1 // Formatting library for C++ - Grisu tests
2 //
3 // Copyright (c) 2012 - present, Victor Zverovich
4 // All rights reserved.
5 //
6 // For the license information refer to format.h.
7
8 #include "fmt/format.h"
9 #include "gtest.h"
10
11 static bool reported_skipped;
12
13 #undef TEST
14 #define TEST(test_fixture, test_name) \
15 void test_fixture##test_name(); \
16 GTEST_TEST(test_fixture, test_name) { \
17 if (FMT_USE_GRISU) { \
18 test_fixture##test_name(); \
19 } else if (!reported_skipped) { \
20 reported_skipped = true; \
21 fmt::print("Skipping Grisu tests.\n"); \
22 } \
23 } \
24 void test_fixture##test_name()
25
TEST(GrisuTest,NaN)26 TEST(GrisuTest, NaN) {
27 auto nan = std::numeric_limits<double>::quiet_NaN();
28 EXPECT_EQ("nan", fmt::format("{}", nan));
29 EXPECT_EQ("-nan", fmt::format("{}", -nan));
30 }
31
TEST(GrisuTest,Inf)32 TEST(GrisuTest, Inf) {
33 auto inf = std::numeric_limits<double>::infinity();
34 EXPECT_EQ("inf", fmt::format("{}", inf));
35 EXPECT_EQ("-inf", fmt::format("{}", -inf));
36 }
37
TEST(GrisuTest,Zero)38 TEST(GrisuTest, Zero) { EXPECT_EQ("0.0", fmt::format("{}", 0.0)); }
39
TEST(GrisuTest,Round)40 TEST(GrisuTest, Round) {
41 EXPECT_EQ("1.9156918820264798e-56",
42 fmt::format("{}", 1.9156918820264798e-56));
43 EXPECT_EQ("0.0000", fmt::format("{:.4f}", 7.2809479766055470e-15));
44 }
45
TEST(GrisuTest,Prettify)46 TEST(GrisuTest, Prettify) {
47 EXPECT_EQ("0.0001", fmt::format("{}", 1e-4));
48 EXPECT_EQ("1e-05", fmt::format("{}", 1e-5));
49 EXPECT_EQ("9.999e-05", fmt::format("{}", 9.999e-5));
50 EXPECT_EQ("10000000000.0", fmt::format("{}", 1e10));
51 EXPECT_EQ("100000000000.0", fmt::format("{}", 1e11));
52 EXPECT_EQ("12340000000.0", fmt::format("{}", 1234e7));
53 EXPECT_EQ("12.34", fmt::format("{}", 1234e-2));
54 EXPECT_EQ("0.001234", fmt::format("{}", 1234e-6));
55 EXPECT_EQ("0.1", fmt::format("{}", 0.1f));
56 EXPECT_EQ("0.10000000149011612", fmt::format("{}", double(0.1f)));
57 }
58
TEST(GrisuTest,ZeroPrecision)59 TEST(GrisuTest, ZeroPrecision) { EXPECT_EQ("1", fmt::format("{:.0}", 1.0)); }
60
TEST(GrisuTest,Fallback)61 TEST(GrisuTest, Fallback) {
62 EXPECT_EQ("1e+23", fmt::format("{}", 1e23));
63 EXPECT_EQ("9e-265", fmt::format("{}", 9e-265));
64 EXPECT_EQ("5.423717798060526e+125",
65 fmt::format("{}", 5.423717798060526e+125));
66 EXPECT_EQ("1.372371880954233e-288",
67 fmt::format("{}", 1.372371880954233e-288));
68 EXPECT_EQ("55388492.622190244", fmt::format("{}", 55388492.622190244));
69 EXPECT_EQ("2.2506787569811123e-253",
70 fmt::format("{}", 2.2506787569811123e-253));
71 EXPECT_EQ("1103618912042992.8", fmt::format("{}", 1103618912042992.8));
72 // pow(2, -25) - assymetric boundaries:
73 EXPECT_EQ("2.9802322387695312e-08",
74 fmt::format("{}", 2.9802322387695312e-08));
75 }
76