1 #include <stdio.h> 2 #include <wchar.h> 3 4 #include <minitest/minitest.h> 5 6 TEST(stdio,snprintf) { 7 char char_buff[32]; 8 size_t char_buff_len = sizeof(char_buff) / sizeof(char); 9 10 EXPECT_EQ(2, snprintf(char_buff, char_buff_len, "ab")); 11 EXPECT_EQ(5, snprintf(char_buff, char_buff_len, "%s", "abcde")); 12 static const char kString[] = "Hello, World"; 13 EXPECT_EQ(12, snprintf(char_buff, char_buff_len, "%s", kString)); 14 EXPECT_EQ(12, snprintf(char_buff, 13, "%s", kString)); 15 16 EXPECT_EQ(12, snprintf(char_buff, 12, "%s", kString)); 17 EXPECT_EQ(L'\0', char_buff[11]); 18 EXPECT_EQ(12, snprintf(char_buff, 1, "%s", kString)); 19 EXPECT_EQ(L'\0', char_buff[0]); 20 21 EXPECT_EQ(20, snprintf(char_buff, char_buff_len, "%a", 3.1415926535)); 22 EXPECT_STREQ("0x1.921fb54411744p+1", char_buff); 23 } 24 25 TEST(stdio,sscanf) { 26 double d; 27 float f; 28 29 EXPECT_EQ(1, sscanf("0x1p-2", "%a", &f)); 30 EXPECT_EQ(0.25f, f); 31 32 EXPECT_EQ(1, sscanf("0x1p-2", "%la", &d)); 33 EXPECT_EQ(0.25, f); 34 } 35 36 TEST(stdio,swprintf) { 37 wchar_t wide_buff[32]; 38 size_t wide_buff_len = sizeof(wide_buff) / sizeof(wchar_t); 39 EXPECT_EQ(2, swprintf(wide_buff, wide_buff_len, L"ab")); 40 EXPECT_EQ(5, swprintf(wide_buff, wide_buff_len, L"%s", "abcde")); 41 static const wchar_t kWideString[] = L"Hello\uff41 World"; 42 EXPECT_EQ(12, swprintf(wide_buff, wide_buff_len, L"%ls", kWideString)); 43 EXPECT_EQ(12, swprintf(wide_buff, 13, L"%ls", kWideString)); 44 45 // Unlike snprintf(), swprintf() returns -1 in case of truncation 46 // and doesn't necessarily zero-terminate the output! 47 EXPECT_EQ(-1, swprintf(wide_buff, 12, L"%ls", kWideString)); 48 EXPECT_EQ(-1, swprintf(wide_buff, 1, L"%ls", kWideString)); 49 } 50 51
