test:

- Added continent zoom stretch test

Ref.: https://github.com/VolmitSoftware/Iris/issues/1251

core/src/test/java/art/arcane/iris/generation/terrain/ContinentGeneratorTest.java

@@ -17,22 +17,35 @@ import static org.mockito.Mockito.when;
 public class ContinentGeneratorTest {
     private static final long WORLD_SEED = 7L;
     private static final double POWER_OF_TWO_CONTINENT_ZOOM = 4D;
+    private static final double SQUARED_CONTINENT_ZOOM = POWER_OF_TWO_CONTINENT_ZOOM * POWER_OF_TWO_CONTINENT_ZOOM;
     private static final double[][] SAMPLE_BLOCKS = {{1000D, -2000D}, {12.5D, -7.25D}, {-517D, 333D}};
+    private static final double[][] BLOCKS_SHRUNK_BY_CONTINENT_ZOOM = shrinkByContinentZoom(SAMPLE_BLOCKS);
     private static final double[] CONTINENT_MAP_OF_EXISTING_WORLDS =
             {0.21889892332042843D, 0.6984934456740721D, 0.2708759584352327D};
 
     private final IrisData packData = createPackDataThatBelongsToOneRunningEngine();
     private final IrisDimension baseZoomDimension = createDimensionWithContinentZoom(POWER_OF_TWO_CONTINENT_ZOOM);
+    private final IrisDimension squaredZoomDimension = createDimensionWithContinentZoom(SQUARED_CONTINENT_ZOOM);
 
     @Test
     public void doesTheContinentMapAtWorldStartMatchExistingWorlds() {
         assertArrayEquals(CONTINENT_MAP_OF_EXISTING_WORLDS, sampleContinentMapAtWorldStart(baseZoomDimension), 0D);
     }
 
+    @Test
+    public void doesSquaredContinentZoomStretchTheContinentMapByTheBaseZoom() {
+        assertArrayEquals(sampleBaseContinentMapStretchedByBaseZoom(),
+                sampleContinentMapAtWorldStart(squaredZoomDimension), 0D);
+    }
+
     private double[] sampleContinentMapAtWorldStart(IrisDimension dimension) {
         return sampleContinentMap(dimension, SAMPLE_BLOCKS);
     }
 
+    private double[] sampleBaseContinentMapStretchedByBaseZoom() {
+        return sampleContinentMap(baseZoomDimension, BLOCKS_SHRUNK_BY_CONTINENT_ZOOM);
+    }
+
     private double[] sampleContinentMap(IrisDimension dimension, double[][] blocks) {
         return sampleAtBlocks(ContinentGenerator.create(dimension, new RNG(WORLD_SEED), packData), blocks);
     }
@@ -45,6 +58,14 @@ public class ContinentGeneratorTest {
         return continentGenerator.noise(block[0], block[1]);
     }
 
+    private static double[][] shrinkByContinentZoom(double[][] blocks) {
+        return Arrays.stream(blocks).map(block -> shrinkByContinentZoom(block)).toArray(double[][]::new);
+    }
+
+    private static double[] shrinkByContinentZoom(double[] block) {
+        return new double[]{block[0] / POWER_OF_TWO_CONTINENT_ZOOM, block[1] / POWER_OF_TWO_CONTINENT_ZOOM};
+    }
+
     private static IrisDimension createDimensionWithContinentZoom(double zoom) {
         return new IrisDimension().setContinentalStyle(createSimplexStyle()).setContinentZoom(zoom);
     }