test: migrate IpParserUtilTest to kotest

Author: oldratlee

library/src/test/java/com/alibaba/dcm/internal/IpParserUtilTest.java

@@ -0,0 +1,57 @@
+package com.alibaba.dcm.internal
+
+import io.kotest.assertions.throwables.shouldThrow
+import io.kotest.core.spec.style.FunSpec
+import io.kotest.matchers.collections.shouldHaveSize
+import io.kotest.matchers.shouldBe
+import java.net.InetAddress
+
+/**
+ * @author Jerry Lee (oldratlee at gmail dot com)
+ */
+class IpParserUtilTests : FunSpec({
+
+    test("ipv4 to ByteArray") {
+        IpParserUtil.ip2ByteArray("192.168.0.13") shouldBe byteArrayOf(192.toByte(), 168.toByte(), 0.toByte(), 13)
+        IpParserUtil.ip2ByteArray("10.192.255.0") shouldBe byteArrayOf(10, 192.toByte(), 255.toByte(), 0)
+
+        val ip = "10.1.1.1"
+        val actualIpBytes = IpParserUtil.ip2ByteArray(ip)
+
+        actualIpBytes shouldBe byteArrayOf(10, 1, 1, 1)
+        actualIpBytes shouldBe getIpByGetAllByName(ip)
+    }
+
+    test("ipv6 to ByteArray") {
+        val ip = "2404:6800:4005:80a:0:0:0:200e"
+        val bytes = IpParserUtil.ip2ByteArray(ip)
+
+        bytes shouldBe getIpByGetAllByName(ip)
+    }
+
+    mapOf(
+            "a.1.1.1" to "ip to ByteArray: ipv4 with char exception",
+            "-2.168.0.13" to "ip to ByteArray: ipv4 minus exception",
+            "1.1.1.256" to "ip to ByteArray: ipv4 overflow exception",
+            "192.168.0.13.1" to "ip to ByteArray: ipv4 too long exception",
+            "2404:6800:4005:80a:0:0:0:200z" to "ip to ByteArray: ipv6 with char exception",
+            "-2404:6800:4005:80a:0:0:0:200e" to "ip to ByteArray: ipv6 minus exception",
+            "2404:6800:4005:80a:0:0:0:200:123" to "ip to ByteArray: ipv6 too long exception",
+    ).forEach { (ip, caseName) ->
+
+        test("test $caseName") {
+            shouldThrow<IllegalArgumentException> {
+                IpParserUtil.ip2ByteArray(ip)
+            }.message shouldBe ip + INVALID_IP_ADDRESS
+        }
+
+    }
+})
+
+private fun getIpByGetAllByName(ip: String): ByteArray {
+    val addresses = InetAddress.getAllByName(ip)
+    addresses.shouldHaveSize(1)
+    return addresses[0].address
+}
+
+private const val INVALID_IP_ADDRESS = ": invalid IP address"