summaryrefslogtreecommitdiffstats
path: root/third_party/libwebrtc/api/field_trials_registry.h
diff options
context:
space:
mode:
Diffstat (limited to 'third_party/libwebrtc/api/field_trials_registry.h')
-rw-r--r--third_party/libwebrtc/api/field_trials_registry.h54
1 files changed, 54 insertions, 0 deletions
diff --git a/third_party/libwebrtc/api/field_trials_registry.h b/third_party/libwebrtc/api/field_trials_registry.h
new file mode 100644
index 0000000000..dc7e8445b1
--- /dev/null
+++ b/third_party/libwebrtc/api/field_trials_registry.h
@@ -0,0 +1,54 @@
+/*
+ * Copyright 2022 The WebRTC project authors. All Rights Reserved.
+ *
+ * Use of this source code is governed by a BSD-style license
+ * that can be found in the LICENSE file in the root of the source
+ * tree. An additional intellectual property rights grant can be found
+ * in the file PATENTS. All contributing project authors may
+ * be found in the AUTHORS file in the root of the source tree.
+ */
+#ifndef API_FIELD_TRIALS_REGISTRY_H_
+#define API_FIELD_TRIALS_REGISTRY_H_
+
+#include <string>
+#include <utility>
+
+#include "absl/strings/string_view.h"
+#include "api/field_trials_view.h"
+#include "rtc_base/containers/flat_set.h"
+#include "rtc_base/system/rtc_export.h"
+
+namespace webrtc {
+
+// Abstract base class for a field trial registry that verifies that any looked
+// up key has been pre-registered in accordance with `g3doc/field-trials.md`.
+class RTC_EXPORT FieldTrialsRegistry : public FieldTrialsView {
+ public:
+ FieldTrialsRegistry() = default;
+
+ FieldTrialsRegistry(const FieldTrialsRegistry&) = default;
+ FieldTrialsRegistry& operator=(const FieldTrialsRegistry&) = default;
+
+ ~FieldTrialsRegistry() override = default;
+
+ // Verifies that `key` is a registered field trial and then returns the
+ // configured value for `key` or an empty string if the field trial isn't
+ // configured.
+ std::string Lookup(absl::string_view key) const override;
+
+ // Register additional `keys` for testing. This should only be used for
+ // imaginary keys that are never used outside test code.
+ void RegisterKeysForTesting(flat_set<std::string> keys) {
+ test_keys_ = std::move(keys);
+ }
+
+ private:
+ virtual std::string GetValue(absl::string_view key) const = 0;
+
+ // Imaginary keys only used for testing.
+ flat_set<std::string> test_keys_;
+};
+
+} // namespace webrtc
+
+#endif // API_FIELD_TRIALS_REGISTRY_H_