Abseil Common Libraries (C++) (grcp 依赖)
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151 lines
5.2 KiB
151 lines
5.2 KiB
7 years ago
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#include <string>
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#include "gmock/gmock.h"
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#include "gtest/gtest.h"
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#include "absl/strings/str_format.h"
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namespace absl {
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namespace str_format_internal {
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namespace {
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std::string ConvToString(Conv conv) {
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std::string out;
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#define CONV_SET_CASE(c) \
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if (Contains(conv, Conv::c)) out += #c;
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ABSL_CONVERSION_CHARS_EXPAND_(CONV_SET_CASE, )
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#undef CONV_SET_CASE
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if (Contains(conv, Conv::star)) out += "*";
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return out;
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}
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TEST(StrFormatChecker, ArgumentToConv) {
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Conv conv = ArgumentToConv<std::string>();
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EXPECT_EQ(ConvToString(conv), "s");
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conv = ArgumentToConv<const char*>();
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EXPECT_EQ(ConvToString(conv), "sp");
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conv = ArgumentToConv<double>();
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EXPECT_EQ(ConvToString(conv), "fFeEgGaA");
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conv = ArgumentToConv<int>();
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EXPECT_EQ(ConvToString(conv), "cdiouxXfFeEgGaA*");
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conv = ArgumentToConv<std::string*>();
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EXPECT_EQ(ConvToString(conv), "p");
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}
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#if ABSL_INTERNAL_ENABLE_FORMAT_CHECKER
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struct Case {
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bool result;
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const char* format;
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};
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template <typename... Args>
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constexpr Case ValidFormat(const char* format) {
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return {ValidFormatImpl<ArgumentToConv<Args>()...>(format), format};
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}
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TEST(StrFormatChecker, ValidFormat) {
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// We want to make sure these expressions are constexpr and they have the
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// expected value.
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// If they are not constexpr the attribute will just ignore them and not give
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// a compile time error.
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enum e {};
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enum class e2 {};
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constexpr Case trues[] = {
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ValidFormat<>("abc"), //
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ValidFormat<e>("%d"), //
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ValidFormat<e2>("%d"), //
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ValidFormat<int>("%% %d"), //
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ValidFormat<int>("%ld"), //
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ValidFormat<int>("%lld"), //
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ValidFormat<std::string>("%s"), //
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ValidFormat<std::string>("%10s"), //
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ValidFormat<int>("%.10x"), //
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ValidFormat<int, int>("%*.3x"), //
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ValidFormat<int>("%1.d"), //
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ValidFormat<int>("%.d"), //
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ValidFormat<int, double>("%d %g"), //
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ValidFormat<int, std::string>("%*s"), //
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ValidFormat<int, double>("%.*f"), //
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ValidFormat<void (*)(), volatile int*>("%p %p"), //
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ValidFormat<string_view, const char*, double, void*>(
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"string_view=%s const char*=%s double=%f void*=%p)"),
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ValidFormat<int>("%% %1$d"), //
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ValidFormat<int>("%1$ld"), //
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ValidFormat<int>("%1$lld"), //
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ValidFormat<std::string>("%1$s"), //
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ValidFormat<std::string>("%1$10s"), //
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ValidFormat<int>("%1$.10x"), //
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ValidFormat<int>("%1$*1$.*1$d"), //
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ValidFormat<int, int>("%1$*2$.3x"), //
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ValidFormat<int>("%1$1.d"), //
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ValidFormat<int>("%1$.d"), //
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ValidFormat<double, int>("%2$d %1$g"), //
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ValidFormat<int, std::string>("%2$*1$s"), //
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ValidFormat<int, double>("%2$.*1$f"), //
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ValidFormat<void*, string_view, const char*, double>(
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"string_view=%2$s const char*=%3$s double=%4$f void*=%1$p "
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"repeat=%3$s)")};
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for (Case c : trues) {
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EXPECT_TRUE(c.result) << c.format;
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}
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constexpr Case falses[] = {
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ValidFormat<int>(""), //
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ValidFormat<e>("%s"), //
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ValidFormat<e2>("%s"), //
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ValidFormat<>("%s"), //
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ValidFormat<>("%r"), //
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ValidFormat<int>("%s"), //
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ValidFormat<int>("%.1.d"), //
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ValidFormat<int>("%*1d"), //
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ValidFormat<int>("%1-d"), //
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ValidFormat<std::string, int>("%*s"), //
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ValidFormat<int>("%*d"), //
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ValidFormat<std::string>("%p"), //
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ValidFormat<int (*)(int)>("%d"), //
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ValidFormat<>("%3$d"), //
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ValidFormat<>("%1$r"), //
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ValidFormat<int>("%1$s"), //
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ValidFormat<int>("%1$.1.d"), //
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ValidFormat<int>("%1$*2$1d"), //
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ValidFormat<int>("%1$1-d"), //
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ValidFormat<std::string, int>("%2$*1$s"), //
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ValidFormat<std::string>("%1$p"),
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ValidFormat<int, int>("%d %2$d"), //
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};
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for (Case c : falses) {
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EXPECT_FALSE(c.result) << c.format;
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}
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}
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TEST(StrFormatChecker, LongFormat) {
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#define CHARS_X_40 "1234567890123456789012345678901234567890"
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#define CHARS_X_400 \
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CHARS_X_40 CHARS_X_40 CHARS_X_40 CHARS_X_40 CHARS_X_40 CHARS_X_40 CHARS_X_40 \
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CHARS_X_40 CHARS_X_40 CHARS_X_40
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#define CHARS_X_4000 \
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CHARS_X_400 CHARS_X_400 CHARS_X_400 CHARS_X_400 CHARS_X_400 CHARS_X_400 \
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CHARS_X_400 CHARS_X_400 CHARS_X_400 CHARS_X_400
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constexpr char long_format[] =
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CHARS_X_4000 "%d" CHARS_X_4000 "%s" CHARS_X_4000;
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constexpr bool is_valid = ValidFormat<int, std::string>(long_format).result;
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EXPECT_TRUE(is_valid);
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}
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#endif // ABSL_INTERNAL_ENABLE_FORMAT_CHECKER
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} // namespace
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} // namespace str_format_internal
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} // namespace absl
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