join_test.cc

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#include "catch.hpp"
#include "join.hh"
 
#include "strCat.hh"
#include "view.hh"
#include <string_view>
 
TEST_CASE("join: vector<string_view>, char")
{
        auto check = [](const std::vector<std::string_view>& v, std::string_view expected) {
                std::string result = join(v, '-');
                CHECK(result == expected);
        };
 
        check({}, "");
        check({""}, "");
        check({"foo"}, "foo");
        check({"", ""}, "-");
        check({"foo", ""}, "foo-");
        check({"", "foo"}, "-foo");
        check({"foo", "bar"}, "foo-bar");
        check({"foo", "bar", "qux"}, "foo-bar-qux");
        check({"", "bar", "qux"}, "-bar-qux");
        check({"foo", "bar", ""}, "foo-bar-");
}
 
TEST_CASE("join: various types")
{
        std::vector<std::string> vs = {"foo", "bar", "qux"};
        std::vector<int> vi = {1, -89, 673, 0};
        std::array ac = {"blabla", "xyz", "4567"};
 
        char sep1 = '-';
        const char* sep2 = ", ";
        std::string sep3 = "<-->";
        int sep4 = 123;
 
        auto check = [](const auto& range, const auto& sep, std::string_view expected) {
                std::string result1 = join(range, sep);
                CHECK(result1 == expected);
 
                std::ostringstream ss;
                ss << join(range, sep);
                std::string result2 = ss.str();
                CHECK(result2 == expected);
        };
 
        check(vs, sep1, "foo-bar-qux");
        check(vs, sep2, "foo, bar, qux");
        check(vs, sep3, "foo<-->bar<-->qux");
        check(vs, sep4, "foo123bar123qux");
 
        check(vi, sep1, "1--89-673-0");
        check(vi, sep2, "1, -89, 673, 0");
        check(vi, sep3, "1<-->-89<-->673<-->0");
        check(vi, sep4, "1123-891236731230");
 
        check(ac, sep1, "blabla-xyz-4567");
        check(ac, sep2, "blabla, xyz, 4567");
        check(ac, sep3, "blabla<-->xyz<-->4567");
        check(ac, sep4, "blabla123xyz1234567");
 
        auto quote = [](auto& s) { return strCat('\'', s, '\''); };
        check(view::transform(vs, quote), ", ", "'foo', 'bar', 'qux'");
        check(view::transform(vi, quote), ", ", "'1', '-89', '673', '0'");
        check(view::transform(ac, quote), ", ", "'blabla', 'xyz', '4567'");
}