From eaa3ce81991563ba8993a45f54f30cd73b075755 Mon Sep 17 00:00:00 2001
From: Mark Amery <markrobertamery@gmail.com>
Date: Wed, 27 Dec 2023 13:52:25 +0000
Subject: [PATCH 1/2] Fix a trivial code formatting inconsistency

---
 test/patch/apply.js | 1 +
 1 file changed, 1 insertion(+)

diff --git a/test/patch/apply.js b/test/patch/apply.js
index d5b06ace..baae010c 100755
--- a/test/patch/apply.js
+++ b/test/patch/apply.js
@@ -525,6 +525,7 @@ describe('patch/apply', function() {
           + ' line5\n'))
         .to.equal(false);
     });
+
     it('should succeed within fuzz factor', function() {
       expect(applyPatch(
           'line2\n'

From 723a2f71f368131f50754298f81e4e136887652d Mon Sep 17 00:00:00 2001
From: Mark Amery <markrobertamery@gmail.com>
Date: Wed, 27 Dec 2023 14:00:08 +0000
Subject: [PATCH 2/2] Add test showing patch from bug
 https://github.com/kpdecker/jsdiff/issues/177 is handled correctly now

---
 test/patch/apply.js | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/test/patch/apply.js b/test/patch/apply.js
index baae010c..266f2adc 100755
--- a/test/patch/apply.js
+++ b/test/patch/apply.js
@@ -737,6 +737,24 @@ describe('patch/apply', function() {
 
       expect(applyPatch(oldContent, patch)).to.equal(newContent);
     });
+
+    // Regression test based on bug https://github.com/kpdecker/jsdiff/issues/177
+    it('should correctly apply a patch that truncates an entire file', function() {
+      const patch = parsePatch(
+        '===================================================================\n'
+        + '--- index.js\n'
+        + '+++ index.js\n'
+        + '@@ -1,3 +1,0 @@\n'
+        + '-this\n'
+        + '-\n'
+        + '-tos\n'
+        + '\\ No newline at end of file\n'
+      );
+      const fileContents = 'this\n\ntos';
+
+      expect(applyPatch(fileContents, patch))
+        .to.equal('');
+    });
   });
 
   describe('#applyPatches', function() {