From ec6a5779b2b237c5585817994ce1fd75a1ba2a39 Mon Sep 17 00:00:00 2001
From: Mark Amery <markrobertamery@gmail.com>
Date: Mon, 7 Apr 2025 11:42:42 +0100
Subject: [PATCH] Add test for case where oldHeader and newHeader are omitted
 in structuredPatch call

---
 test/patch/create.js | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/test/patch/create.js b/test/patch/create.js
index d4cdaf76..469f8df1 100644
--- a/test/patch/create.js
+++ b/test/patch/create.js
@@ -881,6 +881,21 @@ describe('patch/create', function() {
       );
     });
 
+    it('sets oldHeader and newHeader to undefined if they are not provided', function() {
+      const res = structuredPatch(
+        'oldfile', 'newfile',
+        'line2\nline3\nline4\n', 'line2\nline3\nline5'
+      );
+      expect(res).to.eql({
+        oldFileName: 'oldfile', newFileName: 'newfile',
+        oldHeader: undefined, newHeader: undefined,
+        hunks: [{
+          oldStart: 1, oldLines: 3, newStart: 1, newLines: 3,
+          lines: [' line2', ' line3', '-line4', '+line5', '\\ No newline at end of file']
+        }]
+      });
+    });
+
     describe('given options.maxEditLength', function() {
       const options = { maxEditLength: 1 };