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// Formatting library for C++ - scanning API test
//
// Copyright (c) 2019 - present, Victor Zverovich
// All rights reserved.
//
// For the license information refer to format.h.
#include "scan.h"
#include <time.h>
#include <climits>
#include "gmock/gmock.h"
#include "gtest-extra.h"
TEST(scan_test, read_text) {
auto s = fmt::string_view("foo");
auto end = fmt::scan(s, "foo");
EXPECT_EQ(end, s.end());
EXPECT_THROW_MSG(fmt::scan("fob", "foo"), fmt::format_error, "invalid input");
}
TEST(scan_test, read_int) {
auto n = int();
fmt::scan("42", "{}", n);
EXPECT_EQ(n, 42);
fmt::scan("-42", "{}", n);
EXPECT_EQ(n, -42);
}
TEST(scan_test, read_longlong) {
long long n = 0;
fmt::scan("42", "{}", n);
EXPECT_EQ(n, 42);
fmt::scan("-42", "{}", n);
EXPECT_EQ(n, -42);
}
TEST(scan_test, read_uint) {
auto n = unsigned();
fmt::scan("42", "{}", n);
EXPECT_EQ(n, 42);
EXPECT_THROW_MSG(fmt::scan("-42", "{}", n), fmt::format_error,
"invalid input");
}
TEST(scan_test, read_ulonglong) {
unsigned long long n = 0;
fmt::scan("42", "{}", n);
EXPECT_EQ(n, 42);
EXPECT_THROW_MSG(fmt::scan("-42", "{}", n), fmt::format_error,
"invalid input");
}
TEST(scan_test, read_string) {
auto s = std::string();
fmt::scan("foo", "{}", s);
EXPECT_EQ(s, "foo");
}
TEST(scan_test, read_string_view) {
auto s = fmt::string_view();
fmt::scan("foo", "{}", s);
EXPECT_EQ(s, "foo");
}
#ifdef FMT_HAVE_STRPTIME
namespace fmt {
template <> struct scanner<tm> {
std::string format;
scan_parse_context::iterator parse(scan_parse_context& ctx) {
auto it = ctx.begin();
if (it != ctx.end() && *it == ':') ++it;
auto end = it;
while (end != ctx.end() && *end != '}') ++end;
format.reserve(detail::to_unsigned(end - it + 1));
format.append(it, end);
format.push_back('\0');
return end;
}
template <class ScanContext>
typename ScanContext::iterator scan(tm& t, ScanContext& ctx) {
auto result = strptime(ctx.begin(), format.c_str(), &t);
if (!result) throw format_error("failed to parse time");
return result;
}
};
} // namespace fmt
TEST(scan_test, read_custom) {
auto input = "Date: 1985-10-25";
auto t = tm();
fmt::scan(input, "Date: {0:%Y-%m-%d}", t);
EXPECT_EQ(t.tm_year, 85);
EXPECT_EQ(t.tm_mon, 9);
EXPECT_EQ(t.tm_mday, 25);
}
#endif
TEST(scan_test, invalid_format) {
EXPECT_THROW_MSG(fmt::scan("", "{}"), fmt::format_error,
"argument index out of range");
EXPECT_THROW_MSG(fmt::scan("", "{"), fmt::format_error,
"invalid format string");
}
TEST(scan_test, example) {
auto key = std::string();
auto value = int();
fmt::scan("answer = 42", "{} = {}", key, value);
EXPECT_EQ(key, "answer");
EXPECT_EQ(value, 42);
}
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