Add rebase test for when upstream has deleted a non-ASCII file

Test that stg rebase can handle upstream deleting a file with a
non-ASCII name. It currently can't.

Bug spotted by Jakub Narebski <jnareb@gmail.com>.

Signed-off-by: Karl Hasselström <kha@treskal.com>

diff --git a/t/t3200-non-ascii-filenames.sh b/t/t3200-non-ascii-filenames.sh
new file mode 100755
index 0000000..1d82a9f
--- /dev/null
+++ b/t/t3200-non-ascii-filenames.sh
@@ -0,0 +1,27 @@
+#!/bin/sh
+test_description='Handle files with non-ASCII characters in their names'
+
+. ./test-lib.sh
+
+test_expect_success 'Setup' '
+    echo "Fjäderholmarna" > skärgårdsö.txt &&
+    git add skärgårdsö.txt &&
+    git commit -m "Create island" &&
+    stg init &&
+    echo foo > unrelated.txt &&
+    git add unrelated.txt &&
+    stg new -m "Unrelated file" &&
+    stg refresh &&
+    stg pop &&
+    rm skärgårdsö.txt &&
+    git commit -a -m "Remove island" &&
+    git tag upstream &&
+    git reset --hard HEAD^ &&
+    stg push
+'
+
+test_expect_failure 'Rebase onto changed non-ASCII file' '
+    stg rebase upstream
+'
+
+test_done