1 files changed, 148 insertions, 0 deletions
diff --git a/netwerk/test/unit/test_cache2-30d-pinning-WasEvicted-API.js b/netwerk/test/unit/test_cache2-30d-pinning-WasEvicted-API.js
new file mode 100644
index 0000000000..cf6e463a70
--- /dev/null
+++ b/netwerk/test/unit/test_cache2-30d-pinning-WasEvicted-API.js
@@ -0,0 +1,148 @@
+/*
+
+This test exercises the CacheFileContextEvictor::WasEvicted API and code using it.
+
+- We store 10+10 (pinned and non-pinned) entries to the cache, wait for them being written.
+- Then we purge the memory pools.
+- Now the IO thread is suspended on the EVICT (7) level to prevent actual deletion of the files.
+- Index is disabled.
+- We do clear() of the cache, this creates the "ce_*" file and posts to the EVICT level
+  the eviction loop mechanics.
+- We open again those 10+10 entries previously stored.
+- IO is resumed
+- We expect to get all the pinned and
+  loose all the non-pinned (common) entries.
+
+*/
+
+"use strict";
+
+const kENTRYCOUNT = 10;
+
+function log_(msg) {
+  if (true) {
+    dump(">>>>>>>>>>>>> " + msg + "\n");
+  }
+}
+
+function run_test() {
+  do_get_profile();
+
+  var lci = Services.loadContextInfo.default;
+  var testingInterface = Services.cache2.QueryInterface(Ci.nsICacheTesting);
+  Assert.ok(testingInterface);
+
+  var mc = new MultipleCallbacks(
+    1,
+    function() {
+      // (2)
+
+      mc = new MultipleCallbacks(1, finish_cache2_test);
+      // Release all references to cache entries so that they can be purged
+      // Calling gc() four times is needed to force it to actually release
+      // entries that are obviously unreferenced.  Yeah, I know, this is wacky...
+      gc();
+      gc();
+      executeSoon(() => {
+        gc();
+        gc();
+        log_("purging");
+
+        // Invokes cacheservice:purge-memory-pools when done.
+        Services.cache2.purgeFromMemory(
+          Ci.nsICacheStorageService.PURGE_EVERYTHING
+        ); // goes to (3)
+      });
+    },
+    true
+  );
+
+  // (1), here we start
+
+  log_("first set of opens");
+  var i;
+  for (i = 0; i < kENTRYCOUNT; ++i) {
+    // Callbacks 1-20
+    mc.add();
+    asyncOpenCacheEntry(
+      "http://pinned" + i + "/",
+      "pin",
+      Ci.nsICacheStorage.OPEN_TRUNCATE,
+      lci,
+      new OpenCallback(NEW | WAITFORWRITE, "m" + i, "p" + i, function(entry) {
+        mc.fired();
+      })
+    );
+
+    mc.add();
+    asyncOpenCacheEntry(
+      "http://common" + i + "/",
+      "disk",
+      Ci.nsICacheStorage.OPEN_TRUNCATE,
+      lci,
+      new OpenCallback(NEW | WAITFORWRITE, "m" + i, "d" + i, function(entry) {
+        mc.fired();
+      })
+    );
+  }
+
+  mc.fired(); // Goes to (2)
+
+  Services.obs.addObserver(
+    {
+      observe(subject, topic, data) {
+        // (3)
+
+        log_("after purge");
+        // Prevent the I/O thread from evicting physically the data.  We first want to re-open the entries.
+        // This deterministically emulates a slow hard drive.
+        testingInterface.suspendCacheIOThread(7);
+
+        log_("clearing");
+        // Now clear everything except pinned.  Stores the "ce_*" file and schedules background eviction.
+        Services.cache2.clear();
+        log_("cleared");
+
+        log_("second set of opens");
+        // Now open again.  Pinned entries should be there, disk entries should be the renewed entries.
+        // Callbacks 21-40
+        for (i = 0; i < kENTRYCOUNT; ++i) {
+          mc.add();
+          asyncOpenCacheEntry(
+            "http://pinned" + i + "/",
+            "disk",
+            Ci.nsICacheStorage.OPEN_NORMALLY,
+            lci,
+            new OpenCallback(NORMAL, "m" + i, "p" + i, function(entry) {
+              mc.fired();
+            })
+          );
+
+          mc.add();
+          asyncOpenCacheEntry(
+            "http://common" + i + "/",
+            "disk",
+            Ci.nsICacheStorage.OPEN_NORMALLY,
+            lci,
+            new OpenCallback(NEW, "m2" + i, "d2" + i, function(entry) {
+              mc.fired();
+            })
+          );
+        }
+
+        // Resume IO, this will just pop-off the CacheFileContextEvictor::EvictEntries() because of
+        // an early check on CacheIOThread::YieldAndRerun() in that method.
+        // CacheFileIOManager::OpenFileInternal should now run and CacheFileContextEvictor::WasEvicted
+        // should be checked on.
+        log_("resuming");
+        testingInterface.resumeCacheIOThread();
+        log_("resumed");
+
+        mc.fired(); // Finishes this test
+      },
+    },
+    "cacheservice:purge-memory-pools"
+  );
+
+  do_test_pending();
+}