diff --git a/internal/processor/script-js_test.go b/internal/processor/script-js_test.go
new file mode 100644
index 0000000..8c274a0
--- /dev/null
+++ b/internal/processor/script-js_test.go
@@ -0,0 +1,48 @@
+package processor_test
+
+import (
+	"testing"
+
+	"github.com/jwetzell/showbridge-go/internal/processor"
+)
+
+func TestGoodScriptJS(t *testing.T) {
+	tests := []struct {
+		processor processor.Processor
+		name      string
+		payload   any
+		expected  any
+	}{
+		{
+			processor: &processor.ScriptJS{Program: `
+			payload = payload + 1
+			`},
+			name:     "number",
+			payload:  1,
+			expected: 2,
+		},
+		{
+			processor: &processor.ScriptJS{Program: `
+			payload = payload + "1"
+			`},
+			name:     "string",
+			payload:  "1",
+			expected: "11",
+		},
+	}
+
+	for _, test := range tests {
+		t.Run(test.name, func(t *testing.T) {
+			got, err := test.processor.Process(t.Context(), test.payload)
+
+			if err != nil {
+				t.Errorf("script.js failed: %s", err)
+			}
+
+			//TODO(jwetzell): work out better way to compare the any/any
+			if got != test.expected {
+				t.Errorf("script.js got %+v, expected %+v", got, test.expected)
+			}
+		})
+	}
+}