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The `resources/generic-sensor-helpers.js` tests require an implementation of
the `GenericSensorTest` interface, which should emulate platform
sensor backends. The `GenericSensorTest` interface is defined as:
```
class MockSensor {
// Sets fake data that is used to deliver sensor reading updates.
async setSensorReading(FrozenArray<double> readingData);
setStartShouldFail(boolean shouldFail); // Sets flag that forces sensor to fail.
getSamplingFrequency(); // Return the sampling frequency.
};
class MockSensorProvider {
// Sets flag that forces mock SensorProvider to fail when getSensor() is
// invoked.
setGetSensorShouldFail(DOMString sensorType, boolean shouldFail);
// Sets flag that forces mock SensorProvider to permissions denied when
// getSensor() is invoked.
setPermissionsDenied(DOMString sensorType, boolean permissionsDenied);
getCreatedSensor(DOMString sensorType); // Return `MockSensor` interface.
setMaximumSupportedFrequency(double frequency); // Sets the maximum frequency.
setMinimumSupportedFrequency(double frequency); // Sets the minimum frequency.
}
class GenericSensorTest {
initialize(); // Sets up the testing environment.
async reset(); // Frees the resources.
getSensorProvider(); // Returns `MockSensorProvider` interface.
};
```
The Chromium implementation of the `GenericSensorTest` interface is located in
[generic_sensor_mocks.js](../resources/chromium/generic_sensor_mocks.js).
Other browser vendors should provide their own implementations of
the `GenericSensorTest` interface.
[Known issue](https://github.com/web-platform-tests/wpt/issues/9686): a
WebDriver extension is a better approach for the Generic Sensor tests
automation.
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