diff --git a/tests/int2alpha_test.aer b/tests/int2alpha_test.aer
new file mode 100644
index 0000000..7f4a467
--- /dev/null
+++ b/tests/int2alpha_test.aer
@@ -0,0 +1,26 @@
+class Program {
+
+	string num2alpha(int $n) {
+		string $r = '';
+		for(int $i = 1; $n >= 0 && $i < 10; $i++) {
+			$r = chr(0x41 + ($n % pow(26, $i) / pow(26, $i - 1))) + $r;
+			$n -= pow(26, $i);
+		}
+		return $r;
+	}
+
+	int alpha2num(string $a) {
+		int $r = 0;
+		int $l = strlen($a);
+		for(int $i = 0; $i < $l; $i++) {
+			$r += pow(26, $i) * (ord($a[$l - $i - 1]) - 0x40);
+		}
+		return (int) $r - 1;
+	}
+
+	void main() {
+		import('math');
+		var_dump($this->alpha2num("Salut"), $this->num2alpha(1723), $this->num2alpha(9854), $this->alpha2num("Base64"));
+	}
+
+}
diff --git a/tests/int2alpha_test.exp b/tests/int2alpha_test.exp
new file mode 100644
index 0000000..882e706
--- /dev/null
+++ b/tests/int2alpha_test.exp
@@ -0,0 +1,4 @@
+int(9293725)
+string(3 'BNH')
+string(3 'NOA')
+int(39764075)