completion: refactor __gitcomp related tests

Remove lots of duplicated code; no functional changes intended.

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

t/t9902-completion.sh

@@ -72,87 +72,65 @@ test_completion ()
 
 newline=$'\n'
 
+# Test __gitcomp.
+# The first argument is the typed text so far (cur); the rest are
+# passed to __gitcomp.  Expected output comes is read from the
+# standard input, like test_completion().
+test_gitcomp ()
+{
+	sed -e 's/Z$//' >expected &&
+	(
+		local -a COMPREPLY &&
+		cur="$1" &&
+		shift &&
+		__gitcomp "$@" &&
+		IFS="$newline" &&
+		echo "${COMPREPLY[*]}" >out
+	) &&
+	test_cmp expected out
+}
+
 test_expect_success '__gitcomp - trailing space - options' '
-	sed -e "s/Z$//" >expected <<-\EOF &&
+	test_gitcomp "--re" "--dry-run --reuse-message= --reedit-message=
+		--reset-author" <<-EOF
 	--reuse-message=Z
 	--reedit-message=Z
 	--reset-author Z
 	EOF
-	(
-		local -a COMPREPLY &&
-		cur="--re" &&
-		__gitcomp "--dry-run --reuse-message= --reedit-message=
-				--reset-author" &&
-		IFS="$newline" &&
-		echo "${COMPREPLY[*]}" > out
-	) &&
-	test_cmp expected out
 '
 
 test_expect_success '__gitcomp - trailing space - config keys' '
-	sed -e "s/Z$//" >expected <<-\EOF &&
+	test_gitcomp "br" "branch. branch.autosetupmerge
+		branch.autosetuprebase browser." <<-\EOF
 	branch.Z
 	branch.autosetupmerge Z
 	branch.autosetuprebase Z
 	browser.Z
 	EOF
-	(
-		local -a COMPREPLY &&
-		cur="br" &&
-		__gitcomp "branch. branch.autosetupmerge
-				branch.autosetuprebase browser." &&
-		IFS="$newline" &&
-		echo "${COMPREPLY[*]}" > out
-	) &&
-	test_cmp expected out
 '
 
 test_expect_success '__gitcomp - option parameter' '
-	sed -e "s/Z$//" >expected <<-\EOF &&
+	test_gitcomp "--strategy=re" "octopus ours recursive resolve subtree" \
+		"" "re" <<-\EOF
 	recursive Z
 	resolve Z
 	EOF
-	(
-		local -a COMPREPLY &&
-		cur="--strategy=re" &&
-		__gitcomp "octopus ours recursive resolve subtree
-			" "" "re" &&
-		IFS="$newline" &&
-		echo "${COMPREPLY[*]}" > out
-	) &&
-	test_cmp expected out
 '
 
 test_expect_success '__gitcomp - prefix' '
-	sed -e "s/Z$//" >expected <<-\EOF &&
+	test_gitcomp "branch.me" "remote merge mergeoptions rebase" \
+		"branch.maint." "me" <<-\EOF
 	branch.maint.merge Z
 	branch.maint.mergeoptions Z
 	EOF
-	(
-		local -a COMPREPLY &&
-		cur="branch.me" &&
-		__gitcomp "remote merge mergeoptions rebase
-			" "branch.maint." "me" &&
-		IFS="$newline" &&
-		echo "${COMPREPLY[*]}" > out
-	) &&
-	test_cmp expected out
 '
 
 test_expect_success '__gitcomp - suffix' '
-	sed -e "s/Z$//" >expected <<-\EOF &&
+	test_gitcomp "branch.me" "master maint next pu" "branch." \
+		"ma" "." <<-\EOF
 	branch.master.Z
 	branch.maint.Z
 	EOF
-	(
-		local -a COMPREPLY &&
-		cur="branch.me" &&
-		__gitcomp "master maint next pu
-			" "branch." "ma" "." &&
-		IFS="$newline" &&
-		echo "${COMPREPLY[*]}" > out
-	) &&
-	test_cmp expected out
 '
 
 test_expect_success 'basic' '