[WPE][GTK] Cleanup disk cache at the beginning of `WebKitWebsiteData/…

…cache` API test

https://bugs.webkit.org/show_bug.cgi?id=260524

Reviewed by Michael Catanzaro.

If the test fails somewhere in the middle for some reason, the disk
cache won't be deleted. Any subsequent runs will then always fail at
the beginning of the test.

This patch ensures that the disk cache is cleared every time we run
the test.

* Tools/TestWebKitAPI/Tests/WebKitGLib/TestWebsiteData.cpp:
(testWebsiteDataCache):
* Tools/TestWebKitAPI/glib/TestExpectations.json:

Canonical link: https://commits.webkit.org/267289@main

Tools/TestWebKitAPI/Tests/WebKitGLib/TestWebsiteData.cpp

@@ -428,6 +428,9 @@ static void testWebsiteDataEphemeral(WebViewTest* test, gconstpointer)
 static void testWebsiteDataCache(WebsiteDataTest* test, gconstpointer)
 {
     static const WebKitWebsiteDataTypes cacheTypes = static_cast<WebKitWebsiteDataTypes>(WEBKIT_WEBSITE_DATA_MEMORY_CACHE | WEBKIT_WEBSITE_DATA_DISK_CACHE);
+
+    test->clear(cacheTypes, 0);
+
     GList* dataList = test->fetch(cacheTypes);
     g_assert_null(dataList);
 

Tools/TestWebKitAPI/glib/TestExpectations.json

@@ -89,7 +89,7 @@
     "TestWebsiteData": {
         "subtests": {
             "/webkit/WebKitWebsiteData/cache": {
-                "expected": {"wpe": {"status": ["FAIL", "CRASH", "PASS"], "bug": "webkit.org/b/260524"}}
+                "expected": {"wpe": {"status": ["CRASH", "PASS"], "bug": "webkit.org/b/260524"}}
             }
         }
     },