From 400e76382a03c5190893caaac33c91b7114b00f3 Mon Sep 17 00:00:00 2001
From: Daniar Mannanov <daniar@dev.tatar>
Date: Tue, 11 Aug 2026 14:01:40 +0300
Subject: [PATCH] Report fixture ore schedules

---
 .../world/ore_schedule_diagnostic_test.go     | 60 +++++++++++++++++++
 1 file changed, 60 insertions(+)
 create mode 100644 internal/world/ore_schedule_diagnostic_test.go

diff --git a/internal/world/ore_schedule_diagnostic_test.go b/internal/world/ore_schedule_diagnostic_test.go
new file mode 100644
index 0000000..fc8bf10
--- /dev/null
+++ b/internal/world/ore_schedule_diagnostic_test.go
@@ -0,0 +1,60 @@
+package world
+
+import (
+	"os"
+	"testing"
+
+	"regionio/internal/worldgen"
+)
+
+func TestOreScheduleDiagnostic(t *testing.T) {
+	if os.Getenv("REGIONIO_ORE_SCHEDULE_DIAGNOSTIC") != "1" {
+		t.Skip("set REGIONIO_ORE_SCHEDULE_DIAGNOSTIC=1 to print ore schedules")
+	}
+	seed := int64(12345)
+	od, err := worldgen.LoadOverworldFinalDensity(seed)
+	if err != nil {
+		t.Fatal(err)
+	}
+	fluidPicker := worldgen.OverworldFluidPicker(od.SeaLevel)
+	veins := worldgen.NewOreVeinifier(od)
+	carver, err := worldgen.NewCarver(od, seed)
+	if err != nil {
+		t.Fatal(err)
+	}
+	for _, target := range []decorationSource{{0, 0}, {1, 0}, {0, 1}, {-1, -1}} {
+		var chunks []*Chunk
+		for cx := target.X - 1; cx <= target.X+1; cx++ {
+			for cz := target.Z - 1; cz <= target.Z+1; cz++ {
+				chunks = append(chunks, generateVanillaWithoutDecoration(od, fluidPicker, veins, carver, seed, cx, cz))
+			}
+		}
+		region, err := newDecorationRegion(chunks)
+		if err != nil {
+			t.Fatal(err)
+		}
+		if err := region.setSource(target.X, target.Z); err != nil {
+			t.Fatal(err)
+		}
+		schedule, err := region.scheduledFeatures(undergroundOresStage)
+		if err != nil {
+			t.Fatal(err)
+		}
+		t.Logf("source (%d,%d) biomes=%v", target.X, target.Z, region.sourceBiomes())
+		for _, feature := range schedule {
+			placed := mustFeatureSet(t).Placed[feature.Name]
+			if mustFeatureSet(t).Configured[placed.Feature].Type == "minecraft:ore" {
+				t.Logf("source (%d,%d) %s index=%d", target.X, target.Z, feature.Name, feature.Index)
+			}
+		}
+	}
+}
+
+func mustFeatureSet(t *testing.T) *worldgen.FeatureSet {
+	t.Helper()
+	set, err := worldgen.LoadFeatureSet()
+	if err != nil {
+		t.Fatal(err)
+	}
+	return set
+}