Initial draft for porting this project to Gradle + Kotlin

This is one of my stupidest idea ever.

mobile/src/test/java/com/github/shadowsocks/ExampleUnitTest.kt

@@ -0,0 +1,17 @@
+package com.github.shadowsocks
+
+import org.junit.Test
+
+import org.junit.Assert.*
+
+/**
+ * Example local unit test, which will execute on the development machine (host).
+ *
+ * @see [Testing documentation](http://d.android.com/tools/testing)
+ */
+class ExampleUnitTest {
+    @Test
+    fun addition_isCorrect() {
+        assertEquals(4, (2 + 2).toLong())
+    }
+}

mobile/src/test/java/com/github/shadowsocks/utils/SubnetTest.kt

@@ -0,0 +1,32 @@
+package com.github.shadowsocks.utils
+
+import com.github.shadowsocks.utils.Subnet
+import org.junit.Assert
+import org.junit.Test
+import java.net.InetAddress
+
+object SubnetTest {
+    @Test
+    fun parsingAndEquals() {
+        Assert.assertEquals(Subnet(InetAddress.getByName("1.10.11.12"), 25), Subnet.fromString("1.10.11.12/25"))
+        Assert.assertEquals(Subnet(InetAddress.getByName("12.118.130.86"), 32), Subnet.fromString("12.118.130.86"))
+        Assert.assertEquals(Subnet(InetAddress.getByName("caec:cec6:c4ef:bb7b:1a78:d055:216d:3a78"), 96),
+                Subnet.fromString("caec:cec6:c4ef:bb7b:1a78:d055:216d:3a78/96"))
+        Assert.assertEquals(Subnet(InetAddress.getByName("be37:44bd:8630:7a0:2a3d:ff95:dd33:42f0"), 128),
+                Subnet.fromString("be37:44bd:8630:7a0:2a3d:ff95:dd33:42f0"))
+        Assert.assertNotEquals(Subnet.fromString("1.2.3.4/12"), Subnet.fromString("1.2.3.5/12"))
+    }
+
+    @Test(expected = IllegalArgumentException::class)
+    fun invalidParsing1() {
+        Subnet.fromString("caec:cec6:c4ef:bb7b:1a78:d055:216d:3a78/129")
+    }
+    @Test(expected = IllegalArgumentException::class)
+    fun invalidParsing2() {
+        Subnet.fromString("caec:cec6:c4ef:bb7b:1a78:d055:216d:3a78/-99")
+    }
+    @Test(expected = IllegalArgumentException::class)
+    fun invalidParsing3() {
+        Subnet.fromString("caec:cec6:c4ef:bb7b:1a78:d055:216d:3a78/1/0")
+    }
+}