Add precision to progress bar

src/TerminalObject/Dynamic/Progress.php

@@ -27,6 +27,13 @@ class Progress extends DynamicTerminalObject
      */
     protected $current_percentage = '';
 
+    /**
+     * The number of decimal points to display
+     *
+     * @var integer $precision
+     */
+    protected $precision = 0;
+
     /**
      * The string length of the bar when at 100%
      *
@@ -88,6 +95,20 @@ public function total($total)
         return $this;
     }
 
+    /**
+     * Set the completed percentage precision
+     *
+     * @param integer $precision The number of decimal places to display
+     *
+     * @return Progress
+     */
+    public function precision($precision)
+    {
+        $this->precision = $precision;
+
+        return $this;
+    }
+
     /**
      * Determines the current percentage we are at and re-writes the progress bar
      *
@@ -281,12 +302,14 @@ protected function getBarStrLen()
     /**
      * Format the percentage so it looks pretty
      *
-     * @param integer $percentage
+     * @param integer $percentage The percentage (0-1) to format
+     *
      * @return float
      */
     protected function percentageFormatted($percentage)
     {
-        return round($percentage * 100) . '%';
+        $factor = pow(10, $this->precision);
+        return round($percentage * 100 * $factor) / $factor . '%';
     }
 
     /**

tests/ProgressTest.php

@@ -84,6 +84,32 @@ public function it_can_output_a_progress_bar_via_constructor()
         }
     }
 
+    /**
+     * @test
+     * @doesNotPerformAssertions
+     */
+    public function it_can_output_a_progress_bar_with_precision()
+    {
+        $this->shouldWrite('');
+        $this->shouldWrite("\e[m\e[1A\r\e[K{$this->repeat(0)} 0.008%\e[0m");
+        $progress = $this->cli->progress(100000);
+        $progress->precision(3);
+        $progress->current(8);
+    }
+
+    /**
+     * @test
+     * @doesNotPerformAssertions
+     */
+    public function it_can_output_a_progress_bar_with_precision_rounded()
+    {
+        $this->shouldWrite('');
+        $this->shouldWrite("\e[m\e[1A\r\e[K{$this->repeat(0)} 0.01%\e[0m");
+        $progress = $this->cli->progress(100000);
+        $progress->precision(2);
+        $progress->current(8);
+    }
+
     /**
      * @test
      * @doesNotPerformAssertions