1 files changed, 57 insertions, 0 deletions
diff --git a/test/explicit_key_value_config.cc b/test/explicit_key_value_config.cc
new file mode 100644
index 0000000000..69f725a9e2
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+++ b/test/explicit_key_value_config.cc
@@ -0,0 +1,57 @@
+/*
+ *  Copyright (c) 2020 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.
+ */
+
+#include "test/explicit_key_value_config.h"
+
+#include "api/transport/webrtc_key_value_config.h"
+#include "rtc_base/checks.h"
+#include "system_wrappers/include/field_trial.h"
+
+namespace webrtc {
+namespace test {
+
+ExplicitKeyValueConfig::ExplicitKeyValueConfig(const std::string& s) {
+  std::string::size_type field_start = 0;
+  while (field_start < s.size()) {
+    std::string::size_type separator_pos = s.find('/', field_start);
+    RTC_CHECK_NE(separator_pos, std::string::npos)
+        << "Missing separator '/' after field trial key.";
+    RTC_CHECK_GT(separator_pos, field_start)
+        << "Field trial key cannot be empty.";
+    std::string key = s.substr(field_start, separator_pos - field_start);
+    field_start = separator_pos + 1;
+
+    RTC_CHECK_LT(field_start, s.size())
+        << "Missing value after field trial key. String ended.";
+    separator_pos = s.find('/', field_start);
+    RTC_CHECK_NE(separator_pos, std::string::npos)
+        << "Missing terminating '/' in field trial string.";
+    RTC_CHECK_GT(separator_pos, field_start)
+        << "Field trial value cannot be empty.";
+    std::string value = s.substr(field_start, separator_pos - field_start);
+    field_start = separator_pos + 1;
+
+    key_value_map_[key] = value;
+  }
+  // This check is technically redundant due to earlier checks.
+  // We nevertheless keep the check to make it clear that the entire
+  // string has been processed, and without indexing past the end.
+  RTC_CHECK_EQ(field_start, s.size());
+}
+
+std::string ExplicitKeyValueConfig::Lookup(absl::string_view key) const {
+  auto it = key_value_map_.find(std::string(key));
+  if (it != key_value_map_.end())
+    return it->second;
+  return "";
+}
+
+}  // namespace test
+}  // namespace webrtc