Also test Lambda implementations

Author: thekid

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

@@ -1,16 +1,16 @@
 <?php namespace com\amazon\aws\lambda\unittest;
 
-use com\amazon\aws\lambda\Context;
+use com\amazon\aws\lambda\{Context, Lambda};
 use lang\IllegalStateException;
-use test\{Assert, Test};
+use test\{Assert, Test, Values};
 
 class BufferedTest extends RuntimeTest {
   use TestContext;
 
   /**
    * Invokes a lambda and returns the response
    * 
-   * @param  function(var, com.amazon.aws.lambda.Context, com.amazon.aws.lambda.Stream): void
+   * @param  function(var, com.amazon.aws.lambda.Context): void
    * @return string
    */
   private function invoke($lambda) {
@@ -21,16 +21,30 @@ private function invoke($lambda) {
     ;
   }
 
+  /**
+   * Lambda implementations for `response` test.
+   *
+   * @return iterable
+   */
+  private function implementations() {
+    yield [function($event, $context) {
+      return ['test' => true];
+    }];
+    yield [new class() implements Lambda {
+      public function process($event, $context) {
+        return ['test' => true];
+      }
+    }];
+  }
+
   #[Test]
   public function can_create() {
     $this->runtime->buffered();
   }
 
-  #[Test]
-  public function response() {
-    $response= $this->invoke(function($event, $context) {
-      return ['test' => true];
-    });
+  #[Test, Values(from: 'implementations')]
+  public function response($lambda) {
+    $response= $this->invoke($this->runtime->invokeable($lambda)->callable);
 
     Assert::equals(
       "POST /2018-06-01/runtime/invocation/3e1afeb0-cde4-1d0e-c3c0-66b15046bb88/response HTTP/1.1\r\n".

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

@@ -28,18 +28,18 @@ private function invoke($lambda) {
    * @return iterable
    */
   private function implementations() {
-    yield [$this->runtime->invokeable(function($event, $stream, $context) {
+    yield [function($event, $stream, $context) {
       $stream->use('text/event-stream');
       $stream->write("data: One\n\n");
       $stream->write("data: Two\n\n");
-    })];
-    yield [$this->runtime->invokeable(new class() implements Streaming {
+    }];
+    yield [new class() implements Streaming {
       public function handle($event, $stream, $context) {
         $stream->use('text/event-stream');
         $stream->write("data: One\n\n");
         $stream->write("data: Two\n\n");
       }
-    })];
+    }];
   }
 
   #[Test]
@@ -84,7 +84,7 @@ public function reports_exceptions_before_streaming_via_error() {
 
   #[Test, Values(from: 'implementations')]
   public function write_event_stream($lambda) {
-    $response= $this->invoke($lambda->callable);
+    $response= $this->invoke($this->runtime->invokeable($lambda)->callable);
 
     Assert::equals(
       "POST /2018-06-01/runtime/invocation/3e1afeb0-cde4-1d0e-c3c0-66b15046bb88/response HTTP/1.1\r\n".