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/*
* Copyright (C) 2020 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 com.android.timezone.location.storage.s2;
import static com.android.timezone.location.storage.s2.S2CellOrdering.asUnsignedNumeric;
import static com.android.timezone.location.storage.s2.S2Support.MAX_FACE_ID;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;
import org.junit.Test;
/** Tests for {@link S2CellOrdering}. */
public class S2CellOrderingTest {
@Test
public void ordering() {
for (int level = 0; level <= S2Support.MAX_S2_LEVEL; level++) {
long minCellIdNumeric = S2CellOrdering.getMinCellIdNumeric(level);
long maxCellIdNumeric = S2CellOrdering.getMaxCellIdNumeric(level);
for (int faceId = 0; faceId <= S2Support.MAX_FACE_ID; faceId++) {
long faceMinCellIdNumeric = asUnsignedNumeric(S2Support.cellId(level, faceId, 0));
long faceMaxCellIdNumeric = asUnsignedNumeric(
S2Support.cellId(level, faceId, S2Support.getMaxIndex(level)));
if (level == 0) {
// level 0, index is always zero: there's just one cell ID per face.
assertEquals("level=" + level + ", faceId=" + faceId,
faceMinCellIdNumeric, faceMaxCellIdNumeric);
} else {
assertTrue("level=" + level + ", faceId=" + faceId,
faceMinCellIdNumeric < faceMaxCellIdNumeric);
}
if (faceId == 0) {
assertEquals("level=" + level + ", faceId=" + faceId,
minCellIdNumeric, faceMinCellIdNumeric);
} else {
assertTrue("level=" + level + ", faceId=" + faceId,
minCellIdNumeric < faceMinCellIdNumeric);
}
if (faceId == MAX_FACE_ID) {
assertEquals("level=" + level + ", faceId=" + faceId,
maxCellIdNumeric, faceMaxCellIdNumeric);
} else {
assertTrue("level=" + level + ", faceId=" + faceId,
maxCellIdNumeric > faceMaxCellIdNumeric);
}
}
}
}
}
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