From 717dabc8832370ccc526d32552c765bece726aff Mon Sep 17 00:00:00 2001
From: Niklas Keller <me@kelunik.com>
Date: Thu, 12 Jul 2018 08:28:31 +0200
Subject: [PATCH] Fix tests

---
 composer.json              | 2 +-
 lib/ProcessInputStream.php | 8 +++++++-
 test/ProcessTest.php       | 1 +
 3 files changed, 9 insertions(+), 2 deletions(-)

diff --git a/composer.json b/composer.json
index cdbe601..38970f0 100644
--- a/composer.json
+++ b/composer.json
@@ -3,7 +3,7 @@
     "homepage": "https://github.com/amphp/process",
     "description": "Asynchronous process manager.",
     "require": {
-        "php": ">=7",
+        "php": ">=7.2",
         "amphp/amp": "dev-ext-task",
         "amphp/byte-stream": "dev-ext-task"
     },
diff --git a/lib/ProcessInputStream.php b/lib/ProcessInputStream.php
index 1dce6d1..72f10d5 100644
--- a/lib/ProcessInputStream.php
+++ b/lib/ProcessInputStream.php
@@ -53,6 +53,9 @@ class ProcessInputStream implements InputStream
             if ($this->shouldClose) {
                 if ($this->resourceStream->getResource()) {
                     $this->buffer .= \stream_get_contents($this->resourceStream->getResource());
+                    if ($this->buffer === "") {
+                        $this->buffer = null;
+                    }
                 }
 
                 $this->resourceStream->close();
@@ -125,8 +128,11 @@ class ProcessInputStream implements InputStream
     {
         $this->shouldClose = true;
 
-        if ($this->resourceStream->getResource()) {
+        if ($this->resourceStream && $this->resourceStream->getResource()) {
             $this->buffer .= \stream_get_contents($this->resourceStream->getResource());
+            if ($this->buffer === "") {
+                $this->buffer = null;
+            }
         }
 
         if ($this->initialRead) {
diff --git a/test/ProcessTest.php b/test/ProcessTest.php
index 1ad4dbf..7297d43 100644
--- a/test/ProcessTest.php
+++ b/test/ProcessTest.php
@@ -44,6 +44,7 @@ class ProcessTest extends TestCase
         /** @noinspection PhpUnhandledExceptionInspection */
         $process->start();
 
+        $process->getStdout()->read();
         $code = $process->join();
 
         $this->assertSame(42, $code);