Since d1c5f2a (Add git-am, applymbox replacement., 2005-10-07), git-am
supported the --utf8 and --no-utf8 options, and if set, would pass the
-u flag and the -k flag respectively.

git mailinfo -u will re-code the commit log message and authorship info
in the charset specified by i18n.commitencoding setting, while
git mailinfo -n will disable the re-coding.

Since d84029b (--utf8 is now default for 'git-am', 2007-01-08), --utf8
is set by default in git-am.

Add various encoding conversion tests to t3901 to test git-mailinfo's
encoding conversion. In addition, add a test for --no-utf8 to check that
no encoding conversion will occur if that option is set.

Cc: Junio C Hamano <gits...@pobox.com>
Signed-off-by: Paul Tan <pyoka...@gmail.com>
---
 t/t3901-i18n-patch.sh | 62 +++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 62 insertions(+)

diff --git a/t/t3901-i18n-patch.sh b/t/t3901-i18n-patch.sh
index 75cf3ff..b49bdb7 100755
--- a/t/t3901-i18n-patch.sh
+++ b/t/t3901-i18n-patch.sh
@@ -251,4 +251,66 @@ test_expect_success 'rebase --merge (L/U)' '
        check_encoding 2 8859
 '
 
+test_expect_success 'am (U/U)' '
+       # Apply UTF-8 patches with UTF-8 commitencoding
+       git config i18n.commitencoding UTF-8 &&
+       . "$TEST_DIRECTORY"/t3901-utf8.txt &&
+
+       git reset --hard master &&
+       git am out-u1 out-u2 &&
+
+       check_encoding 2
+'
+
+test_expect_success 'am (L/L)' '
+       # Apply ISO-8859-1 patches with ISO-8859-1 commitencoding
+       git config i18n.commitencoding ISO8859-1 &&
+       . "$TEST_DIRECTORY"/t3901-8859-1.txt &&
+
+       git reset --hard master &&
+       git am out-l1 out-l2 &&
+
+       check_encoding 2 8859
+'
+
+test_expect_success 'am (U/L)' '
+       # Apply ISO-8859-1 patches with UTF-8 commitencoding
+       git config i18n.commitencoding UTF-8 &&
+       . "$TEST_DIRECTORY"/t3901-utf8.txt &&
+       git reset --hard master &&
+
+       # am specifies --utf8 by default.
+       git am out-l1 out-l2 &&
+
+       check_encoding 2
+'
+
+test_expect_success 'am --no-utf8 (U/L)' '
+       # Apply ISO-8859-1 patches with UTF-8 commitencoding
+       git config i18n.commitencoding UTF-8 &&
+       . "$TEST_DIRECTORY"/t3901-utf8.txt &&
+
+       git reset --hard master &&
+       git am --no-utf8 out-l1 out-l2 2>err &&
+
+       # commit-tree will warn that the commit message does not contain valid 
UTF-8
+       # as mailinfo did not convert it
+       grep "did not conform" err &&
+
+       check_encoding 2
+'
+
+test_expect_success !MINGW 'am (L/U)' '
+       # Apply UTF-8 patches with ISO-8859-1 commitencoding
+       git config i18n.commitencoding ISO8859-1 &&
+       . "$TEST_DIRECTORY"/t3901-8859-1.txt &&
+
+       git reset --hard master &&
+       # mailinfo will re-code the commit message to the charset specified by
+       # i18n.commitencoding
+       git am out-u1 out-u2 &&
+
+       check_encoding 2 8859
+'
+
 test_done
-- 
2.5.0.rc1.81.gfe77482

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