tests: add initial bash completion tests

Signed-off-by: Felipe Contreras <felipe.contreras@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/t/t9902-completion.sh b/t/t9902-completion.sh
new file mode 100755 (executable)
index 0000000..a6eaa15
--- /dev/null
+++ b/t/t9902-completion.sh
@@ -0,0 +1,120 @@
+#!/bin/sh
+#
+# Copyright (c) 2012 Felipe Contreras
+#
+
+if test -n "$BASH" && test -z "$POSIXLY_CORRECT"; then
+       # we are in full-on bash mode
+       true
+elif type bash >/dev/null 2>&1; then
+       # execute in full-on bash mode
+       unset POSIXLY_CORRECT
+       exec bash "$0" "$@"
+else
+       echo '1..0 #SKIP skipping bash completion tests; bash not available'
+       exit 0
+fi
+
+test_description='test bash completion'
+
+. ./test-lib.sh
+
+complete ()
+{
+       # do nothing
+       return 0
+}
+
+. "$GIT_BUILD_DIR/contrib/completion/git-completion.bash"
+
+# We don't need this function to actually join words or do anything special.
+# Also, it's cleaner to avoid touching bash's internal completion variables.
+# So let's override it with a minimal version for testing purposes.
+_get_comp_words_by_ref ()
+{
+       while [ $# -gt 0 ]; do
+               case "$1" in
+               cur)
+                       cur=${_words[_cword]}
+                       ;;
+               prev)
+                       prev=${_words[_cword-1]}
+                       ;;
+               words)
+                       words=("${_words[@]}")
+                       ;;
+               cword)
+                       cword=$_cword
+                       ;;
+               esac
+               shift
+       done
+}
+
+print_comp ()
+{
+       local IFS=$'\n'
+       echo "${COMPREPLY[*]}" > out
+}
+
+run_completion ()
+{
+       local -a COMPREPLY _words
+       local _cword
+       _words=( $1 )
+       (( _cword = ${#_words[@]} - 1 ))
+       _git && print_comp
+}
+
+test_completion ()
+{
+       test $# -gt 1 && echo "$2" > expected
+       run_completion "$@" &&
+       test_cmp expected out
+}
+
+test_expect_success 'basic' '
+       run_completion "git \"\"" &&
+       # built-in
+       grep -q "^add \$" out &&
+       # script
+       grep -q "^filter-branch \$" out &&
+       # plumbing
+       ! grep -q "^ls-files \$" out &&
+
+       run_completion "git f" &&
+       ! grep -q -v "^f" out
+'
+
+test_expect_success 'double dash "git" itself' '
+       sed -e "s/Z$//" >expected <<-\EOF &&
+       --paginate Z
+       --no-pager Z
+       --git-dir=
+       --bare Z
+       --version Z
+       --exec-path Z
+       --html-path Z
+       --work-tree=
+       --namespace=
+       --help Z
+       EOF
+       test_completion "git --"
+'
+
+test_expect_success 'double dash "git checkout"' '
+       sed -e "s/Z$//" >expected <<-\EOF &&
+       --quiet Z
+       --ours Z
+       --theirs Z
+       --track Z
+       --no-track Z
+       --merge Z
+       --conflict=
+       --orphan Z
+       --patch Z
+       EOF
+       test_completion "git checkout --"
+'
+
+test_done