Add tests for AwsRunner class

Author: thekid

src/test/php/com/amazon/aws/lambda/unittest/AwsRunnerTest.class.php

@@ -0,0 +1,52 @@
+<?php namespace com\amazon\aws\lambda\unittest;
+
+use com\amazon\aws\lambda\Handler;
+use io\streams\{StringWriter, MemoryOutputStream};
+use lang\{ClassLoader, IllegalArgumentException, ClassNotFoundException};
+use test\{Assert, Before, Expect, Test};
+use xp\lambda\AwsRunner;
+
+class AwsRunnerTest {
+  private $impl;
+
+  #[Before]
+  public function impl() {
+    $this->impl= ClassLoader::defineClass('AwsRunnerTest_Handler', Handler::class, [], [
+      'target' => function() {
+        return function($event, $context) { /* NOOP */ };
+      }
+    ]);
+    $this->writer= new StringWriter(new MemoryOutputStream());
+  }
+
+  #[Test]
+  public function handler_determined_from_environment() {
+    $handler= AwsRunner::handler(['_HANDLER' => $this->impl->getName()], $this->writer);
+    Assert::instance($this->impl, $handler);
+  }
+
+  #[Test, Expect(class: IllegalArgumentException::class, message: 'Class util.Date is not a lambda handler')]
+  public function handler_must_extend_base_class() {
+    AwsRunner::handler(['_HANDLER' => 'util.Date'], $this->writer);
+  }
+
+  #[Test, Expect(class: ClassNotFoundException::class, message: 'Class "" could not be found')]
+  public function without_handler() {
+    AwsRunner::handler([], $this->writer);
+  }
+
+  #[Test]
+  public function endpoint_url_determined_from_environment() {
+    $endpoint= AwsRunner::endpoint(['AWS_LAMBDA_RUNTIME_API' => 'localhost:9000'], 'invocation/next');
+    Assert::equals(
+      'http://localhost:9000/2018-06-01/runtime/invocation/next',
+      $endpoint->getUrl()->getCanonicalURL()
+    );
+  }
+
+  #[Test]
+  public function endpoint_timeout_is_15_minutes() {
+    $endpoint= AwsRunner::endpoint(['AWS_LAMBDA_RUNTIME_API' => 'localhost:9000'], 'invocation/next');
+    Assert::equals(15 * 60, $endpoint->getTimeout());
+  }
+}