StringReplacer_test.cc

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#include "catch.hpp"
#include "StringReplacer.hh"
 
TEST_CASE("StringReplacer")
{
        // up-to-4 strings is a special case
        SECTION("no replacements") {
                static constexpr auto replacer = StringReplacer::create();
                CHECK(replacer("") == "");
                CHECK(replacer("foo") == "foo");
                CHECK(replacer("1234") == "1234");
        }
        SECTION("1 replacement") {
                static constexpr auto replacer = StringReplacer::create(
                        "foo", "bar");
                CHECK(replacer("") == "");
                CHECK(replacer("foo") == "bar");
                CHECK(replacer("1234") == "1234");
        }
        SECTION("2 replacements") {
                static constexpr auto replacer = StringReplacer::create(
                        "foo", "bar",
                        "qux", "baz");
                CHECK(replacer("") == "");
                CHECK(replacer("foo") == "bar");
                CHECK(replacer("qux") == "baz");
                CHECK(replacer("Qux") == "Qux"); // case sensitive
                CHECK(replacer("1234") == "1234");
        }
        SECTION("3 replacements") {
                static constexpr auto replacer = StringReplacer::create(
                        "foo", "bar",
                        "qux", "baz",
                        "a", "b");
                CHECK(replacer("") == "");
                CHECK(replacer("foo") == "bar");
                CHECK(replacer("qux") == "baz");
                CHECK(replacer("a") == "b");
                CHECK(replacer("1234") == "1234");
        }
        SECTION("4 replacements") {
                static constexpr auto replacer = StringReplacer::create(
                        "foo", "bar",
                        "qux", "baz",
                        "a", "b",
                        "1", "one");
                CHECK(replacer("") == "");
                CHECK(replacer("foo") == "bar");
                CHECK(replacer("qux") == "baz");
                CHECK(replacer("a") == "b");
                CHECK(replacer("1") == "one");
                CHECK(replacer("1234") == "1234");
        }
        // more than 4 switches to a different internal implementation
        SECTION("many replacements") {
                static constexpr auto replacer = StringReplacer::create(
                        "1", "one",
                        "22", "two",
                        "333", "three",
                        "4444", "four",
                        "5", "five",
                        "6", "six",
                        "777", "seven",
                        "8", "eight",
                        "9", "nine",
                        "10101010", "ten");
                CHECK(replacer("1") == "one");
                CHECK(replacer("22") == "two");
                CHECK(replacer("333") == "three");
                CHECK(replacer("4444") == "four");
                CHECK(replacer("5") == "five");
                CHECK(replacer("6") == "six");
                CHECK(replacer("777") == "seven");
                CHECK(replacer("8") == "eight");
                CHECK(replacer("9") == "nine");
                CHECK(replacer("10101010") == "ten");
 
                CHECK(replacer("") == "");
                CHECK(replacer("foo") == "foo");
                CHECK(replacer("11") == "11");
                CHECK(replacer("7") == "7");
        }
}