Add tests (#71)

test/RecordTest.php

@@ -0,0 +1,23 @@
+<?php
+
+namespace Amp\Dns\Test;
+
+use Amp\Dns\Record;
+use Amp\PHPUnit\TestCase;
+
+class RecordTest extends TestCase {
+    public function testGetName() {
+        $this->assertSame("A", Record::getName(Record::A));
+    }
+
+    public function testGetNameOnInvalidRecordType() {
+        $this->expectException(\Error::class);
+        $this->expectExceptionMessage("65536 does not correspond to a valid record type (must be between 0 and 65535).");
+
+        Record::getName(65536);
+    }
+
+    public function testGetNameOnUnknownRecordType() {
+        $this->assertSame("unknown (1000)", Record::getName(1000));
+    }
+}

test/SocketTest.php

@@ -28,4 +28,16 @@ abstract class SocketTest extends TestCase {
             $this->assertSame(MessageTypes::RESPONSE, $result->getType());
         });
     }
+
+    public function testGetLastActivity() {
+        Loop::run(function () {
+            $question = (new QuestionFactory)->create(Dns\Record::A);
+            $question->setName("google.com");
+
+            /** @var Dns\Internal\Socket $socket */
+            $socket = yield $this->connect();
+
+            $this->assertTrue($socket->getLastActivity() < time() + 1);
+        });
+    }
 }