/*
 * Copyright (C) 2009 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package android.hardware.cts;


import android.hardware.GeomagneticField;
import android.test.AndroidTestCase;

import java.util.GregorianCalendar;

public class GeomagneticFieldTest extends AndroidTestCase {
    // Chengdu: Latitude 30d 40' 12", Longitude 104d 3' 36"
    private static final float LATITUDE_OF_CHENGDU = 30.67f;
    private static final float LONGITUDE_OF_CHENGDU = 104.06f;
    private static final float ALTITUDE_OF_CHENGDU = 500f;
    private static final long TEST_TIME = new GregorianCalendar(2010, 5, 1).getTimeInMillis();

    public void testGeomagneticField() {
        GeomagneticField geomagneticField = new GeomagneticField(LATITUDE_OF_CHENGDU,
                LONGITUDE_OF_CHENGDU, ALTITUDE_OF_CHENGDU, TEST_TIME);

        // Reference values calculated from NOAA online calculator for WMM 2010,
        // and cross-checked in Matlab. The expected deltas are proportional to the
        // magnitude of each value.
        assertEquals(-1.867f, geomagneticField.getDeclination(), 0.1f);
        assertEquals(47.133f, geomagneticField.getInclination(), 1.0f);
        assertEquals(50375.6f, geomagneticField.getFieldStrength(), 100.0f);
        assertEquals(34269.3f, geomagneticField.getHorizontalStrength(), 100.0f);
        assertEquals(34251.2f, geomagneticField.getX(), 100.0f);
        assertEquals(-1113.2f, geomagneticField.getY(), 10.0f);
        assertEquals(36923.1f, geomagneticField.getZ(), 100.0f);
    }
}