update test

5-ShellP3/bats/student_tests.sh

@@ -11,4 +11,23 @@ EOF
 
     # Assertions
     [ "$status" -eq 0 ]
-}
+}
\ No newline at end of file
+
+@test "Piped commands: echo, tr, and rev" {
+    run "./dsh" <<EOF
+echo "hello world" | tr '[:lower:]' '[:upper:]' | rev
+EOF
+
+    stripped_output=$(echo "$output" | tr -d '[:space:]')
+    expected_output="DLROWOLLEHdsh3>dsh3>cmdloopreturned0"
+
+    echo "Captured stdout:" 
+    echo "Output: $output"
+    echo "Exit Status: $status"
+    echo "${stripped_output} -> ${expected_output}"
+
+    [ "$stripped_output" = "$expected_output" ]
+    [ "$status" -eq 0 ]
+}
+
+