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import QtQuick 2.0
import QtTest 1.0
import QtMultimedia 5.4

TestCase {

    Component {
        id: cameraComponent
        Camera { }
    }

    Loader {
        id: cameraLoader
    }

    SignalSpy {
        id: deviceIdSpy
        target: cameraLoader.item
        signalName: "deviceIdChanged"
    }

    function test_deviceId() {
        deviceIdSpy.clear();
        cameraLoader.sourceComponent = cameraComponent;
        var camera = cameraLoader.item;

        // default camera
        compare(camera.deviceId, "othercamera", "deviceId");
        compare(camera.displayName, "othercamera desc", "displayName");
        compare(camera.position, Camera.UnspecifiedPosition, "position");
        compare(camera.orientation, 0, "orientation");

        // setting an invalid camera ID should leave the item unchanged
        camera.deviceId = "invalidcamera";
        compare(camera.deviceId, "othercamera");
        compare(deviceIdSpy.count, 0);
        compare(camera.displayName, "othercamera desc", "displayName");
        compare(camera.position, Camera.UnspecifiedPosition, "position");
        compare(camera.orientation, 0, "orientation");

        // change to another valid camera
        camera.deviceId = "backcamera";
        compare(camera.deviceId, "backcamera");
        compare(deviceIdSpy.count, 1);
        compare(camera.displayName, "backcamera desc", "displayName");
        compare(camera.position, Camera.BackFace, "position");
        compare(camera.orientation, 90, "orientation");

        // setting an empty device ID should load the default camera
        camera.deviceId = "";
        compare(camera.deviceId, "othercamera", "deviceId");
        compare(deviceIdSpy.count, 2);

        cameraLoader.sourceComponent = undefined;
    }

    function test_position() {
        deviceIdSpy.clear();
        cameraLoader.sourceComponent = cameraComponent;
        var camera = cameraLoader.item;

        // default camera
        compare(camera.position, Camera.UnspecifiedPosition, "position");
        compare(camera.deviceId, "othercamera", "deviceId");

        // setting an unavailable camera position should leave the item unchanged
        camera.position = Camera.FrontFace;
        compare(camera.position, Camera.UnspecifiedPosition, "position");
        compare(camera.deviceId, "othercamera", "deviceId");
        compare(deviceIdSpy.count, 0);

        // change to an available position
        camera.position = Camera.BackFace;
        compare(camera.position, Camera.BackFace, "position");
        compare(camera.deviceId, "backcamera", "deviceId");
        compare(deviceIdSpy.count, 1);

        // setting UnspecifiedPosition should load the default camera
        camera.position = Camera.UnspecifiedPosition;
        compare(camera.position, Camera.UnspecifiedPosition, "position");
        compare(camera.deviceId, "othercamera", "deviceId");
        compare(deviceIdSpy.count, 2);

        cameraLoader.sourceComponent = undefined;
    }

    SignalSpy {
        id: cameraStateSpy
        target: cameraLoader.item
        signalName: "cameraStateChanged"
    }

    function test_cameraState() {
        deviceIdSpy.clear();
        cameraStateSpy.clear();
        cameraLoader.sourceComponent = cameraComponent;
        var camera = cameraLoader.item;

        // camera should be in ActiveState by default
        compare(camera.cameraState, Camera.ActiveState, "cameraState");
        compare(camera.deviceId, "othercamera", "deviceId");

        // Changing the camera device should unload the previous camera and apply the current state
        // to the new camera
        camera.deviceId = "backcamera";
        compare(camera.deviceId, "backcamera", "deviceId");
        compare(camera.cameraState, Camera.ActiveState, "cameraState");
        compare(cameraStateSpy.count, 2);
        compare(cameraStateSpy.signalArguments[0][0], Camera.UnloadedState);
        compare(cameraStateSpy.signalArguments[1][0], Camera.ActiveState);

        cameraLoader.sourceComponent = undefined;
    }
}