let sensorTest = await initialize_generic_sensor_tests();
+    return func(t, sensorTest.getSensorProvider());
+  }, name, properties);
+}
+
+function verifySensorReading(pattern, values, timestamp, isNull) {
+  // If |val| cannot be converted to a float, we return the original value.
+  // This can happen when a value in |pattern| is not a number.
+  function round(val) {
+    const res = Number.parseFloat(val).toPrecision(6);
+    return res === "NaN" ? val : res;
+  }
+
+  if (isNull) {
+    return (values === null || values.every(r => r === null)) &&
+           timestamp === null;
+  }
+
+  return values.every((r, i) => round(r) === round(pattern[i])) &&
+         timestamp !== null;
+}
+
+function verifyXyzSensorReading(pattern, {x, y, z, timestamp}, isNull) {
+  return verifySensorReading(pattern, [x, y, z], timestamp, isNull);
+}
+
+function verifyQuatSensorReading(pattern, {quaternion, timestamp}, isNull) {
+  return verifySensorReading(pattern, quaternion, timestamp, isNull);
+}
+
+function verifyAlsSensorReading(pattern, {illuminance, timestamp}, isNull) {
+  return verifySensorReading(pattern, [illuminance], timestamp, isNull);
+}
+
+function verifyGeoSensorReading(pattern, {latitude, longitude, altitude,
+  accuracy, altitudeAccuracy, heading, speed, timestamp}, isNull) {
+  return verifySensorReading(pattern, [latitude, longitude, altitude,
+    accuracy, altitudeAccuracy, heading, speed], timestamp, isNull);
+}
+
+function verifyProximitySensorReading(pattern, {distance, max, near, timestamp}, isNull) {
+  return verifySensorReading(pattern, [distance, max, near], timestamp, isNull);
+}
+
+// Assert that two Sensor objects have the same properties and values.
+//
+// Verifies that ``actual`` and ``expected`` have the same sensor properties
+// and, if so, that their values are the same.
+//
+// @param {Sensor} actual - Test value.
+// @param {Sensor} expected - Expected value.
+function assert_sensor_equals(actual, expected) {
+  assert_true(
+      actual instanceof Sensor,
+      'assert_sensor_equals: actual must be a Sensor');
+  assert_true(
+      expected instanceof Sensor,
+      'assert_sensor_equals: expected must be a Sensor');
+
+  // These properties vary per sensor type.
+  const CUSTOM_PROPERTIES = [
+    ['illuminance'], ['quaternion'], ['x', 'y', 'z'],
+    [
+      'latitude', 'longitude', 'altitude', 'accuracy', 'altitudeAccuracy',
+      'heading', 'speed'
+    ]
+  ];
+
+  // These properties are present on all objects derived from Sensor.
+  const GENERAL_PROPERTIES = ['timestamp'];
+
+  for (let customProperties of CUSTOM_PROPERTIES) {
+    if (customProperties.every(p => p in actual) &&
+        customProperties.every(p => p in expected)) {
+      customProperties.forEach(p => {
+        if (customProperties == 'quaternion') {
+          assert_array_equals(
+              actual[p], expected[p],
+              `assert_sensor_equals: property '${p}' does not match`);
+        } else {
+          assert_equals(
+              actual[p], expected[p],
+              `assert_sensor_equals: property '${p}' does not match`);
+        }
+      });
+      GENERAL_PROPERTIES.forEach(p => {
+        assert_equals(
+            actual[p], expected[p],
+            `assert_sensor_equals: property '${p}' does not match`);
+      });
+      return;
+    }
+  }
+
+  assert_true(false, 'assert_sensor_equals: sensors have different attributes');
+}