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87a4c07856e7dc69958019d47b2f02ae47746ec0 Export of internal Abseil changes. by Abseil Team - 4491d606df34c44efda47b6d17b605262f17e182 Export of internal Abseil changes. by Abseil Team GitOrigin-RevId: 44b0fafc62d9b8f192e8180cbe9c4b806b339d57 Change-Id: I2c427b5b41b2d34101922048b00f3d9dafcb498d --- absl/strings/internal/str_format/parser_test.cc | 391 ++++++++++++++++++++++++ 1 file changed, 391 insertions(+) create mode 100644 absl/strings/internal/str_format/parser_test.cc (limited to 'absl/strings/internal/str_format/parser_test.cc') diff --git a/absl/strings/internal/str_format/parser_test.cc b/absl/strings/internal/str_format/parser_test.cc new file mode 100644 index 00000000..14d90344 --- /dev/null +++ b/absl/strings/internal/str_format/parser_test.cc @@ -0,0 +1,391 @@ +#include "absl/strings/internal/str_format/parser.h" + +#include +#include "gtest/gtest.h" +#include "absl/base/macros.h" + +namespace absl { +inline namespace lts_2018_12_18 { +namespace str_format_internal { + +namespace { + +TEST(LengthModTest, Names) { + struct Expectation { + int line; + LengthMod::Id id; + const char *name; + }; + const Expectation kExpect[] = { + {__LINE__, LengthMod::none, "" }, + {__LINE__, LengthMod::h, "h" }, + {__LINE__, LengthMod::hh, "hh"}, + {__LINE__, LengthMod::l, "l" }, + {__LINE__, LengthMod::ll, "ll"}, + {__LINE__, LengthMod::L, "L" }, + {__LINE__, LengthMod::j, "j" }, + {__LINE__, LengthMod::z, "z" }, + {__LINE__, LengthMod::t, "t" }, + {__LINE__, LengthMod::q, "q" }, + }; + EXPECT_EQ(ABSL_ARRAYSIZE(kExpect), LengthMod::kNumValues); + for (auto e : kExpect) { + SCOPED_TRACE(e.line); + LengthMod mod = LengthMod::FromId(e.id); + EXPECT_EQ(e.id, mod.id()); + EXPECT_EQ(e.name, mod.name()); + } +} + +TEST(ConversionCharTest, Names) { + struct Expectation { + ConversionChar::Id id; + char name; + }; + // clang-format off + const Expectation kExpect[] = { +#define X(c) {ConversionChar::c, #c[0]} + X(c), X(C), X(s), X(S), // text + X(d), X(i), X(o), X(u), X(x), X(X), // int + X(f), X(F), X(e), X(E), X(g), X(G), X(a), X(A), // float + X(n), X(p), // misc +#undef X + {ConversionChar::none, '\0'}, + }; + // clang-format on + EXPECT_EQ(ABSL_ARRAYSIZE(kExpect), ConversionChar::kNumValues); + for (auto e : kExpect) { + SCOPED_TRACE(e.name); + ConversionChar v = ConversionChar::FromId(e.id); + EXPECT_EQ(e.id, v.id()); + EXPECT_EQ(e.name, v.Char()); + } +} + +class ConsumeUnboundConversionTest : public ::testing::Test { + public: + typedef UnboundConversion Props; + string_view Consume(string_view* src) { + int next = 0; + const char* prev_begin = src->data(); + o = UnboundConversion(); // refresh + ConsumeUnboundConversion(src, &o, &next); + return {prev_begin, static_cast(src->data() - prev_begin)}; + } + + bool Run(const char *fmt, bool force_positional = false) { + string_view src = fmt; + int next = force_positional ? -1 : 0; + o = UnboundConversion(); // refresh + return ConsumeUnboundConversion(&src, &o, &next) && src.empty(); + } + UnboundConversion o; +}; + +TEST_F(ConsumeUnboundConversionTest, ConsumeSpecification) { + struct Expectation { + int line; + string_view src; + string_view out; + string_view src_post; + }; + const Expectation kExpect[] = { + {__LINE__, "", "", "" }, + {__LINE__, "b", "", "b" }, // 'b' is invalid + {__LINE__, "ba", "", "ba"}, // 'b' is invalid + {__LINE__, "l", "", "l" }, // just length mod isn't okay + {__LINE__, "d", "d", "" }, // basic + {__LINE__, "d ", "d", " " }, // leave suffix + {__LINE__, "dd", "d", "d" }, // don't be greedy + {__LINE__, "d9", "d", "9" }, // leave non-space suffix + {__LINE__, "dzz", "d", "zz"}, // length mod as suffix + {__LINE__, "1$*2$d", "1$*2$d", "" }, // arg indexing and * allowed. + {__LINE__, "0-14.3hhd", "0-14.3hhd", ""}, // precision, width + {__LINE__, " 0-+#14.3hhd", " 0-+#14.3hhd", ""}, // flags + }; + for (const auto& e : kExpect) { + SCOPED_TRACE(e.line); + string_view src = e.src; + EXPECT_EQ(e.src, src); + string_view out = Consume(&src); + EXPECT_EQ(e.out, out); + EXPECT_EQ(e.src_post, src); + } +} + +TEST_F(ConsumeUnboundConversionTest, BasicConversion) { + EXPECT_FALSE(Run("")); + EXPECT_FALSE(Run("z")); + + EXPECT_FALSE(Run("dd")); // no excess allowed + + EXPECT_TRUE(Run("d")); + EXPECT_EQ('d', o.conv.Char()); + EXPECT_FALSE(o.width.is_from_arg()); + EXPECT_LT(o.width.value(), 0); + EXPECT_FALSE(o.precision.is_from_arg()); + EXPECT_LT(o.precision.value(), 0); + EXPECT_EQ(1, o.arg_position); + EXPECT_EQ(LengthMod::none, o.length_mod.id()); +} + +TEST_F(ConsumeUnboundConversionTest, ArgPosition) { + EXPECT_TRUE(Run("d")); + EXPECT_EQ(1, o.arg_position); + EXPECT_TRUE(Run("3$d")); + EXPECT_EQ(3, o.arg_position); + EXPECT_TRUE(Run("1$d")); + EXPECT_EQ(1, o.arg_position); + EXPECT_TRUE(Run("1$d", true)); + EXPECT_EQ(1, o.arg_position); + EXPECT_TRUE(Run("123$d")); + EXPECT_EQ(123, o.arg_position); + EXPECT_TRUE(Run("123$d", true)); + EXPECT_EQ(123, o.arg_position); + EXPECT_TRUE(Run("10$d")); + EXPECT_EQ(10, o.arg_position); + EXPECT_TRUE(Run("10$d", true)); + EXPECT_EQ(10, o.arg_position); + + // Position can't be zero. + EXPECT_FALSE(Run("0$d")); + EXPECT_FALSE(Run("0$d", true)); + EXPECT_FALSE(Run("1$*0$d")); + EXPECT_FALSE(Run("1$.*0$d")); + + // Position can't start with a zero digit at all. That is not a 'decimal'. + EXPECT_FALSE(Run("01$p")); + EXPECT_FALSE(Run("01$p", true)); + EXPECT_FALSE(Run("1$*01$p")); + EXPECT_FALSE(Run("1$.*01$p")); +} + +TEST_F(ConsumeUnboundConversionTest, WidthAndPrecision) { + EXPECT_TRUE(Run("14d")); + EXPECT_EQ('d', o.conv.Char()); + EXPECT_FALSE(o.width.is_from_arg()); + EXPECT_EQ(14, o.width.value()); + EXPECT_FALSE(o.precision.is_from_arg()); + EXPECT_LT(o.precision.value(), 0); + + EXPECT_TRUE(Run("14.d")); + EXPECT_FALSE(o.width.is_from_arg()); + EXPECT_FALSE(o.precision.is_from_arg()); + EXPECT_EQ(14, o.width.value()); + EXPECT_EQ(0, o.precision.value()); + + EXPECT_TRUE(Run(".d")); + EXPECT_FALSE(o.width.is_from_arg()); + EXPECT_LT(o.width.value(), 0); + EXPECT_FALSE(o.precision.is_from_arg()); + EXPECT_EQ(0, o.precision.value()); + + EXPECT_TRUE(Run(".5d")); + EXPECT_FALSE(o.width.is_from_arg()); + EXPECT_LT(o.width.value(), 0); + EXPECT_FALSE(o.precision.is_from_arg()); + EXPECT_EQ(5, o.precision.value()); + + EXPECT_TRUE(Run(".0d")); + EXPECT_FALSE(o.width.is_from_arg()); + EXPECT_LT(o.width.value(), 0); + EXPECT_FALSE(o.precision.is_from_arg()); + EXPECT_EQ(0, o.precision.value()); + + EXPECT_TRUE(Run("14.5d")); + EXPECT_FALSE(o.width.is_from_arg()); + EXPECT_FALSE(o.precision.is_from_arg()); + EXPECT_EQ(14, o.width.value()); + EXPECT_EQ(5, o.precision.value()); + + EXPECT_TRUE(Run("*.*d")); + EXPECT_TRUE(o.width.is_from_arg()); + EXPECT_EQ(1, o.width.get_from_arg()); + EXPECT_TRUE(o.precision.is_from_arg()); + EXPECT_EQ(2, o.precision.get_from_arg()); + EXPECT_EQ(3, o.arg_position); + + EXPECT_TRUE(Run("*d")); + EXPECT_TRUE(o.width.is_from_arg()); + EXPECT_EQ(1, o.width.get_from_arg()); + EXPECT_FALSE(o.precision.is_from_arg()); + EXPECT_LT(o.precision.value(), 0); + EXPECT_EQ(2, o.arg_position); + + EXPECT_TRUE(Run(".*d")); + EXPECT_FALSE(o.width.is_from_arg()); + EXPECT_LT(o.width.value(), 0); + EXPECT_TRUE(o.precision.is_from_arg()); + EXPECT_EQ(1, o.precision.get_from_arg()); + EXPECT_EQ(2, o.arg_position); + + // mixed implicit and explicit: didn't specify arg position. + EXPECT_FALSE(Run("*23$.*34$d")); + + EXPECT_TRUE(Run("12$*23$.*34$d")); + EXPECT_EQ(12, o.arg_position); + EXPECT_TRUE(o.width.is_from_arg()); + EXPECT_EQ(23, o.width.get_from_arg()); + EXPECT_TRUE(o.precision.is_from_arg()); + EXPECT_EQ(34, o.precision.get_from_arg()); + + EXPECT_TRUE(Run("2$*5$.*9$d")); + EXPECT_EQ(2, o.arg_position); + EXPECT_TRUE(o.width.is_from_arg()); + EXPECT_EQ(5, o.width.get_from_arg()); + EXPECT_TRUE(o.precision.is_from_arg()); + EXPECT_EQ(9, o.precision.get_from_arg()); + + EXPECT_FALSE(Run(".*0$d")) << "no arg 0"; + + // Large values + EXPECT_TRUE(Run("999999999.999999999d")); + EXPECT_FALSE(o.width.is_from_arg()); + EXPECT_EQ(999999999, o.width.value()); + EXPECT_FALSE(o.precision.is_from_arg()); + EXPECT_EQ(999999999, o.precision.value()); + + EXPECT_FALSE(Run("1000000000.999999999d")); + EXPECT_FALSE(Run("999999999.1000000000d")); +} + +TEST_F(ConsumeUnboundConversionTest, Flags) { + static const char kAllFlags[] = "-+ #0"; + static const int kNumFlags = ABSL_ARRAYSIZE(kAllFlags) - 1; + for (int rev = 0; rev < 2; ++rev) { + for (int i = 0; i < 1 << kNumFlags; ++i) { + std::string fmt; + for (int k = 0; k < kNumFlags; ++k) + if ((i >> k) & 1) fmt += kAllFlags[k]; + // flag order shouldn't matter + if (rev == 1) { std::reverse(fmt.begin(), fmt.end()); } + fmt += 'd'; + SCOPED_TRACE(fmt); + EXPECT_TRUE(Run(fmt.c_str())); + EXPECT_EQ(fmt.find('-') == std::string::npos, !o.flags.left); + EXPECT_EQ(fmt.find('+') == std::string::npos, !o.flags.show_pos); + EXPECT_EQ(fmt.find(' ') == std::string::npos, !o.flags.sign_col); + EXPECT_EQ(fmt.find('#') == std::string::npos, !o.flags.alt); + EXPECT_EQ(fmt.find('0') == std::string::npos, !o.flags.zero); + } + } +} + +TEST_F(ConsumeUnboundConversionTest, BasicFlag) { + // Flag is on + for (const char* fmt : {"d", "llx", "G", "1$X"}) { + SCOPED_TRACE(fmt); + EXPECT_TRUE(Run(fmt)); + EXPECT_TRUE(o.flags.basic); + } + + // Flag is off + for (const char* fmt : {"3d", ".llx", "-G", "1$#X"}) { + SCOPED_TRACE(fmt); + EXPECT_TRUE(Run(fmt)); + EXPECT_FALSE(o.flags.basic); + } +} + +struct SummarizeConsumer { + std::string* out; + explicit SummarizeConsumer(std::string* out) : out(out) {} + + bool Append(string_view s) { + *out += "[" + std::string(s) + "]"; + return true; + } + + bool ConvertOne(const UnboundConversion& conv, string_view s) { + *out += "{"; + *out += std::string(s); + *out += ":"; + *out += std::to_string(conv.arg_position) + "$"; + if (conv.width.is_from_arg()) { + *out += std::to_string(conv.width.get_from_arg()) + "$*"; + } + if (conv.precision.is_from_arg()) { + *out += "." + std::to_string(conv.precision.get_from_arg()) + "$*"; + } + *out += conv.conv.Char(); + *out += "}"; + return true; + } +}; + +std::string SummarizeParsedFormat(const ParsedFormatBase& pc) { + std::string out; + if (!pc.ProcessFormat(SummarizeConsumer(&out))) out += "!"; + return out; +} + +class ParsedFormatTest : public testing::Test {}; + +TEST_F(ParsedFormatTest, ValueSemantics) { + ParsedFormatBase p1({}, true, {}); // empty format + EXPECT_EQ("", SummarizeParsedFormat(p1)); + + ParsedFormatBase p2 = p1; // copy construct (empty) + EXPECT_EQ(SummarizeParsedFormat(p1), SummarizeParsedFormat(p2)); + + p1 = ParsedFormatBase("hello%s", true, {Conv::s}); // move assign + EXPECT_EQ("[hello]{s:1$s}", SummarizeParsedFormat(p1)); + + ParsedFormatBase p3 = p1; // copy construct (nonempty) + EXPECT_EQ(SummarizeParsedFormat(p1), SummarizeParsedFormat(p3)); + + using std::swap; + swap(p1, p2); + EXPECT_EQ("", SummarizeParsedFormat(p1)); + EXPECT_EQ("[hello]{s:1$s}", SummarizeParsedFormat(p2)); + swap(p1, p2); // undo + + p2 = p1; // copy assign + EXPECT_EQ(SummarizeParsedFormat(p1), SummarizeParsedFormat(p2)); +} + +struct ExpectParse { + const char* in; + std::initializer_list conv_set; + const char* out; +}; + +TEST_F(ParsedFormatTest, Parsing) { + // Parse should be equivalent to that obtained by ConversionParseIterator. + // No need to retest the parsing edge cases here. + const ExpectParse kExpect[] = { + {"", {}, ""}, + {"ab", {}, "[ab]"}, + {"a%d", {Conv::d}, "[a]{d:1$d}"}, + {"a%+d", {Conv::d}, "[a]{+d:1$d}"}, + {"a% d", {Conv::d}, "[a]{ d:1$d}"}, + {"a%b %d", {}, "[a]!"}, // stop after error + }; + for (const auto& e : kExpect) { + SCOPED_TRACE(e.in); + EXPECT_EQ(e.out, + SummarizeParsedFormat(ParsedFormatBase(e.in, false, e.conv_set))); + } +} + +TEST_F(ParsedFormatTest, ParsingFlagOrder) { + const ExpectParse kExpect[] = { + {"a%+ 0d", {Conv::d}, "[a]{+ 0d:1$d}"}, + {"a%+0 d", {Conv::d}, "[a]{+0 d:1$d}"}, + {"a%0+ d", {Conv::d}, "[a]{0+ d:1$d}"}, + {"a% +0d", {Conv::d}, "[a]{ +0d:1$d}"}, + {"a%0 +d", {Conv::d}, "[a]{0 +d:1$d}"}, + {"a% 0+d", {Conv::d}, "[a]{ 0+d:1$d}"}, + {"a%+ 0+d", {Conv::d}, "[a]{+ 0+d:1$d}"}, + }; + for (const auto& e : kExpect) { + SCOPED_TRACE(e.in); + EXPECT_EQ(e.out, + SummarizeParsedFormat(ParsedFormatBase(e.in, false, e.conv_set))); + } +} + +} // namespace +} // namespace str_format_internal +} // inline namespace lts_2018_12_18 +} // namespace absl -- cgit v1.2.3