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Explicitly test printf %s with nullptr. 

I haven't found a bug, but tests are good.

Bug: https://github.com/landley/toybox/issues/163
Change-Id: I57149800099abc699cc841b69a5a72aeac7c2bcc
This commit is contained in:
Elliott Hughes 2020-01-07 08:48:10 -08:00
parent 7bc71075ea
commit 5dc31300ff
1 changed files with 14 additions and 0 deletions
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14
tests/stdio_test.cpp
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@ -853,6 +853,20 @@ TEST(STDIO_TEST, snprintf_asterisk_overflow) {
ASSERT_EQ(ENOMEM, errno);
}
// Inspired by https://github.com/landley/toybox/issues/163.
TEST(STDIO_TEST, printf_NULL) {
char buf[128];
char* null = nullptr;
EXPECT_EQ(4, snprintf(buf, sizeof(buf), "<%*.*s>", 2, 2, null));
EXPECT_STREQ("<(n>", buf);
EXPECT_EQ(8, snprintf(buf, sizeof(buf), "<%*.*s>", 2, 8, null));
EXPECT_STREQ("<(null)>", buf);
EXPECT_EQ(10, snprintf(buf, sizeof(buf), "<%*.*s>", 8, 2, null));
EXPECT_STREQ("< (n>", buf);
EXPECT_EQ(10, snprintf(buf, sizeof(buf), "<%*.*s>", 8, 8, null));
EXPECT_STREQ("< (null)>", buf);
}
TEST(STDIO_TEST, fprintf) {
TemporaryFile tf;