diff --git a/test.sh b/test.sh
new file mode 100755
index 0000000..67fdbcf
--- /dev/null
+++ b/test.sh
@@ -0,0 +1,55 @@
+#!/bin/bash
+run_test() {
+  local name=$1
+  local node=$2
+  local script=$3
+  echo "==== test: $1 (node: $2) ===="
+
+  local expected="$(mktemp)"
+  local got="$(mktemp)"
+  
+  if diff --strip-trailing-cr -u <(sh -c "$script") <(set -x; ./kubectl-node_shell $node -- sh -c "$script"); then
+    echo -e "Result: \e[42mPASS\e[49m"
+  else
+    echo -e "Result: \e[101mFAIL\e[49m"
+  fi
+}
+
+if [ -z $1 ]; then
+  echo "please specify node in first argument" >&2
+  exit -1
+fi
+
+case1=$(cat <<\EOT
+echo $(echo "
+hello everybody
+I'm a \"baby seal\""
+
+)
+EOT
+)
+
+case2=$(cat <<\EOT
+
+echo "ggg
+
+
+ttt"
+EOT
+)
+
+case3=$(cat <<\EOT
+echo $(echo "
+hello everybody
+I'm a \"baby seal
+
+really really
+
+\""
+)
+EOT
+)
+
+run_test "case 1" "$1" "$case1"
+run_test "case 2" "$1" "$case2"
+run_test "case 3" "$1" "$case3"