add single_file_tests

single_file_tests/reflect.go

@@ -0,0 +1,18 @@
+package main
+
+import (
+	"fmt"
+)
+
+func main() {
+	var x interface{} = "str"
+
+	switch t := x.(type) {
+	case string:
+		fmt.Println("String!")
+		s := x.(string)
+		fmt.Println("As string: " + s)
+	default:
+		fmt.Println("Other: ", t)
+	}
+}