From 7e73e8f599e542499f583feed445c76cf4d7a417 Mon Sep 17 00:00:00 2001
From: CeeVeeR <ceeveer@protonmail.com>
Date: Fri, 2 Oct 2026 05:12:47 +0200
Subject: [PATCH] test:

- Added rebuild test, expected to fail until the fix

Ref.: https://github.com/VolmitSoftware/Iris/issues/1251
---
 .../terrain/ContinentGeneratorTest.java       | 20 +++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/core/src/test/java/art/arcane/iris/generation/terrain/ContinentGeneratorTest.java b/core/src/test/java/art/arcane/iris/generation/terrain/ContinentGeneratorTest.java
index 21f3edac6..d1588f6d0 100644
--- a/core/src/test/java/art/arcane/iris/generation/terrain/ContinentGeneratorTest.java
+++ b/core/src/test/java/art/arcane/iris/generation/terrain/ContinentGeneratorTest.java
@@ -4,8 +4,11 @@ import art.arcane.iris.generation.noise.IrisGeneratorStyle;
 import art.arcane.iris.generation.noise.NoiseStyle;
 import art.arcane.iris.generation.runtime.Engine;
 import art.arcane.iris.pack.loading.IrisData;
+import art.arcane.iris.testsupport.ExpectedToFailUntilFixed;
+import art.arcane.iris.testsupport.ExpectedToFailUntilFixedRule;
 import art.arcane.volmlib.util.math.RNG;
 import art.arcane.volmlib.util.noise.CNG;
+import org.junit.Rule;
 import org.junit.Test;
 
 import java.util.Arrays;
@@ -15,6 +18,9 @@ import static org.mockito.Mockito.mock;
 import static org.mockito.Mockito.when;
 
 public class ContinentGeneratorTest {
+    private static final String SHARED_STYLE_GENERATOR_BUG =
+            "ContinentGenerator scales the shared style generator instead of a private one. "
+                    + "Ref.: https://github.com/VolmitSoftware/Iris/issues/1251";
     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;
@@ -27,6 +33,9 @@ public class ContinentGeneratorTest {
     private final IrisDimension baseZoomDimension = createDimensionWithContinentZoom(POWER_OF_TWO_CONTINENT_ZOOM);
     private final IrisDimension squaredZoomDimension = createDimensionWithContinentZoom(SQUARED_CONTINENT_ZOOM);
 
+    @Rule
+    public final ExpectedToFailUntilFixedRule expectedFailures = new ExpectedToFailUntilFixedRule();
+
     @Test
     public void doesTheContinentMapAtWorldStartMatchExistingWorlds() {
         assertArrayEquals(CONTINENT_MAP_OF_EXISTING_WORLDS, sampleContinentMapAtWorldStart(baseZoomDimension), 0D);
@@ -38,6 +47,12 @@ public class ContinentGeneratorTest {
                 sampleContinentMapAtWorldStart(squaredZoomDimension), 0D);
     }
 
+    @ExpectedToFailUntilFixed(SHARED_STYLE_GENERATOR_BUG)
+    @Test
+    public void doesRebuildingTheSameWorldZoomItsContinentMapOnlyOnce() {
+        assertArrayEquals(CONTINENT_MAP_OF_EXISTING_WORLDS, sampleContinentMapAfterRebuild(baseZoomDimension), 0D);
+    }
+
     private double[] sampleContinentMapAtWorldStart(IrisDimension dimension) {
         return sampleContinentMap(dimension, SAMPLE_BLOCKS);
     }
@@ -46,6 +61,11 @@ public class ContinentGeneratorTest {
         return sampleContinentMap(baseZoomDimension, BLOCKS_SHRUNK_BY_CONTINENT_ZOOM);
     }
 
+    private double[] sampleContinentMapAfterRebuild(IrisDimension dimension) {
+        sampleContinentMapAtWorldStart(dimension);
+        return sampleContinentMapAtWorldStart(dimension);
+    }
+
     private double[] sampleContinentMap(IrisDimension dimension, double[][] blocks) {
         return sampleAtBlocks(ContinentGenerator.create(dimension, new RNG(WORLD_SEED), packData), blocks);
     }