Add unit test for transition model

app/Model/TransitionExport.php

@@ -0,0 +1,76 @@
+<?php
+
+namespace Kanboard\Model;
+
+use Kanboard\Core\DateParser;
+
+/**
+ * Transition Export
+ *
+ * @package  model
+ * @author   Frederic Guillot
+ */
+class TransitionExport extends Base
+{
+    /**
+     * Get project export
+     *
+     * @access public
+     * @param  integer    $project_id      Project id
+     * @param  mixed      $from            Start date (timestamp or user formatted date)
+     * @param  mixed      $to              End date (timestamp or user formatted date)
+     * @return array
+     */
+    public function export($project_id, $from, $to)
+    {
+        $results = array($this->getColumns());
+        $transitions = $this->transition->getAllByProjectAndDate($project_id, $from, $to);
+
+        foreach ($transitions as $transition) {
+            $results[] = $this->format($transition);
+        }
+
+        return $results;
+    }
+
+    /**
+     * Get column titles
+     *
+     * @access protected
+     * @return string[]
+     */
+    protected function getColumns()
+    {
+        return array(
+            e('Id'),
+            e('Task Title'),
+            e('Source column'),
+            e('Destination column'),
+            e('Executer'),
+            e('Date'),
+            e('Time spent'),
+        );
+    }
+
+    /**
+     * Format the output of a transition array
+     *
+     * @access protected
+     * @param  array     $transition
+     * @return array
+     */
+    protected function format(array $transition)
+    {
+        $values = array(
+            (int) $transition['id'],
+            $transition['title'],
+            $transition['src_column'],
+            $transition['dst_column'],
+            $transition['name'] ?: $transition['username'],
+            date($this->config->get('application_datetime_format', DateParser::DATE_TIME_FORMAT), $transition['date']),
+            round($transition['time_spent'] / 3600, 2)
+        );
+
+        return $values;
+    }
+}