RegionChooser: Testing RegionExtractor for GSK3 models

test/eu/simstadt/regionchooser/test/RegionExtractorTests.java

+package eu.simstadt.regionchooser.test;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertTrue;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import org.junit.Test;
+import eu.simstadt.regionchooser.RegionExtractor;
+
+
+public class RegionExtractorTests
+{
+	public static int countSubstring(String str, String subStr) {
+		return (str.length() - str.replace(subStr, "").length()) / subStr.length();
+	}
+
+	@Test
+	public void testExtract3BuildingsFromGSK3Model() throws Throwable {
+		//NOTE: Small region around Martinskirche in Grünbühl
+		String wktPolygon = "POLYGON((3515848.896028535 5415823.108586172,3515848.9512289143 5415803.590347393,3515829.0815150724 5415803.338023346,3515830.9784850604 5415793.437034622,3515842.0946056456 5415793.272282251,3515843.3515515197 5415766.204935087,3515864.1064344468 5415766.557899496,3515876.489172751 5415805.433782301,3515876.343844858 5415822.009293416,3515848.896028535 5415823.108586172))";
+		Path repo = Paths.get("../TestRepository");
+		Path citygmlPath = repo.resolve("Gruenbuehl.proj\\20140218_Gruenbuehl_LOD2.gml");
+		String churchGMLString = RegionExtractor.selectRegionDirectlyFromCityGML(citygmlPath, wktPolygon).toString();
+		assertEquals(countSubstring(churchGMLString, "<core:cityObjectMember"), 3);
+		assertTrue(churchGMLString.contains("Donaustr"));
+		assertTrue(churchGMLString.contains("DEBW_LOD2_203056"));
+		assertTrue(churchGMLString.contains("DEBW_LOD2_2869"));
+		assertTrue(churchGMLString.contains("DEBW_LOD2_2909"));
+	}
+}