From 1ec02587b00a22913127d015d6abfdcc335883ff Mon Sep 17 00:00:00 2001
From: Sven van Heugten <sven@memcmp.org>
Date: Fri, 6 Mar 2026 04:42:31 +0100
Subject: [PATCH] Demonstrate that the index isn't restored

```git-check-assertions
run ./test/git-check-assertions.bats
assert_failure
assert_output --partial "not ok 9 should restore index when finished"
assert_output --partial "not ok 10 should restore index between commits"
assert_output --partial "not ok 11 should restore index after a failure"
assert_output --partial "not ok 13 you can use git checkout in an assertion to assert against a mixed version of the code"
```
---
 test/git-check-assertions.bats | 32 ++++++++++++++++++++++++++++++++
 1 file changed, 32 insertions(+)

diff --git a/test/git-check-assertions.bats b/test/git-check-assertions.bats
index beb29ca..ee5097b 100755
--- a/test/git-check-assertions.bats
+++ b/test/git-check-assertions.bats
@@ -129,6 +129,37 @@ commit_with_assertion() {
   assert_size_zero readme
 }
 
+@test "should restore index when finished" {
+  git checkout -b feature
+  commit_with_assertion $'echo blah >> readme\ngit add readme'
+
+  run git-check-assertions
+
+  assert_success
+  assert_size_zero readme
+}
+
+@test "should restore index between commits" {
+  git checkout -b feature
+  commit_with_assertion $'echo blah >> readme\ngit add readme'
+  commit_with_assertion 'cp readme ../test'
+
+  run git-check-assertions
+
+  assert_success
+  assert_size_zero ../test
+}
+
+@test "should restore index after a failure" {
+  git checkout -b feature
+  commit_with_assertion $'echo blah >> readme\ngit add readme\nexit 3'
+
+  run git-check-assertions
+
+  assert_failure
+  assert_size_zero readme
+}
+
 @test "assertions should run against the version of the code inside of the commit" {
   git checkout -b feature
   echo commit1 >readme
@@ -157,6 +188,7 @@ commit_with_assertion() {
   run git-check-assertions
 
   assert_success
+  assert_file_contains src goodbye
 }
 
 @test "assert_success should succeed if the executed command succeeded" {