1 files changed, 52 insertions, 0 deletions
diff --git a/third_party/libwebrtc/rtc_base/strings/string_format_unittest.cc b/third_party/libwebrtc/rtc_base/strings/string_format_unittest.cc
new file mode 100644
index 0000000000..5531001979
--- /dev/null
+++ b/third_party/libwebrtc/rtc_base/strings/string_format_unittest.cc
@@ -0,0 +1,52 @@
+/*
+ *  Copyright 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 "rtc_base/strings/string_format.h"
+
+#include <vector>
+
+#include "absl/strings/string_view.h"
+#include "rtc_base/checks.h"
+#include "rtc_base/string_encode.h"
+#include "test/gtest.h"
+
+namespace rtc {
+
+TEST(StringFormatTest, Empty) {
+  EXPECT_EQ("", StringFormat("%s", ""));
+}
+
+TEST(StringFormatTest, Misc) {
+  EXPECT_EQ("123hello w", StringFormat("%3d%2s %1c", 123, "hello", 'w'));
+  EXPECT_EQ("3 = three", StringFormat("%d = %s", 1 + 2, "three"));
+}
+
+TEST(StringFormatTest, MaxSizeShouldWork) {
+  const int kSrcLen = 512;
+  char str[kSrcLen];
+  std::fill_n(str, kSrcLen, 'A');
+  str[kSrcLen - 1] = 0;
+  EXPECT_EQ(str, StringFormat("%s", str));
+}
+
+// Test that formating a string using `absl::string_view` works as expected
+// whe using `%.*s`.
+TEST(StringFormatTest, FormatStringView) {
+  const std::string main_string("This is a substring test.");
+  std::vector<absl::string_view> string_views = rtc::split(main_string, ' ');
+  ASSERT_EQ(string_views.size(), 5u);
+
+  const absl::string_view& sv = string_views[3];
+  std::string formatted =
+      StringFormat("We have a %.*s.", static_cast<int>(sv.size()), sv.data());
+  EXPECT_EQ(formatted.compare("We have a substring."), 0);
+}
+
+}  // namespace rtc