Rename tests to match factory methods

Author: WyriHaximus

tests/SingleRecvObservableTest.php renamed to tests/ChannelTest.php

@@ -16,12 +16,12 @@
 /**
  * @internal
  */
-final class SingleRecvObservableTest extends AsyncTestCase
+final class ChannelTest extends AsyncTestCase
 {
     /**
      * @test
      */
-    public function recv(): void
+    public function channel(): void
     {
         $d = bin2hex(random_bytes(13));
 

tests/SingleRecvTest.php renamed to tests/SingleTest.php

@@ -19,12 +19,12 @@
 /**
  * @internal
  */
-final class SingleRecvTest extends AsyncTestCase
+final class SingleTest extends AsyncTestCase
 {
     /**
      * @test
      */
-    public function recv(): void
+    public function single(): void
     {
         $d = bin2hex(random_bytes(13));