test-lib: limit the output of the yes utility

diff --git a/t/t3900-i18n-commit.sh b/t/t3900-i18n-commit.sh
index 37ddabba2d60956a4d8da63585bec5a622e12a5d..4bf1dbe9c9f3ffeb1151be07bf75dcd872167916 100755 (executable)
--- a/t/t3900-i18n-commit.sh
+++ b/t/t3900-i18n-commit.sh
@@ -34,11 +34,47 @@ test_expect_success 'no encoding header for base case' '
        test z = "z$E"
 '
 
-test_expect_failure 'UTF-16 refused because of NULs' '
+test_expect_success 'UTF-16 refused because of NULs' '
        echo UTF-16 >F &&
-       git commit -a -F "$TEST_DIRECTORY"/t3900/UTF-16.txt
+       test_must_fail git commit -a -F "$TEST_DIRECTORY"/t3900/UTF-16.txt
 '
 
+test_expect_success 'UTF-8 invalid characters refused' '
+       test_when_finished "rm -f $HOME/stderr $HOME/invalid" &&
+       echo "UTF-8 characters" >F &&
+       printf "Commit message\n\nInvalid surrogate:\355\240\200\n" \
+               >"$HOME/invalid" &&
+       git commit -a -F "$HOME/invalid" 2>"$HOME"/stderr &&
+       grep "did not conform" "$HOME"/stderr
+'
+
+test_expect_success 'UTF-8 overlong sequences rejected' '
+       test_when_finished "rm -f $HOME/stderr $HOME/invalid" &&
+       rm -f "$HOME/stderr" "$HOME/invalid" &&
+       echo "UTF-8 overlong" >F &&
+       printf "\340\202\251ommit message\n\nThis is not a space:\300\240\n" \
+               >"$HOME/invalid" &&
+       git commit -a -F "$HOME/invalid" 2>"$HOME"/stderr &&
+       grep "did not conform" "$HOME"/stderr
+'
+
+test_expect_success 'UTF-8 non-characters refused' '
+       test_when_finished "rm -f $HOME/stderr $HOME/invalid" &&
+       echo "UTF-8 non-character 1" >F &&
+       printf "Commit message\n\nNon-character:\364\217\277\276\n" \
+               >"$HOME/invalid" &&
+       git commit -a -F "$HOME/invalid" 2>"$HOME"/stderr &&
+       grep "did not conform" "$HOME"/stderr
+'
+
+test_expect_success 'UTF-8 non-characters refused' '
+       test_when_finished "rm -f $HOME/stderr $HOME/invalid" &&
+       echo "UTF-8 non-character 2." >F &&
+       printf "Commit message\n\nNon-character:\357\267\220\n" \
+               >"$HOME/invalid" &&
+       git commit -a -F "$HOME/invalid" 2>"$HOME"/stderr &&
+       grep "did not conform" "$HOME"/stderr
+'
 
 for H in ISO8859-1 eucJP ISO-2022-JP
 do