From 78b5f7eb19b8bf14df5d524a7d7ce9cad8c4b583 Mon Sep 17 00:00:00 2001
From: widmogrod <widmogrod@gmail.com>
Date: Wed, 20 Dec 2017 21:58:46 +0100
Subject: [PATCH] Functional\tail test

---
 test/Functional/TailTest.php | 43 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 43 insertions(+)
 create mode 100644 test/Functional/TailTest.php

diff --git a/test/Functional/TailTest.php b/test/Functional/TailTest.php
new file mode 100644
index 0000000..da9b368
--- /dev/null
+++ b/test/Functional/TailTest.php
@@ -0,0 +1,43 @@
+<?php
+
+namespace test\Functional;
+
+use Widmogrod\Primitive\Listt;
+use function Widmogrod\Functional\fromIterable;
+use function Widmogrod\Functional\tail;
+
+class TailTest extends \PHPUnit_Framework_TestCase
+{
+    /**
+     * @dataProvider provideData
+     */
+    public function test_it_should_return_boxed_value(
+        Listt $listt,
+        Listt $expected
+    ) {
+        $this->assertTrue(tail($listt)->equals($expected));
+    }
+
+    public function provideData()
+    {
+        return [
+            'Should return tail from finite array' => [
+                '$listt' => fromIterable([1, 2, 3]),
+                '$expected' => fromIterable([2, 3]),
+            ],
+            'Should return tail from finite iterator' => [
+                '$listt' => fromIterable(new \ArrayIterator([1, 2, 3])),
+                '$expected' => fromIterable([2, 3]),
+            ],
+        ];
+    }
+
+    /**
+     * @expectedException \Widmogrod\Primitive\EmptyListError
+     * @expectedExceptionMessage Cannot call tail() on empty list
+     */
+    public function test_it_should_throw_exception_when_list_is_empty()
+    {
+        tail(Listt::mempty());
+    }
+}
-- 
2.11.0