Improve formatting and add tests

YUViewLib/src/common/Formatting.h

@@ -51,7 +51,7 @@ template <typename T> std::string to_string(const std::pair<T, T> &typePair)
   return stream.str();
 }
 
-template <typename T> std::ostream &operator<<(std::ostream &stream, const std::vector<T> vec)
+template <typename T> std::ostream &operator<<(std::ostream &stream, const std::vector<T> &vec)
 {
   stream << "[";
   for (auto it = vec.begin(); it != vec.end(); it++)
@@ -64,7 +64,7 @@ template <typename T> std::ostream &operator<<(std::ostream &stream, const std::
   return stream;
 }
 
-template <typename T> std::string to_string(const std::vector<T> vec)
+template <typename T> std::string to_string(const std::vector<T> &vec)
 {
   std::ostringstream stream;
   stream << vec;
@@ -93,7 +93,7 @@ template <typename T>
 static std::ostream &operator<<(std::ostream &stream, const std::optional<T> &opt)
 {
   if (opt)
-    stream << opt;
+    stream << opt.value();
   else
     stream << "NA";
   return stream;

YUViewUnitTest/common/FormattingTest.cpp

@@ -0,0 +1,88 @@
+/*  This file is part of YUView - The YUV player with advanced analytics toolset
+ *   <https://github.com/IENT/YUView>
+ *   Copyright (C) 2015  Institut für Nachrichtentechnik, RWTH Aachen University, GERMANY
+ *
+ *   This program is free software; you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation; either version 3 of the License, or
+ *   (at your option) any later version.
+ *
+ *   In addition, as a special exception, the copyright holders give
+ *   permission to link the code of portions of this program with the
+ *   OpenSSL library under certain conditions as described in each
+ *   individual source file, and distribute linked combinations including
+ *   the two.
+ *
+ *   You must obey the GNU General Public License in all respects for all
+ *   of the code used other than OpenSSL. If you modify file(s) with this
+ *   exception, you may extend this exception to your version of the
+ *   file(s), but you are not obligated to do so. If you do not wish to do
+ *   so, delete this exception statement from your version. If you delete
+ *   this exception statement from all source files in the program, then
+ *   also delete it here.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ *   GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <common/Testing.h>
+
+#include <common/Formatting.h>
+
+namespace
+{
+
+template <typename T> void runFormatTest(const T &value, const std::string_view expectedString)
+{
+  std::ostringstream stream;
+  stream << value;
+  EXPECT_EQ(stream.str(), expectedString);
+  EXPECT_EQ(to_string(value), expectedString);
+}
+
+TEST(FormattingTest, FormattingOfPair)
+{
+  runFormatTest(std::make_pair(11, 472), "(11, 472)");
+  runFormatTest(std::make_pair(11.0, 472.23), "(11, 472.23)");
+  runFormatTest(std::make_pair("abcde", "ghij"), "(abcde, ghij)");
+}
+
+TEST(FormattingTest, FormattingOfVector)
+{
+  runFormatTest(std::vector<int>({8, 22, 99, 0}), "[8, 22, 99, 0]");
+  runFormatTest(std::vector<double>({8.22, 22.12, 99.0, 0.01}), "[8.22, 22.12, 99, 0.01]");
+  runFormatTest(std::vector<std::string>({"abc", "def", "g", "hi"}), "[abc, def, g, hi]");
+}
+
+TEST(FormattingTest, FormattingOfSize)
+{
+  runFormatTest(Size(124, 156), "124x156");
+  runFormatTest(Size(999, 125682), "999x125682");
+}
+
+TEST(FormattingTest, FormattingOfBool)
+{
+  EXPECT_EQ(to_string(false), "False");
+  EXPECT_EQ(to_string(true), "True");
+}
+
+TEST(FormattingTest, FormattingOfOptional)
+{
+  runFormatTest(std::optional<int>(), "NA");
+  runFormatTest(std::make_optional<int>(22), "22");
+  runFormatTest(std::make_optional<double>(22.556), "22.556");
+  runFormatTest(std::make_optional<std::string>("Test234"), "Test234");
+}
+
+TEST(FormattingTest, StringReplaceAll)
+{
+    EXPECT_EQ(stringReplaceAll("abcdefghi", 'c', 'g'), "abgdefghi");
+    EXPECT_EQ(stringReplaceAll("abcdefghijklmn", {'c', 'h', 'm'}, 'g'), "abgdefggijklgn");
+}
+
+} // namespace