First external release

tests/Spout/Writer/Helper/XLSX/CellHelperTest.php

@@ -0,0 +1,37 @@
+<?php
+
+namespace Box\Spout\Writer\Helper\XLSX;
+
+/**
+ * Class CellHelperTest
+ *
+ * @package Box\Spout\Writer\Helper\XLSX
+ */
+class CellHelperTest extends \PHPUnit_Framework_TestCase
+{
+    /**
+     * @return array
+     */
+    public function dataProviderForTestGetCellIndexFromColumnIndex()
+    {
+        return [
+            [0, 'A'],
+            [1, 'B'],
+            [25, 'Z'],
+            [26, 'AA'],
+            [28, 'AC'],
+        ];
+    }
+
+    /**
+     * @dataProvider dataProviderForTestGetCellIndexFromColumnIndex
+     *
+     * @param int $columnIndex
+     * @param string $expectedCellIndex
+     * @return void
+     */
+    public function testGetCellIndexFromColumnIndex($columnIndex, $expectedCellIndex)
+    {
+        $this->assertEquals($expectedCellIndex, CellHelper::getCellIndexFromColumnIndex($columnIndex));
+    }
+}