t3501 had a testcase originally added to ensure cherry-pick wouldn't
segfault when working with a dirty file involved in a rename.  While
the segfault was fixed, there was another problem this test demonstrated:
namely, that git would overwrite a dirty file involved in a rename.
Further, the test encoded a "successful merge" and overwriting of this
file as correct behavior.  Modify the test so that it would still catch
the segfault, but to require the correct behavior.

t7607 had a test specific to looking for a merge overwriting a dirty file
involved in a rename, but it too actually encoded what I would term
incorrect behavior: it expected the merge to succeed.  Fix that, and add
a few more checks to make sure that the merge really does produce the
expected results.

Signed-off-by: Elijah Newren <new...@gmail.com>
---
 t/t3501-revert-cherry-pick.sh | 7 +++++--
 t/t7607-merge-overwrite.sh    | 5 ++++-
 2 files changed, 9 insertions(+), 3 deletions(-)

diff --git a/t/t3501-revert-cherry-pick.sh b/t/t3501-revert-cherry-pick.sh
index 4f2a263b63..783bdbf59d 100755
--- a/t/t3501-revert-cherry-pick.sh
+++ b/t/t3501-revert-cherry-pick.sh
@@ -141,7 +141,7 @@ test_expect_success 'cherry-pick "-" works with arguments' '
        test_cmp expect actual
 '
 
-test_expect_success 'cherry-pick works with dirty renamed file' '
+test_expect_failure 'cherry-pick works with dirty renamed file' '
        test_commit to-rename &&
        git checkout -b unrelated &&
        test_commit unrelated &&
@@ -150,7 +150,10 @@ test_expect_success 'cherry-pick works with dirty renamed 
file' '
        test_tick &&
        git commit -m renamed &&
        echo modified >renamed &&
-       git cherry-pick refs/heads/unrelated
+       test_must_fail git cherry-pick refs/heads/unrelated >out &&
+       test_i18ngrep "Refusing to lose dirty file at renamed" out &&
+       test $(git rev-parse :0:renamed) = $(git rev-parse HEAD^:to-rename.t) &&
+       grep -q "^modified$" renamed
 '
 
 test_done
diff --git a/t/t7607-merge-overwrite.sh b/t/t7607-merge-overwrite.sh
index 9444d6a9b9..00617dadf8 100755
--- a/t/t7607-merge-overwrite.sh
+++ b/t/t7607-merge-overwrite.sh
@@ -97,7 +97,10 @@ test_expect_failure 'will not overwrite unstaged changes in 
renamed file' '
        git mv c1.c other.c &&
        git commit -m rename &&
        cp important other.c &&
-       git merge c1a &&
+       test_must_fail git merge c1a >out &&
+       test_i18ngrep "Refusing to lose dirty file at other.c" out &&
+       test -f other.c~HEAD &&
+       test $(git hash-object other.c~HEAD) = $(git rev-parse c1a:c1.c) &&
        test_cmp important other.c
 '
 
-- 
2.15.0.5.g9567be9905

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