Bug 1221758 - don't run cache2 tests when cache2 isn't used. r=michal.novotny

Was causing test failures for Thunderbird where cache2 isn't in use yet.

netwerk/test/unit/test_cache2-30a-entry-pinning.js

@@ -1,6 +1,10 @@
 function run_test()
 {
   do_get_profile();
+  if (!newCacheBackEndUsed()) {
+    do_check_true(true, "This test checks only cache2 specific behavior.");
+    return;
+  }
 
   // Open for write, write
   asyncOpenCacheEntry("http://a/", "pin", Ci.nsICacheStorage.OPEN_TRUNCATE, LoadContextInfo.default,

netwerk/test/unit/test_cache2-30b-pinning-storage-clear.js

@@ -1,6 +1,10 @@
 function run_test()
 {
   do_get_profile();
+  if (!newCacheBackEndUsed()) {
+    do_check_true(true, "This test checks only cache2 specific behavior.");
+    return;
+  }
   var lci = LoadContextInfo.default;
 
   // Open a pinned entry for write, write

netwerk/test/unit/test_cache2-30c-pinning-deferred-doom.js

@@ -26,6 +26,11 @@ function log_(msg) { if (true) dump(">>>>>>>>>>>>> " + msg + "\n"); }
 function run_test()
 {
   do_get_profile();
+  if (!newCacheBackEndUsed()) {
+    do_check_true(true, "This test checks only cache2 specific behavior.");
+    return;
+  }
+
   var lci = LoadContextInfo.default;
   var testingInterface = get_cache_service().QueryInterface(Ci.nsICacheTesting);
   do_check_true(testingInterface);

netwerk/test/unit/test_cache2-30d-pinning-WasEvicted-API.js

@@ -22,6 +22,10 @@ function log_(msg) { if (true) dump(">>>>>>>>>>>>> " + msg + "\n"); }
 function run_test()
 {
   do_get_profile();
+  if (!newCacheBackEndUsed()) {
+    do_check_true(true, "This test checks only cache2 specific behavior.");
+    return;
+  }
   var lci = LoadContextInfo.default;
   var testingInterface = get_cache_service().QueryInterface(Ci.nsICacheTesting);
   do_check_true(testingInterface);

netwerk/test/unit/test_cache_jar.js

@@ -89,6 +89,10 @@ function run_all_tests() {
 var gTests;
 function run_test() {
   do_get_profile();
+  if (!newCacheBackEndUsed()) {
+    do_check_true(true, "This test checks only cache2 specific behavior.");
+    return;
+  }
   do_test_pending();
   httpserv = new HttpServer();
   httpserv.registerPathHandler("/cached", cached_handler);

netwerk/test/unit_ipc/test_cache_jar_wrap.js

@@ -1,3 +1,4 @@
 function run_test() {
+  run_test_in_child("../unit/head_cache2.js");
   run_test_in_child("../unit/test_cache_jar.js");
 }