Tests: add MercatorProjectionTest

Author: Binnette

app/src/test/java/net/osmtracker/util/MercatorProjectionTest.java

@@ -0,0 +1,77 @@
+package net.osmtracker.util;
+
+import static org.junit.Assert.*;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.junit.runners.Parameterized;
+
+import java.util.Arrays;
+import java.util.Collection;
+
+@RunWith(Parameterized.class)
+public class MercatorProjectionTest {
+
+    @Parameterized.Parameter(0)
+    public double minLat;
+
+    @Parameterized.Parameter(1)
+    public double lat;
+
+    @Parameterized.Parameter(2)
+    public double maxLat;
+
+    @Parameterized.Parameter(3)
+    public double minLon;
+
+    @Parameterized.Parameter(4)
+    public double lon;
+
+    @Parameterized.Parameter(5)
+    public double maxLon;
+
+    @Parameterized.Parameter(6)
+    public int expectedX;
+
+    @Parameterized.Parameter(7)
+    public int expectedY;
+
+    @Parameterized.Parameter(8)
+    public double expectedScale;
+
+    @Parameterized.Parameter(9)
+    public Float degre;
+
+    @Parameterized.Parameter(10)
+    public boolean isLat;
+
+    @Parameterized.Parameter(11)
+    public String expectedDms;
+
+    @Parameterized.Parameters
+    public static Collection<Object[]> data() {
+        return Arrays.asList(new Object[][] {
+            { -89, -83.83, -80, /**/ -180, -171.171, -160, /**/ 323, 879, /**/ 0.0315, -83.83f,  true, "83° 49' 48\" S" },
+            { -45, -42.45, -40, /**/  170,  175.175,  180, /**/ 373, 630, /**/ 0.0138, -42.45f, false, "42° 27' 0\" W" },
+            {  45,  48.48,  50, /**/ -160, -151.151, -150, /**/ 637, 541, /**/ 0.0138,  48.48f,  true, "48° 28' 47\" N" },
+            {  80,  82.82,  85, /**/  110,  111.111,  120, /**/ 235, 668, /**/ 0.0311,  82.82f, false, "82° 49' 11\" E" },
+            {  89,  89.89,  90, /**/  111,  111.111,  112, /**/  80, 640, /**/ 0.0013,    null, true, "" }
+        });
+    }
+
+    @Test
+    public void testProject() {
+        MercatorProjection projection = new MercatorProjection(minLat, minLon, maxLat, maxLon, 720, 1280);
+        int[] point = projection.project(lon, lat);
+        assertNotNull(point);
+        assertEquals(expectedX, point[MercatorProjection.X]);
+        assertEquals(expectedY, point[MercatorProjection.Y]);
+        assertEquals(expectedScale, projection.getScale(), 0.0001);
+    }
+
+    @Test
+    public void testFormatDegreesAsDMS() {
+        String formattedDms = MercatorProjection.formatDegreesAsDMS(degre, isLat);
+        assertEquals(expectedDms, formattedDms);
+    }
+
+}