From d4091a34c5c112a41d14419365027fc0281b105d Mon Sep 17 00:00:00 2001
From: claude-bot <pit.friedrich@ok.de>
Date: Sat, 25 Jul 2026 08:54:07 +0000
Subject: [PATCH] fix: correct file content encoding (#3)

---
 .../example/util/SubtractFunctionTest.java    | 31 ++++++++++++++++++-
 1 file changed, 30 insertions(+), 1 deletion(-)

diff --git a/src/test/java/com/example/util/SubtractFunctionTest.java b/src/test/java/com/example/util/SubtractFunctionTest.java
index 871ec1c..e8a8342 100644
--- a/src/test/java/com/example/util/SubtractFunctionTest.java
+++ b/src/test/java/com/example/util/SubtractFunctionTest.java
@@ -1 +1,30 @@
-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
\ No newline at end of file
+package com.example.util;
+
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+class SubtractFunctionTest {
+
+    private final SubtractFunction subtractFunction = new SubtractFunction();
+
+    @Test
+    void subtractsMultipleValues() {
+        assertEquals(1.0, subtractFunction.calc(6.0, 2.0, 3.0));
+    }
+
+    @Test
+    void returnsSingleValue() {
+        assertEquals(5.0, subtractFunction.calc(5.0));
+    }
+
+    @Test
+    void returnsZeroForNoInput() {
+        assertEquals(0.0, subtractFunction.calc());
+    }
+
+    @Test
+    void subtractsNegativeValues() {
+        assertEquals(3.0, subtractFunction.calc(1.0, -2.0));
+    }
+}