1 // Formatting library for C++ - scanning API test
2 //
3 // Copyright (c) 2019 - present, Victor Zverovich
4 // All rights reserved.
5 //
6 // For the license information refer to format.h.
7
8 #include <time.h>
9 #include <climits>
10
11 #include "gmock.h"
12 #include "gtest-extra.h"
13 #include "scan.h"
14
TEST(ScanTest,ReadText)15 TEST(ScanTest, ReadText) {
16 fmt::string_view s = "foo";
17 auto end = fmt::scan(s, "foo");
18 EXPECT_EQ(end, s.end());
19 EXPECT_THROW_MSG(fmt::scan("fob", "foo"), fmt::format_error, "invalid input");
20 }
21
TEST(ScanTest,ReadInt)22 TEST(ScanTest, ReadInt) {
23 int n = 0;
24 fmt::scan("42", "{}", n);
25 EXPECT_EQ(n, 42);
26 fmt::scan("-42", "{}", n);
27 EXPECT_EQ(n, -42);
28 }
29
TEST(ScanTest,ReadLongLong)30 TEST(ScanTest, ReadLongLong) {
31 long long n = 0;
32 fmt::scan("42", "{}", n);
33 EXPECT_EQ(n, 42);
34 fmt::scan("-42", "{}", n);
35 EXPECT_EQ(n, -42);
36 }
37
TEST(ScanTest,ReadUInt)38 TEST(ScanTest, ReadUInt) {
39 unsigned n = 0;
40 fmt::scan("42", "{}", n);
41 EXPECT_EQ(n, 42);
42 EXPECT_THROW_MSG(fmt::scan("-42", "{}", n), fmt::format_error,
43 "invalid input");
44 }
45
TEST(ScanTest,ReadULongLong)46 TEST(ScanTest, ReadULongLong) {
47 unsigned long long n = 0;
48 fmt::scan("42", "{}", n);
49 EXPECT_EQ(n, 42);
50 EXPECT_THROW_MSG(fmt::scan("-42", "{}", n), fmt::format_error,
51 "invalid input");
52 }
53
TEST(ScanTest,ReadString)54 TEST(ScanTest, ReadString) {
55 std::string s;
56 fmt::scan("foo", "{}", s);
57 EXPECT_EQ(s, "foo");
58 }
59
TEST(ScanTest,ReadStringView)60 TEST(ScanTest, ReadStringView) {
61 fmt::string_view s;
62 fmt::scan("foo", "{}", s);
63 EXPECT_EQ(s, "foo");
64 }
65
66 #ifndef _WIN32
67 namespace fmt {
68 template <> struct scanner<tm> {
69 std::string format;
70
parsefmt::scanner71 scan_parse_context::iterator parse(scan_parse_context& ctx) {
72 auto it = ctx.begin();
73 if (it != ctx.end() && *it == ':') ++it;
74 auto end = it;
75 while (end != ctx.end() && *end != '}') ++end;
76 format.reserve(internal::to_unsigned(end - it + 1));
77 format.append(it, end);
78 format.push_back('\0');
79 return end;
80 }
81
82 template <class ScanContext>
scanfmt::scanner83 typename ScanContext::iterator scan(tm& t, ScanContext& ctx) {
84 auto result = strptime(ctx.begin(), format.c_str(), &t);
85 if (!result) throw format_error("failed to parse time");
86 return result;
87 }
88 };
89 } // namespace fmt
90
TEST(ScanTest,ReadCustom)91 TEST(ScanTest, ReadCustom) {
92 const char* input = "Date: 1985-10-25";
93 auto t = tm();
94 fmt::scan(input, "Date: {0:%Y-%m-%d}", t);
95 EXPECT_EQ(t.tm_year, 85);
96 EXPECT_EQ(t.tm_mon, 9);
97 EXPECT_EQ(t.tm_mday, 25);
98 }
99 #endif
100
TEST(ScanTest,InvalidFormat)101 TEST(ScanTest, InvalidFormat) {
102 EXPECT_THROW_MSG(fmt::scan("", "{}"), fmt::format_error,
103 "argument index out of range");
104 EXPECT_THROW_MSG(fmt::scan("", "{"), fmt::format_error,
105 "invalid format string");
106 }
107
TEST(ScanTest,Example)108 TEST(ScanTest, Example) {
109 std::string key;
110 int value;
111 fmt::scan("answer = 42", "{} = {}", key, value);
112 EXPECT_EQ(key, "answer");
113 EXPECT_EQ(value, 42);
114 }
115