1 /* 2 std::ostream support tests 3 4 Copyright (c) 2012-2016, Victor Zverovich 5 All rights reserved. 6 7 Redistribution and use in source and binary forms, with or without 8 modification, are permitted provided that the following conditions are met: 9 10 1. Redistributions of source code must retain the above copyright notice, this 11 list of conditions and the following disclaimer. 12 2. Redistributions in binary form must reproduce the above copyright notice, 13 this list of conditions and the following disclaimer in the documentation 14 and/or other materials provided with the distribution. 15 16 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND 17 ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 18 WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 19 DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR 20 ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 21 (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 22 LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 23 ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 25 SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 */ 27 28 #include "fmt/ostream.h" 29 30 #include <sstream> 31 #include "gmock/gmock.h" 32 #include "gtest-extra.h" 33 #include "util.h" 34 35 using fmt::format; 36 using fmt::FormatError; 37 38 std::ostream &operator<<(std::ostream &os, const Date &d) { 39 os << d.year() << '-' << d.month() << '-' << d.day(); 40 return os; 41 } 42 43 std::wostream &operator<<(std::wostream &os, const Date &d) { 44 os << d.year() << L'-' << d.month() << L'-' << d.day(); 45 return os; 46 } 47 48 enum TestEnum {}; 49 std::ostream &operator<<(std::ostream &os, TestEnum) { 50 return os << "TestEnum"; 51 } 52 53 enum TestEnum2 {A}; 54 55 TEST(OStreamTest, Enum) { 56 EXPECT_FALSE(fmt::internal::ConvertToInt<TestEnum>::value); 57 EXPECT_EQ("TestEnum", fmt::format("{}", TestEnum())); 58 EXPECT_EQ("0", fmt::format("{}", A)); 59 } 60 61 struct TestArgFormatter : fmt::BasicArgFormatter<TestArgFormatter, char> { 62 TestArgFormatter(fmt::BasicFormatter<char, TestArgFormatter> &f, 63 fmt::FormatSpec &s, const char *fmt) 64 : fmt::BasicArgFormatter<TestArgFormatter, char>(f, s, fmt) {} 65 }; 66 67 TEST(OStreamTest, CustomArg) { 68 fmt::MemoryWriter writer; 69 typedef fmt::BasicFormatter<char, TestArgFormatter> Formatter; 70 Formatter formatter(fmt::ArgList(), writer); 71 fmt::FormatSpec spec; 72 TestArgFormatter af(formatter, spec, "}"); 73 af.visit(fmt::internal::MakeArg<Formatter>(TestEnum())); 74 EXPECT_EQ("TestEnum", writer.str()); 75 } 76 77 TEST(OStreamTest, Format) { 78 EXPECT_EQ("a string", format("{0}", TestString("a string"))); 79 std::string s = format("The date is {0}", Date(2012, 12, 9)); 80 EXPECT_EQ("The date is 2012-12-9", s); 81 Date date(2012, 12, 9); 82 EXPECT_EQ(L"The date is 2012-12-9", 83 format(L"The date is {0}", Date(2012, 12, 9))); 84 } 85 86 TEST(OStreamTest, FormatSpecs) { 87 EXPECT_EQ("def ", format("{0:<5}", TestString("def"))); 88 EXPECT_EQ(" def", format("{0:>5}", TestString("def"))); 89 EXPECT_THROW_MSG(format("{0:=5}", TestString("def")), 90 FormatError, "format specifier '=' requires numeric argument"); 91 EXPECT_EQ(" def ", format("{0:^5}", TestString("def"))); 92 EXPECT_EQ("def**", format("{0:*<5}", TestString("def"))); 93 EXPECT_THROW_MSG(format("{0:+}", TestString()), 94 FormatError, "format specifier '+' requires numeric argument"); 95 EXPECT_THROW_MSG(format("{0:-}", TestString()), 96 FormatError, "format specifier '-' requires numeric argument"); 97 EXPECT_THROW_MSG(format("{0: }", TestString()), 98 FormatError, "format specifier ' ' requires numeric argument"); 99 EXPECT_THROW_MSG(format("{0:#}", TestString()), 100 FormatError, "format specifier '#' requires numeric argument"); 101 EXPECT_THROW_MSG(format("{0:05}", TestString()), 102 FormatError, "format specifier '0' requires numeric argument"); 103 EXPECT_EQ("test ", format("{0:13}", TestString("test"))); 104 EXPECT_EQ("test ", format("{0:{1}}", TestString("test"), 13)); 105 EXPECT_EQ("te", format("{0:.2}", TestString("test"))); 106 EXPECT_EQ("te", format("{0:.{1}}", TestString("test"), 2)); 107 } 108 109 struct EmptyTest {}; 110 std::ostream &operator<<(std::ostream &os, EmptyTest) { 111 return os << ""; 112 } 113 114 TEST(OStreamTest, EmptyCustomOutput) { 115 EXPECT_EQ("", fmt::format("{}", EmptyTest())); 116 } 117 118 TEST(OStreamTest, Print) { 119 std::ostringstream os; 120 fmt::print(os, "Don't {}!", "panic"); 121 EXPECT_EQ("Don't panic!", os.str()); 122 } 123 124 TEST(OStreamTest, WriteToOStream) { 125 std::ostringstream os; 126 fmt::MemoryWriter w; 127 w << "foo"; 128 fmt::internal::write(os, w); 129 EXPECT_EQ("foo", os.str()); 130 } 131 132 TEST(OStreamTest, WriteToOStreamMaxSize) { 133 std::size_t max_size = std::numeric_limits<std::size_t>::max(); 134 std::streamsize max_streamsize = std::numeric_limits<std::streamsize>::max(); 135 if (max_size <= fmt::internal::to_unsigned(max_streamsize)) 136 return; 137 138 class TestWriter : public fmt::BasicWriter<char> { 139 private: 140 struct TestBuffer : fmt::Buffer<char> { 141 explicit TestBuffer(std::size_t size) { size_ = size; } 142 void grow(std::size_t) {} 143 } buffer_; 144 public: 145 explicit TestWriter(std::size_t size) 146 : fmt::BasicWriter<char>(buffer_), buffer_(size) {} 147 } w(max_size); 148 149 struct MockStreamBuf : std::streambuf { 150 MOCK_METHOD2(xsputn, std::streamsize (const void *s, std::streamsize n)); 151 std::streamsize xsputn(const char *s, std::streamsize n) { 152 const void *v = s; 153 return xsputn(v, n); 154 } 155 } buffer; 156 157 struct TestOStream : std::ostream { 158 explicit TestOStream(MockStreamBuf &buffer) : std::ostream(&buffer) {} 159 } os(buffer); 160 161 testing::InSequence sequence; 162 const char *data = 0; 163 std::size_t size = max_size; 164 do { 165 typedef fmt::internal::MakeUnsigned<std::streamsize>::Type UStreamSize; 166 UStreamSize n = std::min<UStreamSize>( 167 size, fmt::internal::to_unsigned(max_streamsize)); 168 EXPECT_CALL(buffer, xsputn(data, static_cast<std::streamsize>(n))) 169 .WillOnce(testing::Return(max_streamsize)); 170 data += n; 171 size -= static_cast<std::size_t>(n); 172 } while (size != 0); 173 fmt::internal::write(os, w); 174 } 175
