t6022: New test checking for unnecessary updates of files in D/F conflicts

diff --git a/t/t1001-read-tree-m-2way.sh b/t/t1001-read-tree-m-2way.sh
index 6327d205cb89b00e77502031e3b56b4b895cc32d..93ca84f9e6d3dfd859d8bd4941f4d2c5a354ab6c 100755 (executable)
--- a/t/t1001-read-tree-m-2way.sh
+++ b/t/t1001-read-tree-m-2way.sh
@@ -359,7 +359,7 @@ test_expect_success \
 
 test_expect_success \
     'a/b (untracked) vs a, plus c/d case test.' \
-    '! git read-tree -u -m "$treeH" "$treeM" &&
+    'test_must_fail git read-tree -u -m "$treeH" "$treeM" &&
      git ls-files --stage &&
      test -f a/b'
 
@@ -390,4 +390,20 @@ test_expect_success \
      git ls-files --stage | tee >treeMcheck.out &&
      test_cmp treeM.out treeMcheck.out'
 
+test_expect_success '-m references the correct modified tree' '
+       echo >file-a &&
+       echo >file-b &&
+       git add file-a file-b &&
+       git commit -a -m "test for correct modified tree"
+       git branch initial-mod &&
+       echo b >file-b &&
+       git commit -a -m "B" &&
+       echo a >file-a &&
+       git add file-a &&
+       git ls-tree $(git write-tree) file-a >expect &&
+       git read-tree -m HEAD initial-mod &&
+       git ls-tree $(git write-tree) file-a >actual &&
+       test_cmp expect actual
+'
+
 test_done