[OBSOLETE] tracing: split trace event filter logic out of TraceLog

base/trace_event/event_name_filter_unittest.cc

Index: base/trace_event/event_name_filter_unittest.cc
diff --git a/base/trace_event/event_name_filter_unittest.cc b/base/trace_event/event_name_filter_unittest.cc
new file mode 100644
index 0000000000000000000000000000000000000000..1d8d9e6c624997c138dc751650f4345b26da214e
--- /dev/null
+++ b/base/trace_event/event_name_filter_unittest.cc
@@ -0,0 +1,48 @@
+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "base/trace_event/event_name_filter.h"
+
+#include "base/memory/ptr_util.h"
+#include "base/trace_event/trace_event_impl.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace base {
+namespace trace_event {
+
+const TraceEvent& MakeTraceEvent(const char* name) {
+  static TraceEvent event;
+  event.Reset();
+  event.Initialize(0, TimeTicks(), ThreadTicks(), 'b', nullptr, name, "", 0, 0,
+                   0, nullptr, nullptr, nullptr, nullptr, 0);
+  return event;
+}
+
+TEST(TraceEventNameFilterTest, Whitelist) {
+  EventNameFilter filter;
+
+  // No events should be filtered if the filter is not initialized.
+  EXPECT_FALSE(filter.FilterTraceEvent(MakeTraceEvent("foo")));
+
+  auto whitelist = MakeUnique<EventNameFilter::EventNamesWhitelist>();
+  whitelist->insert("foo");
+  whitelist->insert("bar");
+  filter.SetWhitelistedEventNames(std::move(whitelist));
+  EXPECT_TRUE(filter.FilterTraceEvent(MakeTraceEvent("foo")));
+  EXPECT_FALSE(filter.FilterTraceEvent(MakeTraceEvent("fooz")));
+  EXPECT_FALSE(filter.FilterTraceEvent(MakeTraceEvent("afoo")));
+  EXPECT_TRUE(filter.FilterTraceEvent(MakeTraceEvent("bar")));
+  EXPECT_FALSE(filter.FilterTraceEvent(MakeTraceEvent("foobar")));
+
+  // Test that no stale state is left over when re-initializing.
+  whitelist.reset(new EventNameFilter::EventNamesWhitelist());
+  whitelist->insert("baz");
+  filter.SetWhitelistedEventNames(std::move(whitelist));
+  EXPECT_FALSE(filter.FilterTraceEvent(MakeTraceEvent("foo")));
+  EXPECT_FALSE(filter.FilterTraceEvent(MakeTraceEvent("bar")));
+  EXPECT_TRUE(filter.FilterTraceEvent(MakeTraceEvent("baz")));
+}
+
+}  // namespace trace_event
+}  // namespace base