Add tests for byte to int conversions

Author: zeroSteiner

spec/lib/rex/crypto_spec.rb

@@ -0,0 +1,33 @@
+# -*- coding:binary -*-
+require 'spec_helper'
+
+RSpec.describe Rex::Crypto do
+  describe '.bytes_to_int' do
+    it 'converts an empty byte correctly' do
+      expect(subject.bytes_to_int("".b)).to eq(0)
+    end
+
+    it 'converts a single null byte correctly' do
+      expect(subject.bytes_to_int("\x00".b)).to eq(0)
+    end
+
+    it 'converts a single non-null byte correctly' do
+      expect(subject.bytes_to_int("\x01".b)).to eq(1)
+    end
+
+    it 'converts multiple bytes correctly' do
+      expect(subject.bytes_to_int("\x01\x02\x03\x04".b)).to eq(16909060)
+    end
+  end
+
+  describe '.int_to_bytes' do
+    it 'converts 0 to an empty byte' do
+      expect(subject.int_to_bytes(0)).to eq("".b)
+    end
+
+    it 'converts to bytes correctly' do
+      expect(subject.int_to_bytes(1)).to eq("\x01".b)
+      expect(subject.int_to_bytes(16909060)).to eq("\x01\x02\x03\x04".b)
+    end
+  end
+end