IHF: to_default_timezone tests added.

Author: dmitry-ivanov

src/date.php

@@ -1,6 +1,7 @@
 <?php
 
 use Carbon\Carbon;
+use Illuminate\Support\Facades\Config;
 
 if (!function_exists('to_default_timezone')) {
     function to_default_timezone($datetime)
@@ -9,6 +10,8 @@ function to_default_timezone($datetime)
             return $datetime;
         }
 
-        return Carbon::parse($datetime)->timezone(config('app.timezone'))->toDateTimeString();
+        $timezone = Config::get('app.timezone');
+
+        return Carbon::parse($datetime)->timezone($timezone)->toDateTimeString();
     }
 }

tests/date/ToDefaultTimezoneTest.php

@@ -0,0 +1,22 @@
+<?php
+
+use Illuminate\Support\Facades\Config;
+
+class ToDefaultTimezoneTest extends TestCase
+{
+    /** @test */
+    public function it_returns_the_value_itself_for_the_empty_values()
+    {
+        $this->assertNull(to_default_timezone(null));
+        $this->assertFalse(to_default_timezone(false));
+        $this->assertEquals('', to_default_timezone(''));
+    }
+
+    /** @test */
+    public function it_converts_valid_datetime_strings_to_default_timezone()
+    {
+        Config::shouldReceive('get')->with('app.timezone')->once()->andReturn('Europe/Kiev');
+
+        $this->assertEquals('2017-02-28 16:05:01', to_default_timezone('2017-02-28T14:05:01Z'));
+    }
+}