add test for sanitize func

Signed-off-by: aog <theaog@users.noreply.github.com>

tools/cg/main_test.go

@@ -0,0 +1,25 @@
+package main
+
+import (
+	"os"
+	"testing"
+)
+
+func TestSanitize(t *testing.T) {
+	from := "/dev/urandom"
+	file, err := os.Open(from)
+	if err != nil {
+		t.Fatalf("unable to open file %v", err)
+	}
+	defer file.Close()
+
+	data := make([]byte, 4096)
+	n, err := file.Read(data)
+	if err != nil {
+		t.Fatalf("unable to read bytes: %v", err)
+	}
+
+	t.Logf("read %v bytes from %v", n, from)
+	r1 := sanitize(string(data))
+	t.Logf("result1: %v", r1)
+}