Make planetiler-openmaptiles runnable as a standalone project (#19)

src/test/java/org/openmaptiles/util/VerifyMonacoTest.java

@@ -0,0 +1,64 @@
+package org.openmaptiles.util;
+
+import static com.onthegomap.planetiler.geo.GeoUtils.point;
+import static com.onthegomap.planetiler.util.Gzip.gzip;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+import com.onthegomap.planetiler.VectorTile;
+import com.onthegomap.planetiler.geo.TileCoord;
+import com.onthegomap.planetiler.mbtiles.Mbtiles;
+import com.onthegomap.planetiler.mbtiles.TileEncodingResult;
+import java.io.IOException;
+import java.util.List;
+import java.util.Map;
+import java.util.OptionalLong;
+import org.junit.jupiter.api.AfterEach;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+
+class VerifyMonacoTest {
+
+  private Mbtiles mbtiles;
+
+  @BeforeEach
+  public void setup() {
+    mbtiles = Mbtiles.newInMemoryDatabase();
+  }
+
+  @AfterEach
+  public void teardown() throws IOException {
+    mbtiles.close();
+  }
+
+  @Test
+  void testEmptyFileInvalid() {
+    assertInvalid(mbtiles);
+  }
+
+  @Test
+  void testEmptyTablesInvalid() {
+    mbtiles.createTablesWithIndexes();
+    assertInvalid(mbtiles);
+  }
+
+  @Test
+  void testStilInvalidWithOneTile() throws IOException {
+    mbtiles.createTablesWithIndexes();
+    mbtiles.metadata().setName("name");
+    try (var writer = mbtiles.newBatchedTileWriter()) {
+      VectorTile tile = new VectorTile();
+      tile.addLayerFeatures("layer", List.of(new VectorTile.Feature(
+        "layer",
+        1,
+        VectorTile.encodeGeometry(point(0, 0)),
+        Map.of()
+      )));
+      writer.write(new TileEncodingResult(TileCoord.ofXYZ(0, 0, 0), gzip(tile.encode()), OptionalLong.empty()));
+    }
+    assertInvalid(mbtiles);
+  }
+
+  private void assertInvalid(Mbtiles mbtiles) {
+    assertTrue(VerifyMonaco.verify(mbtiles).numErrors() > 0);
+  }
+}