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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 <thread>
#include "fmt/os.h"
#include "gmock/gmock.h"
#include "gtest-extra.h"
TEST(scan_test, read_text) {
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(scan_test, read_int) {
int n = 0;
fmt::scan("42", "{}", n);
EXPECT_EQ(n, 42);
fmt::scan("-42", "{}", n);
EXPECT_EQ(n, -42);
fmt::scan("42", "{:}", n);
EXPECT_EQ(n, 42);
EXPECT_THROW_MSG(fmt::scan(std::to_string(INT_MAX + 1u), "{}", n),
fmt::format_error, "number is too big");
}
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) {
unsigned 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_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_hex) {
unsigned n = 0;
fmt::scan("2a", "{:x}", n);
EXPECT_EQ(n, 42);
auto num_digits = std::numeric_limits<unsigned>::digits / 4;
EXPECT_THROW_MSG(fmt::scan(fmt::format("1{:0{}}", 0, num_digits), "{:x}", n),
fmt::format_error, "number is too big");
}
TEST(scan_test, read_string) {
std::string s;
fmt::scan("foo", "{}", s);
EXPECT_EQ(s, "foo");
}
TEST(scan_test, read_string_view) {
fmt::string_view s;
fmt::scan("foo", "{}", s);
EXPECT_EQ(s, "foo");
}
TEST(scan_test, separator) {
int n1 = 0, n2 = 0;
fmt::scan("10 20", "{} {}", n1, n2);
EXPECT_EQ(n1, 10);
EXPECT_EQ(n2, 20);
}
struct num {
int value;
};
namespace fmt {
template <> struct scanner<num> {
bool hex = false;
auto parse(scan_parse_context& ctx) -> scan_parse_context::iterator {
auto it = ctx.begin(), end = ctx.end();
if (it != end && *it == 'x') hex = true;
if (it != end && *it != '}') throw_format_error("invalid format");
return it;
}
template <class ScanContext>
auto scan(num& n, ScanContext& ctx) const -> typename ScanContext::iterator {
// TODO: handle specifier
return fmt::scan(ctx, "{}", n.value);
}
};
} // namespace fmt
TEST(scan_test, read_custom) {
auto input = "42";
auto n = num();
fmt::scan(input, "{:}", n);
EXPECT_EQ(n.value, 42);
}
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) {
std::string key;
int value = 0;
fmt::scan("answer = 42", "{} = {}", key, value);
EXPECT_EQ(key, "answer");
EXPECT_EQ(value, 42);
}
TEST(scan_test, end_of_input) {
int value = 0;
fmt::scan("", "{}", value);
}
#if FMT_USE_FCNTL
TEST(scan_test, file) {
fmt::file read_end, write_end;
fmt::file::pipe(read_end, write_end);
fmt::string_view input = "10 20";
write_end.write(input.data(), input.size());
write_end.close();
int n1 = 0, n2 = 0;
fmt::buffered_file f = read_end.fdopen("r");
fmt::scan(f.get(), "{} {}", n1, n2);
EXPECT_EQ(n1, 10);
EXPECT_EQ(n2, 20);
}
TEST(scan_test, lock) {
fmt::file read_end, write_end;
fmt::file::pipe(read_end, write_end);
std::thread producer([&]() {
fmt::string_view input = "42 ";
for (int i = 0; i < 1000; ++i) write_end.write(input.data(), input.size());
write_end.close();
});
std::atomic<int> count(0);
fmt::buffered_file f = read_end.fdopen("r");
auto fun = [&]() {
int value = 0;
while (fmt::scan(f.get(), "{}", value)) {
if (value != 42) {
read_end.close();
EXPECT_EQ(value, 42);
break;
}
++count;
}
};
std::thread consumer1(fun);
std::thread consumer2(fun);
producer.join();
consumer1.join();
consumer2.join();
EXPECT_EQ(count, 1000);
}
#endif // FMT_USE_FCNTL
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