Add UuidTest

app/src/test/java/li/dadada/uuidgen/model/UuidTest.kt

@@ -0,0 +1,28 @@
+package li.dadada.uuidgen.model
+
+import org.junit.Assert.assertFalse
+import org.junit.Assert.assertTrue
+import org.junit.Test
+
+class UuidTest {
+
+    @Test
+    fun `random UUID are not equal`() {
+        val u1 = Uuid()
+        val u2 = Uuid()
+        assertFalse(u1 == u2)
+    }
+
+    @Test
+    fun `UUIDs with same id are equal`() {
+        val u1 = Uuid()
+        val u2 = Uuid(uuid = u1.uuid)
+        assertTrue(u1 == u2)
+    }
+
+    @Test
+    fun `UUID is self identical`() {
+        val u1 = Uuid()
+        assertTrue(u1 == u1)
+    }
+}