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Diffstat (limited to 'absl/strings/internal/str_format/checker_test.cc')
| -rw-r--r-- | absl/strings/internal/str_format/checker_test.cc | 152 |
1 files changed, 152 insertions, 0 deletions
diff --git a/absl/strings/internal/str_format/checker_test.cc b/absl/strings/internal/str_format/checker_test.cc new file mode 100644 index 00000000..b4f38979 --- /dev/null +++ b/absl/strings/internal/str_format/checker_test.cc @@ -0,0 +1,152 @@ +#include <string> + +#include "gmock/gmock.h" +#include "gtest/gtest.h" +#include "absl/strings/str_format.h" + +namespace absl { +inline namespace lts_2018_12_18 { +namespace str_format_internal { +namespace { + +std::string ConvToString(Conv conv) { + std::string out; +#define CONV_SET_CASE(c) \ + if (Contains(conv, Conv::c)) out += #c; + ABSL_CONVERSION_CHARS_EXPAND_(CONV_SET_CASE, ) +#undef CONV_SET_CASE + if (Contains(conv, Conv::star)) out += "*"; + return out; +} + +TEST(StrFormatChecker, ArgumentToConv) { + Conv conv = ArgumentToConv<std::string>(); + EXPECT_EQ(ConvToString(conv), "s"); + + conv = ArgumentToConv<const char*>(); + EXPECT_EQ(ConvToString(conv), "sp"); + + conv = ArgumentToConv<double>(); + EXPECT_EQ(ConvToString(conv), "fFeEgGaA"); + + conv = ArgumentToConv<int>(); + EXPECT_EQ(ConvToString(conv), "cdiouxXfFeEgGaA*"); + + conv = ArgumentToConv<std::string*>(); + EXPECT_EQ(ConvToString(conv), "p"); +} + +#if ABSL_INTERNAL_ENABLE_FORMAT_CHECKER + +struct Case { + bool result; + const char* format; +}; + +template <typename... Args> +constexpr Case ValidFormat(const char* format) { + return {ValidFormatImpl<ArgumentToConv<Args>()...>(format), format}; +} + +TEST(StrFormatChecker, ValidFormat) { + // We want to make sure these expressions are constexpr and they have the + // expected value. + // If they are not constexpr the attribute will just ignore them and not give + // a compile time error. + enum e {}; + enum class e2 {}; + constexpr Case trues[] = { + ValidFormat<>("abc"), // + + ValidFormat<e>("%d"), // + ValidFormat<e2>("%d"), // + ValidFormat<int>("%% %d"), // + ValidFormat<int>("%ld"), // + ValidFormat<int>("%lld"), // + ValidFormat<std::string>("%s"), // + ValidFormat<std::string>("%10s"), // + ValidFormat<int>("%.10x"), // + ValidFormat<int, int>("%*.3x"), // + ValidFormat<int>("%1.d"), // + ValidFormat<int>("%.d"), // + ValidFormat<int, double>("%d %g"), // + ValidFormat<int, std::string>("%*s"), // + ValidFormat<int, double>("%.*f"), // + ValidFormat<void (*)(), volatile int*>("%p %p"), // + ValidFormat<string_view, const char*, double, void*>( + "string_view=%s const char*=%s double=%f void*=%p)"), + + ValidFormat<int>("%% %1$d"), // + ValidFormat<int>("%1$ld"), // + ValidFormat<int>("%1$lld"), // + ValidFormat<std::string>("%1$s"), // + ValidFormat<std::string>("%1$10s"), // + ValidFormat<int>("%1$.10x"), // + ValidFormat<int>("%1$*1$.*1$d"), // + ValidFormat<int, int>("%1$*2$.3x"), // + ValidFormat<int>("%1$1.d"), // + ValidFormat<int>("%1$.d"), // + ValidFormat<double, int>("%2$d %1$g"), // + ValidFormat<int, std::string>("%2$*1$s"), // + ValidFormat<int, double>("%2$.*1$f"), // + ValidFormat<void*, string_view, const char*, double>( + "string_view=%2$s const char*=%3$s double=%4$f void*=%1$p " + "repeat=%3$s)")}; + + for (Case c : trues) { + EXPECT_TRUE(c.result) << c.format; + } + + constexpr Case falses[] = { + ValidFormat<int>(""), // + + ValidFormat<e>("%s"), // + ValidFormat<e2>("%s"), // + ValidFormat<>("%s"), // + ValidFormat<>("%r"), // + ValidFormat<int>("%s"), // + ValidFormat<int>("%.1.d"), // + ValidFormat<int>("%*1d"), // + ValidFormat<int>("%1-d"), // + ValidFormat<std::string, int>("%*s"), // + ValidFormat<int>("%*d"), // + ValidFormat<std::string>("%p"), // + ValidFormat<int (*)(int)>("%d"), // + + ValidFormat<>("%3$d"), // + ValidFormat<>("%1$r"), // + ValidFormat<int>("%1$s"), // + ValidFormat<int>("%1$.1.d"), // + ValidFormat<int>("%1$*2$1d"), // + ValidFormat<int>("%1$1-d"), // + ValidFormat<std::string, int>("%2$*1$s"), // + ValidFormat<std::string>("%1$p"), + + ValidFormat<int, int>("%d %2$d"), // + }; + + for (Case c : falses) { + EXPECT_FALSE(c.result) << c.format; + } +} + +TEST(StrFormatChecker, LongFormat) { +#define CHARS_X_40 "1234567890123456789012345678901234567890" +#define CHARS_X_400 \ + CHARS_X_40 CHARS_X_40 CHARS_X_40 CHARS_X_40 CHARS_X_40 CHARS_X_40 CHARS_X_40 \ + CHARS_X_40 CHARS_X_40 CHARS_X_40 +#define CHARS_X_4000 \ + CHARS_X_400 CHARS_X_400 CHARS_X_400 CHARS_X_400 CHARS_X_400 CHARS_X_400 \ + CHARS_X_400 CHARS_X_400 CHARS_X_400 CHARS_X_400 + constexpr char long_format[] = + CHARS_X_4000 "%d" CHARS_X_4000 "%s" CHARS_X_4000; + constexpr bool is_valid = ValidFormat<int, std::string>(long_format).result; + EXPECT_TRUE(is_valid); +} + +#endif // ABSL_INTERNAL_ENABLE_FORMAT_CHECKER + +} // namespace +} // namespace str_format_internal +} // inline namespace lts_2018_12_18 +} // namespace absl |