EXPECT_VFPRINTF
CASE_TEST(empty); EXPECT_VFPRINTF(0, "", ""); break;
CASE_TEST(simple); EXPECT_VFPRINTF(3, "foo", "foo"); break;
CASE_TEST(string); EXPECT_VFPRINTF(3, "foo", "%s", "foo"); break;
CASE_TEST(number); EXPECT_VFPRINTF(4, "1234", "%d", 1234); break;
CASE_TEST(negnumber); EXPECT_VFPRINTF(5, "-1234", "%d", -1234); break;
CASE_TEST(unsigned); EXPECT_VFPRINTF(5, "12345", "%u", 12345); break;
CASE_TEST(char); EXPECT_VFPRINTF(1, "c", "%c", 'c'); break;
CASE_TEST(hex); EXPECT_VFPRINTF(1, "f", "%x", 0xf); break;
CASE_TEST(pointer); EXPECT_VFPRINTF(3, "0x1", "%p", (void *) 0x1); break;
CASE_TEST(uintmax_t); EXPECT_VFPRINTF(20, "18446744073709551615", "%ju", 0xffffffffffffffffULL); break;
CASE_TEST(intmax_t); EXPECT_VFPRINTF(20, "-9223372036854775807", "%jd", 0x8000000000000001LL); break;
CASE_TEST(truncation); EXPECT_VFPRINTF(25, "01234567890123456789", "%s", "0123456789012345678901234"); break;
CASE_TEST(string_width); EXPECT_VFPRINTF(10, " 1", "%10s", "1"); break;
CASE_TEST(number_width); EXPECT_VFPRINTF(10, " 1", "%10d", 1); break;
CASE_TEST(width_trunc); EXPECT_VFPRINTF(25, " ", "%25d", 1); break;