1 files changed, 21 insertions, 0 deletions
diff --git a/t/stdin-no-operand b/t/stdin-no-operand
new file mode 100755
index 0000000..54a3cb4
--- /dev/null
+++ b/t/stdin-no-operand
@@ -0,0 +1,21 @@
+#!/bin/sh -e
+. t/common.sh
+
+printf '%s\n' > file \
+	"${HEAD} HEAD" \
+	same \
+	"${TAIL}" \
+	same \
+	"${END} branch"
+
+printf '%s\n' > file.expected \
+	same
+
+cp -- file input
+normal --reduce < input > output
+cmp -s -- file input
+diff -u -- output file.expected >&2
+
+also_interactive r < input > output
+cmp -s -- file input
+diff -u -- output file.expected >&2