fix paper size and add tests for Paper class

Author: troosan

src/PhpWord/Style/Paper.php

@@ -17,6 +17,8 @@
 
 namespace PhpOffice\PhpWord\Style;
 
+use PhpOffice\PhpWord\Shared\Converter;
+
 /**
  * Paper size from ISO/IEC 29500-1:2012 pg. 1656-1657
  *
@@ -100,6 +102,7 @@ class Paper extends AbstractStyle
         'A3'        => array(297, 420, 'mm'),
         'A4'        => array(210, 297, 'mm'),
         'A5'        => array(148, 210, 'mm'),
+        'B5'        => array(176, 250, 'mm'),
         'Folio'     => array(8.5, 13, 'in'),
         'Legal'     => array(8.5, 14, 'in'),
         'Letter'    => array(8.5, 11, 'in'),
@@ -157,11 +160,14 @@ public function setSize($size)
         $this->size = $this->setEnumVal($size, array_keys($this->sizes), $this->size);
 
         list($width, $height, $unit) = $this->sizes[$this->size];
-        $multipliers = array('mm' => 56.5217, 'in' => 1440);
-        $multiplier = $multipliers[$unit];
 
-        $this->width = (int)round($width * $multiplier);
-        $this->height = (int)round($height * $multiplier);
+        if ($unit == 'mm') {
+            $this->width = Converter::cmToTwip($width / 10);
+            $this->height = Converter::cmToTwip($height / 10);
+        } else {
+            $this->width = Converter::inchToTwip($width);
+            $this->height = Converter::inchToTwip($height);
+        }
 
         return $this;
     }

tests/PhpWord/Style/PaperTest.php

@@ -0,0 +1,72 @@
+<?php
+/**
+ * This file is part of PHPWord - A pure PHP library for reading and writing
+ * word processing documents.
+ *
+ * PHPWord is free software distributed under the terms of the GNU Lesser
+ * General Public License version 3 as published by the Free Software Foundation.
+ *
+ * For the full copyright and license information, please read the LICENSE
+ * file that was distributed with this source code. For the full list of
+ * contributors, visit https://github.com/PHPOffice/PHPWord/contributors.
+ *
+ * @link        https://github.com/PHPOffice/PHPWord
+ * @copyright   2010-2016 PHPWord contributors
+ * @license     http://www.gnu.org/licenses/lgpl.txt LGPL version 3
+ */
+
+namespace PhpOffice\PhpWord\Style;
+
+use PhpOffice\PhpWord\PhpWord;
+use PhpOffice\PhpWord\TestHelperDOCX;
+
+/**
+ * Test class for PhpOffice\PhpWord\Style\Paper
+ *
+ * @runTestsInSeparateProcesses
+ */
+class PaperTest extends \PHPUnit_Framework_TestCase
+{
+    /**
+     * Tear down after each test
+     */
+    public function tearDown()
+    {
+        TestHelperDOCX::clear();
+    }
+
+    /**
+     * Test initiation for paper
+     */
+    public function testInitiation()
+    {
+        $object = new Paper();
+
+        $this->assertEquals('A4', $object->getSize());
+    }
+
+    /**
+     * Test paper size for B5 format
+     */
+    public function testB5Size()
+    {
+        $object = new Paper('B5');
+
+        $this->assertEquals('B5', $object->getSize());
+        $this->assertEquals(9977.9527559055, $object->getWidth(), '', 0.000000001);
+        $this->assertEquals(14173.228346457, $object->getHeight(), '', 0.000000001);
+    }
+
+    /**
+     * Test paper size for Folio format
+     */
+    public function testFolioSize()
+    {
+        $object = new Paper();
+        $object->setSize('Folio');
+
+        $this->assertEquals('Folio', $object->getSize());
+        $this->assertEquals(12240, $object->getWidth(), '', 0.1);
+        $this->assertEquals(18720, $object->getHeight(), '', 0.1);
+    }
+}