Diff

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/spec/util_ip_spec.lua	Fri Sep 15 17:07:57 2017 -0400
@@ -0,0 +1,103 @@
+
+local ip = require "util.ip";
+
+local new_ip = ip.new_ip;
+local match = ip.match;
+local parse_cidr = ip.parse_cidr;
+local commonPrefixLength = ip.commonPrefixLength;
+
+describe("util.ip", function()
+	describe("#match()", function()
+		it("should work", function()
+			local _ = new_ip;
+			local ip = _"10.20.30.40";
+			assert.are.equal(match(ip, _"10.0.0.0", 8), true);
+			assert.are.equal(match(ip, _"10.0.0.0", 16), false);
+			assert.are.equal(match(ip, _"10.0.0.0", 24), false);
+			assert.are.equal(match(ip, _"10.0.0.0", 32), false);
+
+			assert.are.equal(match(ip, _"10.20.0.0", 8), true);
+			assert.are.equal(match(ip, _"10.20.0.0", 16), true);
+			assert.are.equal(match(ip, _"10.20.0.0", 24), false);
+			assert.are.equal(match(ip, _"10.20.0.0", 32), false);
+
+			assert.are.equal(match(ip, _"0.0.0.0", 32), false);
+			assert.are.equal(match(ip, _"0.0.0.0", 0), true);
+			assert.are.equal(match(ip, _"0.0.0.0"), false);
+
+			assert.are.equal(match(ip, _"10.0.0.0", 255), false, "excessive number of bits");
+			assert.are.equal(match(ip, _"10.0.0.0", -8), true, "negative number of bits");
+			assert.are.equal(match(ip, _"10.0.0.0", -32), true, "negative number of bits");
+			assert.are.equal(match(ip, _"10.0.0.0", 0), true, "zero bits");
+			assert.are.equal(match(ip, _"10.0.0.0"), false, "no specified number of bits (differing ip)");
+			assert.are.equal(match(ip, _"10.20.30.40"), true, "no specified number of bits (same ip)");
+
+			assert.are.equal(match(_"127.0.0.1", _"127.0.0.1"), true, "simple ip");
+
+			assert.are.equal(match(_"8.8.8.8", _"8.8.0.0", 16), true);
+			assert.are.equal(match(_"8.8.4.4", _"8.8.0.0", 16), true);
+		end);
+	end);
+
+	describe("#parse_cidr()", function()
+		it("should work", function()
+			assert.are.equal(new_ip"0.0.0.0", new_ip"0.0.0.0")
+
+			local function assert_cidr(cidr, ip, bits)
+				local parsed_ip, parsed_bits = parse_cidr(cidr);
+				assert.are.equal(new_ip(ip), parsed_ip, cidr.." parsed ip is "..ip);
+				assert.are.equal(bits, parsed_bits, cidr.." parsed bits is "..tostring(bits));
+			end
+			assert_cidr("0.0.0.0", "0.0.0.0", nil);
+			assert_cidr("127.0.0.1", "127.0.0.1", nil);
+			assert_cidr("127.0.0.1/0", "127.0.0.1", 0);
+			assert_cidr("127.0.0.1/8", "127.0.0.1", 8);
+			assert_cidr("127.0.0.1/32", "127.0.0.1", 32);
+			assert_cidr("127.0.0.1/256", "127.0.0.1", 256);
+			assert_cidr("::/48", "::", 48);
+		end);
+	end);
+
+	describe("#new_ip()", function()
+		it("should work", function()
+			local v4, v6 = "IPv4", "IPv6";
+			local function assert_proto(s, proto)
+				local ip = new_ip(s);
+				if proto then
+					assert.are.equal(ip and ip.proto, proto, "protocol is correct for "..("%q"):format(s));
+				else
+					assert.are.equal(ip, nil, "address is invalid");
+				end
+			end
+			assert_proto("127.0.0.1", v4);
+			assert_proto("::1", v6);
+			assert_proto("", nil);
+			assert_proto("abc", nil);
+			assert_proto("   ", nil);
+		end);
+	end);
+
+	describe("#commonPrefixLength()", function()
+		it("should work", function()
+			local function assert_cpl6(a, b, len, v4)
+				local ipa, ipb = new_ip(a), new_ip(b);
+				if v4 then len = len+96; end
+				assert.are.equal(commonPrefixLength(ipa, ipb), len, "common prefix length of "..a.." and "..b.." is "..len);
+				assert.are.equal(commonPrefixLength(ipb, ipa), len, "common prefix length of "..b.." and "..a.." is "..len);
+			end
+			local function assert_cpl4(a, b, len)
+				return assert_cpl6(a, b, len, "IPv4");
+			end
+			assert_cpl4("0.0.0.0", "0.0.0.0", 32);
+			assert_cpl4("255.255.255.255", "0.0.0.0", 0);
+			assert_cpl4("255.255.255.255", "255.255.0.0", 16);
+			assert_cpl4("255.255.255.255", "255.255.255.255", 32);
+			assert_cpl4("255.255.255.255", "255.255.255.255", 32);
+
+			assert_cpl6("::1", "::1", 128);
+			assert_cpl6("abcd::1", "abcd::1", 128);
+			assert_cpl6("abcd::abcd", "abcd::", 112);
+			assert_cpl6("abcd::abcd", "abcd::abcd:abcd", 96);
+		end);
+	end);
+end);