Add infection and tests

composer.json

@@ -32,7 +32,8 @@
         "amphp/phpunit-util": "^1",
         "phpunit/phpunit": "^6",
         "friendsofphp/php-cs-fixer": "^2.3",
-        "amphp/php-cs-fixer-config": "dev-master"
+        "amphp/php-cs-fixer-config": "dev-master",
+        "infection/infection": "^0.9.3"
     },
     "autoload": {
         "psr-4": {

infection.json.dist

@@ -0,0 +1,11 @@
+{
+    "timeout": 5,
+    "source": {
+        "directories": [
+            "lib"
+        ]
+    },
+    "logs": {
+        "text": "infection.log"
+    }
+}

test/MessageTest.php

@@ -255,4 +255,27 @@ public function testPendingReadError()
             $stream->read();
         });
     }
+
+    public function testFalsyValueInStreamWhenBuffering()
+    {
+        Loop::run(function () {
+            $emitter = new Emitter;
+            $emitter->emit("0");
+            $emitter->complete();
+            $message = new Message(new IteratorStream($emitter->iterate()));
+
+            $this->assertSame("0", yield $message);
+        });
+    }
+
+    public function testFalsyValueInStreamWhenStreaming()
+    {
+        Loop::run(function () {
+            $emitter = new Emitter;
+            $emitter->emit("0");
+            $message = new Message(new IteratorStream($emitter->iterate()));
+
+            $this->assertSame("0", yield $message->read());
+        });
+    }
 }

test/PendingReadErrorTest.php

@@ -0,0 +1,16 @@
+<?php
+
+
+namespace Amp\ByteStream\Test;
+
+use Amp\ByteStream\PendingReadError;
+use Amp\PHPUnit\TestCase;
+
+class PendingReadErrorTest extends TestCase
+{
+
+    public function testDefaultErrorCode()
+    {
+        $this->assertSame(0, (new PendingReadError)->getCode());
+    }
+}

test/PipeTest.php

@@ -0,0 +1,25 @@
+<?php
+
+
+namespace Amp\ByteStream\Test;
+
+use Amp\ByteStream\IteratorStream;
+use Amp\ByteStream\OutputBuffer;
+use Amp\Iterator;
+use Amp\PHPUnit\TestCase;
+use function Amp\ByteStream\pipe;
+use function Amp\Promise\wait;
+
+class PipeTest extends TestCase
+{
+    public function testPipe()
+    {
+        $stream = new IteratorStream(Iterator\fromIterable(["abc", "def"]));
+        $buffer = new OutputBuffer;
+
+        $this->assertSame(6, wait(pipe($stream, $buffer)));
+
+        $buffer->end();
+        $this->assertSame("abcdef", wait($buffer));
+    }
+}