Add test to verify Scheme retrieval is correct

This adds the test and the CHANGELOG-entry for the changed method

CHANGELOG.md

@@ -22,7 +22,9 @@ All notable changes to this project will be documented in this file, in reverse
 
 ### Fixed
 
-- Nothing.
+- [#363](https://github.com/zendframework/zend-diactoros/issues/363) modifies detection of HTTPS schemas via the `$_SERVER['HTTPS']` value
+  such that an empty HTTPS-key will result in a scheme of `http` and not
+  `https`.
 
 ## 2.1.2 - 2019-04-29
 

test/functions/MarshalUriFromSapiTest.php

@@ -0,0 +1,72 @@
+<?php
+/**
+ * @see       https://github.com/zendframework/zend-diactoros for the canonical source repository
+ * @copyright Copyright (c) 2018 Zend Technologies USA Inc. (http://www.zend.com)
+ * @license   https://github.com/zendframework/zend-diactoros/blob/master/LICENSE.md New BSD License
+ */
+
+declare(strict_types = 1);
+
+namespace ZendTest\Diactoros\functions;
+
+use PHPUnit\Framework\TestCase;
+use function Zend\Diactoros\marshalUriFromSapi;
+
+class MarshalUriFromSapiTest extends TestCase
+{
+    /** @dataProvider returnsUrlWithCorrectHttpSchemeFromArraysProvider */
+    public function testReturnsUrlWithCorrectHttpSchemeFromArrays(string $httpsValue, string $expectedScheme) : void
+    {
+        $server = [
+            "HTTPS" => $httpsValue,
+            "SERVER_NAME"=> "localhost",
+            "SERVER_PORT"=>"80",
+            "SERVER_ADDR"=> "172.22.0.4",
+            "REMOTE_PORT"=> "36852",
+            "REMOTE_ADDR" =>  "172.22.0.1",
+            "SERVER_SOFTWARE" =>  "nginx/1.11.8",
+            "GATEWAY_INTERFACE" =>  "CGI/1.1",
+            "SERVER_PROTOCOL" =>  "HTTP/1.1",
+            "DOCUMENT_ROOT" => "/var/www/public",
+            "DOCUMENT_URI" => "/index.php",
+            "REQUEST_URI" =>  "/api/messagebox-schema",
+            "PATH_TRANSLATED" => "/var/www/public",
+            "PATH_INFO" => "",
+            "SCRIPT_NAME" => "/index.php",
+            "CONTENT_LENGTH" => "",
+            "CONTENT_TYPE" => "",
+            "REQUEST_METHOD" => "GET",
+            "QUERY_STRING" => "",
+            "SCRIPT_FILENAME" => "/var/www/public/index.php",
+            "FCGI_ROLE" => "RESPONDER",
+            "PHP_SELF" => "/index.php",
+        ];
+
+        $headers = [
+            "HTTP_COOKIE" => '',
+            "HTTP_ACCEPT_LANGUAGE" => "de-DE,de;q=0.9,en-US;q=0.8,en;q=0.7",
+            "HTTP_ACCEPT_ENCODING" => "gzip, deflate, br",
+            "HTTP_REFERER" => "http://localhost:8080/index.html",
+            "HTTP_USER_AGENT" => "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Ubuntu Chromium/67.0.3396.99 Chrome/67.0.3396.99 Safari/537.36",
+            "HTTP_ACCEPT" => "application/json,*/*",
+            "HTTP_CONNECTION" => "keep-alive",
+            "HTTP_HOST" => "localhost:8080",
+        ];
+
+        $url = marshalUriFromSapi($server, $headers);
+
+        self::assertSame($expectedScheme, $url->getScheme());
+    }
+
+    public function returnsUrlWithCorrectHttpSchemeFromArraysProvider() : array
+    {
+        return [
+            'on-lowercase' => ['on', 'https'],
+            'on-uppercase' => ['ON', 'https'],
+            'off-lowercase' => ['off', 'http'],
+            'off-mixed-case' => ['oFf', 'http'],
+            'neither-on-nor-off' => ['foo', 'http'],
+            'empty' => ['', 'http'],
+        ];
+    }
+}