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◆ main openmsx / src / unittest / strCat.cc
8.7 KiB · C++ · last changed chore(): initial commit 1 month ago source blame history raw
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#include "catch.hpp"
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#include "strCat.hh"
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#include <array>
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static std::string rValue()
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{
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	return "bar";
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}
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TEST_CASE("strCat")
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{
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	std::string str = "abc";
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	std::string_view sr = "xyz";
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	const char* literal = "foo";
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	std::array<char, 100> buf; buf[0] = 'q'; buf[1] = 'u'; buf[2] = 'x'; buf[3] = '\0';
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	char c = '-';
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	unsigned char uc = 222;
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	int m = -31;
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	int i = 123456;
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	float f = 6.28f;
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	double d = -1.234;
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	SECTION("zero") {
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		CHECK(strCat() == "");
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	}
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	SECTION("one") {
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		CHECK(strCat(rValue()) == "bar");
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		CHECK(strCat(str) == "abc");
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		CHECK(strCat(sr) == "xyz");
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		CHECK(strCat(literal) == "foo");
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		CHECK(strCat(buf.data()) == "qux");
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		CHECK(strCat(c) == "-");
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		CHECK(strCat(uc) == "222");
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		CHECK(strCat(m) == "-31");
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		CHECK(strCat(i) == "123456");
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		CHECK(strCat(f) == "6.280000");
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		CHECK(strCat(d) == "-1.234000");
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		CHECK(strCat(hex_string<8>(i)) == "0001e240");
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		CHECK(strCat(hex_string<4>(i)) == "e240");
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		CHECK(strCat(hex_string<4, HexCase::upper>(i)) == "E240");
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		CHECK(strCat(hex_string(Digits{5}, i)) == "1e240");
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		CHECK(strCat(hex_string<HexCase::upper>(Digits{5}, i)) == "1E240");
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		CHECK(strCat(hex_string(Digits{3}, i)) == "240");
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		CHECK(strCat(bin_string<16>(i)) == "1110001001000000");
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		CHECK(strCat(bin_string<8>(i)) == "01000000");
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		CHECK(strCat(bin_string(uint8_t(0))) == "0");
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		CHECK(strCat(bin_string(uint8_t(11))) == "1011");
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		CHECK(strCat(bin_string(uint8_t(131))) == "10000011");
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		CHECK(strCat(bin_string(int8_t(11))) == "1011");
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		CHECK(strCat(bin_string(int8_t(-11))) == "11110101");
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		CHECK(strCat(bin_string(1234)) == "10011010010");
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		CHECK(strCat(bin_string(uint64_t(123))) == "1111011");
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		CHECK(strCat(bin_string(int64_t(-123))) == "1111111111111111111111111111111111111111111111111111111110000101");
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		CHECK(strCat(dec_string<8>(i)) == "  123456");
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		CHECK(strCat(dec_string<6>(i)) == "123456");
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		CHECK(strCat(dec_string<4>(i)) == "3456");
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		CHECK(strCat(spaces(5)) == "     ");
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	}
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	SECTION("two") {
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		CHECK(strCat(str, i) == "abc123456");
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		CHECK(strCat(str, m) == "abc-31");
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		CHECK(strCat(str, uc) == "abc222");
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		CHECK(strCat(i, str) == "123456abc");
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		CHECK(strCat(m, str) == "-31abc");
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		CHECK(strCat(uc, str) == "222abc");
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		CHECK(strCat(buf.data(), i) == "qux123456");
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		CHECK(strCat(literal, m) == "foo-31");
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		CHECK(strCat(i, m) == "123456-31");
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		CHECK(strCat(c, m) == "--31");
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		CHECK(strCat(i, rValue()) == "123456bar");
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		CHECK(strCat(spaces(4), i) == "    123456");
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		CHECK(strCat(hex_string<3>(i), i) == "240123456");
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		CHECK(strCat(c, hex_string<1>(i)) == "-0");
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		CHECK(strCat(rValue(), uc) == "bar222");
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		// these have special overloads
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		CHECK(strCat(str, str) == "abcabc");
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		CHECK(strCat(literal, str) == "fooabc");
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		CHECK(strCat(c, str) == "-abc");
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		CHECK(strCat(str, literal) == "abcfoo");
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		CHECK(strCat(str, c) == "abc-");
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		CHECK(strCat(rValue(), str) == "barabc");
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		CHECK(strCat(str, rValue()) == "abcbar");
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		CHECK(strCat(rValue(), rValue()) == "barbar");
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		CHECK(strCat(literal, rValue()) == "foobar");
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		CHECK(strCat(c, rValue()) == "-bar");
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		CHECK(strCat(rValue(), literal) == "barfoo");
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		CHECK(strCat(rValue(), c) == "bar-");
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		CHECK(strCat(rValue(), sr) == "barxyz");
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	}
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	SECTION("three") {
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		CHECK(strCat(str, str, str) == "abcabcabc");
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		CHECK(strCat(i, m, c) == "123456-31-");
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		CHECK(strCat(literal, buf.data(), rValue()) == "fooquxbar");
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		// 1st an r-value is a special case
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		CHECK(strCat(rValue(), i, literal) == "bar123456foo");
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		CHECK(strCat(rValue(), uc, buf.data()) == "bar222qux");
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	}
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	SECTION("many") {
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		CHECK(strCat(str, sr, literal, buf.data(), c, uc, m, i, rValue(), spaces(2), hex_string<2>(255)) ==
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		      "abcxyzfooqux-222-31123456bar  ff");
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		CHECK(strCat(rValue(), uc, buf.data(), c, spaces(2), str, i, hex_string<3>(9999), sr, literal, m) ==
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		      "bar222qux-  abc12345670fxyzfoo-31");
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	}
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}
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template<typename... Args>
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static void testAppend(const std::string& expected, Args&& ...args)
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{
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	std::string s1;
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	strAppend(s1, std::forward<Args>(args)...);
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	CHECK(s1 == expected);
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	std::string s2 = "abcdefghijklmnopqrstuvwxyz";
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	strAppend(s2, std::forward<Args>(args)...);
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	CHECK(s2 == ("abcdefghijklmnopqrstuvwxyz" + expected));
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}
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TEST_CASE("strAppend")
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{
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	std::string str = "mno";
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	std::string_view sr = "rst";
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	const char* literal = "ijklmn";
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	std::array<char, 100> buf; buf[0] = 'd'; buf[1] = 'e'; buf[2] = '\0'; buf[3] = 'f';
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	char c = '+';
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	unsigned u = 4294967295u;
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	long long ll = -876;
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	SECTION("zero") {
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		testAppend("");
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	}
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	SECTION("one") {
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		testAppend("bar", rValue());
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		testAppend("mno", str);
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		testAppend("rst", sr);
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		testAppend("ijklmn", literal);
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		testAppend("de", buf.data());
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		testAppend("+", c);
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		testAppend("4294967295", u);
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		testAppend("-876", ll);
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		testAppend("          ", spaces(10));
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		testAppend("fffffffc94", hex_string<10>(ll));
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	}
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	SECTION("many") {
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		std::string s = "bla";
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		strAppend(s, str, sr, literal, spaces(3));
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		strAppend(s, buf.data(), c, u, ll, rValue());
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		CHECK(s == "blamnorstijklmn   de+4294967295-876bar");
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	}
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}
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TEST_CASE("strCat_if")
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{
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	SECTION("if only") {
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		CHECK(strCat("foo", strCat_if(true, "bla", 42, ' ')) == "foobla42 ");
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		CHECK(strCat("foo", strCat_if(false, "bla", 42, ' ')) == "foo");
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	}
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	SECTION("if else") {
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		CHECK(strCat("x", strCat_if(true, "a").else_("b"), "y") == "xay");
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		CHECK(strCat("x", strCat_if(false, "a").else_("b"), "y") == "xby");
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		CHECK(strCat("x", strCat_if(false, "a").else_("b", 7, ' '), "y") == "xb7 y");
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	}
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	SECTION("if else_if else chain") {
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		CHECK(strCat("bla", strCat_if(true, ' ').else_if(true, "t").else_("xyz"), "\n") == "bla \n");
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		CHECK(strCat("bla", strCat_if(false, ' ').else_if(true, "t").else_("xyz"), "\n") == "blat\n");
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		CHECK(strCat("bla", strCat_if(false, ' ').else_if(false, "t").else_("xyz"), "\n") == "blaxyz\n");
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		CHECK(strCat("x", strCat_if(false, "a").else_if(true, "b", 7, ' ').else_("z"), "y") == "xb7 y");
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	}
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	SECTION("if else_if without else") {
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		CHECK(strCat("x", strCat_if(false, "a").else_if(false, "b"), "y") == "xy");
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		CHECK(strCat("x", strCat_if(false, "a").else_if(true, "b"), "y") == "xby");
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	}
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	SECTION("zero-arg branches are allowed") {
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		CHECK(strCat("x", strCat_if(true), "y") == "xy");
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		CHECK(strCat("x", strCat_if(false), "y") == "xy");
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		CHECK(strCat("x", strCat_if(false, "a").else_if(true), "y") == "xy");
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		CHECK(strCat("x", strCat_if(false, "a").else_if(false).else_(), "y") == "xy");
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	}
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}
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TEST_CASE("lazy")
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{
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	SECTION("basic usage in strCat") {
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		CHECK(strCat("a", strCat_lazy([&]{ return std::string("b"); }), "c") == "abc");
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		CHECK(strCat("x", strCat_lazy([&]{ return 42; }), "y") == "x42y");
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		CHECK(strCat(strCat_lazy([&]{ return "foo"; })) == "foo");
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	}
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	SECTION("lazy with strCat_if - condition true, lambda invoked") {
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		int callCount = 0;
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		CHECK(strCat("pre", strCat_if(true, strCat_lazy([&]{
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			++callCount;
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			return "mid";
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		})), "suf") == "premidsuf");
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		CHECK(callCount == 1);
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	}
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	SECTION("lazy with strCat_if - condition false, lambda not invoked") {
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		int callCount = 0;
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		CHECK(strCat("pre", strCat_if(false, strCat_lazy([&]{
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			++callCount;
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			return "mid";
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		})), "suf") == "presuf");
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		CHECK(callCount == 0);
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	}
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	SECTION("lazy with else_ - condition false, lambda invoked for else") {
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		int callCount = 0;
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		CHECK(strCat("x", strCat_if(false, "a").else_(strCat_lazy([&]{
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			++callCount;
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			return "b";
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		})), "y") == "xby");
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		CHECK(callCount == 1);
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	}
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	SECTION("lazy with else_ - condition true, else lambda not invoked") {
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		int callCount = 0;
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		CHECK(strCat("x", strCat_if(true, "a").else_(strCat_lazy([&]{
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			++callCount;
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			return "b";
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		})), "y") == "xay");
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		CHECK(callCount == 0);
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	}
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	SECTION("lazy with else_if - only invoked when that branch is taken") {
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		int callCount = 0;
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		CHECK(strCat("x", strCat_if(false, "a").else_if(true, strCat_lazy([&]{
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			++callCount;
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			return "b";
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		})), "y") == "xby");
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		CHECK(callCount == 1);
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		callCount = 0;
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		CHECK(strCat("x", strCat_if(true, "a").else_if(true, strCat_lazy([&]{
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			++callCount;
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			return "b";
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		})), "y") == "xay");
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		CHECK(callCount == 0);
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	}
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	SECTION("compare with/without lazy") {
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		int i = 0;
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		CHECK(strCat("a", strCat_if(false, STRCAT_LAZY(++i)), "z") == "az");
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		CHECK(i == 0);
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		CHECK(strCat("a", strCat_if(false, ++i), "z") == "az");
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		CHECK(i == 1);
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	}
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}
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#if 0
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// Not part of the actual unittest. Can be used to (manually) inspect the
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// quality of the generated code.
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auto test1(int i) { return strCat(i); }
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auto test1b(int i) { return std::to_string(i); }
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auto test2(const char* s) { return strCat(s); }
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auto test3(std::string_view s) { return strCat(s); }
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auto test4(const std::string& s) { return strCat(s); }
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auto test5() { return strCat("bla"); }
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auto test6() { return strCat('a'); }
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auto test7(char i) { return strCat('a', i, "bla"); }
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auto test8(int i, unsigned u) { return strCat(i, u); }
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auto testA1(const std::string& s1, const std::string& s2) { return strCat(s1, s2); }
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auto testA2(const std::string& s1, const std::string& s2) { return s1 + s2; }
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#endif