Merge branch 'master' into event_warning

_test/tests/inc/cache_use.test.php

+<?php
+
+/**
+ * Class cache_use_test
+ *
+ * Tests if caching can actually be used
+ */
+class cache_use_test extends DokuWikiTest {
+    /** @var cache_renderer $cache */
+    private $cache;
+
+    function setUp() {
+        global $ID;
+        parent::setUp();
+
+        $ID = 'cached';
+        $file = wikiFN($ID);
+
+        saveWikiText($ID, 'Content', 'Created');
+        // set the modification time a second in the past in order to ensure that the cache is newer than the page
+        touch($file, time()-1);
+
+        # Create cache. Note that the metadata cache is used as the xhtml cache triggers metadata rendering
+        $this->cache = new cache_renderer($ID, $file, 'metadata');
+        $this->cache->storeCache('Test');
+    }
+
+    function test_use() {
+        $this->assertTrue($this->cache->useCache());
+    }
+
+
+    function test_purge() {
+        $this->assertFalse($this->cache->useCache(array('purge' => true)));
+    }
+}
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