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nix-util: Add concatMapStrings

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Robert Hensing 2025-01-18 09:44:46 +01:00 • committed by Sergei Trofimovich
parent bbdc3197a9
commit f3dbaa3f54
2 changed files with 50 additions and 0 deletions
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36
src/libutil-tests/strings.cc
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@ -80,6 +80,42 @@ TEST(concatStringsSep, buildSingleString)
ASSERT_EQ(concatStringsSep(",", strings), "this");
}
TEST(concatMapStringsSep, empty)
{
Strings strings;
ASSERT_EQ(concatMapStringsSep(",", strings, [](const std::string & s) { return s; }), "");
}
TEST(concatMapStringsSep, justOne)
{
Strings strings;
strings.push_back("this");
ASSERT_EQ(concatMapStringsSep(",", strings, [](const std::string & s) { return s; }), "this");
}
TEST(concatMapStringsSep, two)
{
Strings strings;
strings.push_back("this");
strings.push_back("that");
ASSERT_EQ(concatMapStringsSep(",", strings, [](const std::string & s) { return s; }), "this,that");
}
TEST(concatMapStringsSep, map)
{
std::map<std::string, std::string> strings;
strings["this"] = "that";
strings["1"] = "one";
ASSERT_EQ(
concatMapStringsSep(
", ", strings, [](const std::pair<std::string, std::string> & s) { return s.first + " -> " + s.second; }),
"1 -> one, this -> that");
}
/* ----------------------------------------------------------------------------
* dropEmptyInitThenConcatStringsSep
* --------------------------------------------------------------------------*/