1 files changed, 24 insertions, 0 deletions
diff --git a/src/test/java/gregtech/api/util/GTUtilityTest.java b/src/test/java/gregtech/api/util/GTUtilityTest.java
new file mode 100644
index 0000000000..bb6632cd41
--- /dev/null
+++ b/src/test/java/gregtech/api/util/GTUtilityTest.java
@@ -0,0 +1,24 @@
+package gregtech.api.util;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+import org.junit.jupiter.api.Test;
+
+import gregtech.api.enums.GTValues;
+
+public class GTUtilityTest {
+
+    @Test
+    public void testGetTier() {
+        assertEquals(0, GTUtility.getTier(-1));
+        assertEquals(0, GTUtility.getTier(1));
+        assertEquals(0, GTUtility.getTier(GTValues.V[0]));
+        for (int i = 1; i < 16; i++) {
+            assertEquals(
+                i,
+                GTUtility.getTier(GTValues.V[i - 1] + 1),
+                String.format("%d, %d", i, GTValues.V[i - 1] + 1));
+            assertEquals(i, GTUtility.getTier(GTValues.V[i]));
+        }
+    }
+}