From 8d38e1012eaefa19c4108e3e279c3a85fcc88bbc Mon Sep 17 00:00:00 2001
From: Tobias Warneke <t.warneke@gmx.net>
Date: Sat, 27 Feb 2021 01:32:45 +0100
Subject: [PATCH] first test with conflict output

---
 .../com/github/difflib/patch/PatchTest.java   | 45 +++++++++++++++++++
 1 file changed, 45 insertions(+)

diff --git a/java-diff-utils/src/test/java/com/github/difflib/patch/PatchTest.java b/java-diff-utils/src/test/java/com/github/difflib/patch/PatchTest.java
index 84208da..311b6aa 100644
--- a/java-diff-utils/src/test/java/com/github/difflib/patch/PatchTest.java
+++ b/java-diff-utils/src/test/java/com/github/difflib/patch/PatchTest.java
@@ -14,6 +14,7 @@ import java.util.List;
 import org.junit.jupiter.api.Test;
 
 import com.github.difflib.DiffUtils;
+import java.util.ArrayList;
 
 public class PatchTest {
 
@@ -78,4 +79,48 @@ public class PatchTest {
         }
 
     }
+
+    @Test
+    public void testPatch_Change_withExceptionProcessor() {
+        final List<String> changeTest_from = Arrays.asList("aaa", "bbb", "ccc", "ddd");
+        final List<String> changeTest_to = Arrays.asList("aaa", "bxb", "cxc", "ddd");
+
+        final Patch<String> patch = DiffUtils.diff(changeTest_from, changeTest_to);
+
+        changeTest_from.set(2, "CDC");
+
+        patch.withConflictOutput(new ConflictOutput<String>() {
+            @Override
+            public void processConflict(VerifyChunk verifyChunk, AbstractDelta<String> delta, List<String> result) throws PatchFailedException {
+                if (result.size() > delta.getSource().getPosition()) {
+                    List<String> orgData = new ArrayList<>();
+
+                    for (int i = 0; i < delta.getSource().size(); i++) {
+                        orgData.add(result.get(delta.getSource().getPosition()));
+                        result.remove(delta.getSource().getPosition());
+                    }
+
+                    orgData.add(0, "<<<<<< HEAD");
+                    orgData.add("======");
+                    orgData.addAll(delta.getSource().getLines());
+                    orgData.add(">>>>>>> PATCH");
+                    
+                    result.addAll(delta.getSource().getPosition(), orgData);
+
+                } else {
+                    throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
+                }
+            }
+        });
+
+        try {
+            List<String> data = DiffUtils.patch(changeTest_from, patch);
+            assertEquals(9, data.size());
+            
+            assertEquals(Arrays.asList("aaa", "<<<<<< HEAD", "bbb", "CDC", "======", "bbb", "ccc", ">>>>>>> PATCH", "ddd"), data);
+            
+        } catch (PatchFailedException e) {
+            fail(e.getMessage());
+        }
+    }
 }