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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.h"
#include "gtest-extra.h"
TEST(ScanTest, ReadText) {
fmt::string_view s = "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(ScanTest, ReadInt) {
int n = 0;
fmt::scan("42", "{}", n);
EXPECT_EQ(n, 42);
fmt::scan("-42", "{}", n);
EXPECT_EQ(n, -42);
}
TEST(ScanTest, ReadLongLong) {
long long n = 0;
fmt::scan("42", "{}", n);
EXPECT_EQ(n, 42);
fmt::scan("-42", "{}", n);
EXPECT_EQ(n, -42);
}
TEST(ScanTest, ReadUInt) {
unsigned n = 0;
fmt::scan("42", "{}", n);
EXPECT_EQ(n, 42);
EXPECT_THROW_MSG(fmt::scan("-42", "{}", n), fmt::format_error,
"invalid input");
}
TEST(ScanTest, ReadULongLong) {
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(ScanTest, ReadString) {
std::string s;
fmt::scan("foo", "{}", s);
EXPECT_EQ(s, "foo");
}
TEST(ScanTest, ReadStringView) {
fmt::string_view s;
fmt::scan("foo", "{}", s);
EXPECT_EQ(s, "foo");
}
#ifndef _WIN32
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(ScanTest, ReadCustom) {
const char* 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(ScanTest, InvalidFormat) {
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(ScanTest, Example) {
std::string key;
int value;
fmt::scan("answer = 42", "{} = {}", key, value);
EXPECT_EQ(key, "answer");
EXPECT_EQ(value, 42);
}
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