Replace echo to flushable stdout - fix #19

Added outPath and forceFlush arguments

FYI:
This is useful, when a custom phpunit printer explicit flushes its results.

Author: andras-tim

README.md

@@ -34,8 +34,10 @@ Now run your test suite as normal. If tests run that exceed the slowness thresho
 
 ## Configuration
 
-SpeedTrap has two configurable parameters:
+SpeedTrap has some configurable parameters:
 
+* **outPath** - File path of the report output (Default: php://stdout)
+* **forceFlush** - Boolean flag for flushing after every written lines (Default: false)
 * **slowThreshold** - Number of milliseconds a test takes to execute before being considered "slow" (Default: 500ms)
 * **reportLength** - Number of slow tests included in the report (Default: 10 tests)
 
@@ -49,6 +51,12 @@ These configuration parameters are set in `phpunit.xml` when adding the listener
         <listener class="JohnKary\PHPUnit\Listener\SpeedTrapListener">
             <arguments>
                 <array>
+                    <element key="outPath">
+                        <string>php://stderr</string>
+                    </element>
+                    <element key="forceFlush">
+                        <boolean>true</boolean>
+                    </element>
                     <element key="slowThreshold">
                         <integer>500</integer>
                     </element>

phpunit.xml.example

@@ -26,6 +26,12 @@
         <listener class="JohnKary\PHPUnit\Listener\SpeedTrapListener">
             <arguments>
                 <array>
+                    <element key="outPath">
+                        <string>php://stderr</string>
+                    </element>
+                    <element key="forceFlush">
+                        <boolean>true</boolean>
+                    </element>
                     <element key="slowThreshold">
                         <integer>500</integer>
                     </element>

src/JohnKary/PHPUnit/Listener/SpeedTrapListener.php

@@ -4,7 +4,7 @@
 
 /**
  * A PHPUnit TestListener that exposes your slowest running tests by outputting
- * results directly to the console.
+ * results directly to the console or output file.
  */
 class SpeedTrapListener implements \PHPUnit_Framework_TestListener
 {
@@ -18,6 +18,27 @@ class SpeedTrapListener implements \PHPUnit_Framework_TestListener
      */
     protected $suites = 0;
 
+    /**
+     * Output path
+     *
+     * @var string
+     */
+    protected $outPath;
+
+    /**
+     * Output descriptor
+     *
+     * @var resource
+     */
+    protected $out;
+
+    /**
+     * If True, flush output after every write.
+     *
+     * @var boolean
+     */
+    protected $forceFlush;
+
     /**
      * Time in milliseconds at which a test will be considered "slow" and be
      * reported by this listener.
@@ -48,6 +69,16 @@ class SpeedTrapListener implements \PHPUnit_Framework_TestListener
     public function __construct(array $options = array())
     {
         $this->loadOptions($options);
+
+        $this->out = fopen($this->outPath, 'wt');
+    }
+
+    /**
+     * Destruct the instance
+     */
+    public function __destruct()
+    {
+        fclose($this->out);
     }
 
     /**
@@ -266,7 +297,7 @@ protected function getHiddenCount()
      */
     protected function renderHeader()
     {
-        echo sprintf("\n\nYou should really fix these slow tests (>%sms)...\n", $this->slowThreshold);
+        $this->write(sprintf("\n\nYou should really fix these slow tests (>%sms)...\n", $this->slowThreshold));
     }
 
     /**
@@ -281,7 +312,7 @@ protected function renderBody()
             $label = key($slowTests);
             $time = array_shift($slowTests);
 
-            echo sprintf(" %s. %sms to run %s\n", $i, $time, $label);
+            $this->write(sprintf(" %s. %sms to run %s\n", $i, $time, $label));
         }
     }
 
@@ -291,7 +322,8 @@ protected function renderBody()
     protected function renderFooter()
     {
         if ($hidden = $this->getHiddenCount()) {
-            echo sprintf("...and there %s %s more above your threshold hidden from view", $hidden == 1 ? 'is' : 'are', $hidden);
+            $this->write(sprintf("...and there %s %s more above your threshold hidden from view",
+                                 $hidden == 1 ? 'is' : 'are', $hidden));
         }
     }
 
@@ -302,6 +334,8 @@ protected function renderFooter()
      */
     protected function loadOptions(array $options)
     {
+        $this->outPath = isset($options['outPath']) ? $options['outPath'] : 'php://stdout';
+        $this->forceFlush = isset($options['forceFlush']) ? $options['forceFlush'] : false;
         $this->slowThreshold = isset($options['slowThreshold']) ? $options['slowThreshold'] : 500;
         $this->reportLength = isset($options['reportLength']) ? $options['reportLength'] : 10;
     }
@@ -328,4 +362,17 @@ protected function getSlowThreshold(\PHPUnit_Framework_TestCase $test)
 
         return isset($ann['method']['slowThreshold'][0]) ? $ann['method']['slowThreshold'][0] : $this->slowThreshold;
     }
+
+    /**
+     * Write text to output
+     *
+     * @param string $buffer
+     */
+    protected function write($buffer)
+    {
+        fwrite($this->out, $buffer);
+
+        if ($this->forceFlush)
+            fflush($this->out);
+    }
 }