added tests for must-revalidate

Author: dhoffend

tests/CacheProviderTest.php

@@ -16,6 +16,16 @@ public function testAllowCache()
         $this->assertEquals('private, max-age=43200', $cacheControl);
     }
 
+    public function testAllowCacheWithMustRevalidate()
+    {
+        $cacheProvider = new CacheProvider();
+        $res = $cacheProvider->allowCache(new Response(), 'private', 43200, true);
+
+        $cacheControl = $res->getHeaderLine('Cache-Control');
+
+        $this->assertEquals('private, max-age=43200, must-revalidate', $cacheControl);
+    }
+
     public function testDenyCache()
     {
         $cacheProvider = new CacheProvider();

tests/CacheTest.php

@@ -37,6 +37,21 @@ public function testCacheControlHeader()
         $this->assertEquals('public, max-age=86400', $cacheControl);
     }
 
+    public function testCacheControlHeaderWithMustRevalidate()
+    {
+        $cache = new Cache('private', 86400, true);
+        $req = $this->requestFactory();
+        $res = new Response();
+        $next = function (Request $req, Response $res) {
+            return $res;
+        };
+        $res = $cache($req, $res, $next);
+
+        $cacheControl = $res->getHeaderLine('Cache-Control');
+
+        $this->assertEquals('private, max-age=86400, must-revalidate', $cacheControl);
+    }
+
     public function testCacheControlHeaderDoesNotOverrideExistingHeader()
     {
         $cache = new Cache('public', 86400);