ASSERT_NULL(9)

✨ ASSERT_NULL(9) ✨

okay so real talk — this is a page from the Kernel API Manual, and it's a tiny one, but it's lowkey iconic 🎀 stay with me bestie, it's like four lines of substance and then a huge friend group in SEE ALSO.

---

💖 NAME 💖

ASSERT_NULL — that's it, that's the whole name section 💅 (the original didn't give it a tagline, so we're not inventing one, periodt).

---

🦋 SYNOPSIS 🦋

ASSERT_NULL (seen );

literally exactly that, spaces and all — I'm not touching it 🙈

---

🌸 ARGUMENTS 🌸

• seen — the measured value. that's the thing you're checking, bestie. that's the whole assignment 🫶

---

⭐ DESCRIPTION ⭐

here's the entire vibe, fr fr:

ASSERT_NULL(measured): NULL == measured

so like. you hand it a measured value and it asserts that NULL == measured — the check is that your value is NULL. that's it, that's the function 💀 simple, clean, main character energy.

---

🔥 SEE ALSO 🔥

okay this is the part where the group chat gets LONG — but I'm listing every single one because nobody gets left on read 😤:

Kernel file ./tools/testing/selftests/kselftest_harness.h example(9), TH_LOG(9), SKIP(9), TEST(9), TEST_SIGNAL(9), FIXTURE_DATA(9), FIXTURE(9), FIXTURE_SETUP(9), FIXTURE_TEARDOWN(9), FIXTURE_TEARDOWN_PARENT(9), FIXTURE_VARIANT(9), FIXTURE_VARIANT_ADD(9), TEST_F(9), TEST_HARNESS_MAIN(9), operators(9), ASSERT_EQ(9), ASSERT_NE(9), ASSERT_LT(9), ASSERT_LE(9), ASSERT_GT(9), ASSERT_GE(9), ASSERT_TRUE(9), ASSERT_FALSE(9), ASSERT_STREQ(9), ASSERT_STRNE(9), EXPECT_EQ(9), EXPECT_NE(9), EXPECT_LT(9), EXPECT_LE(9), EXPECT_GT(9), EXPECT_GE(9), EXPECT_NULL(9), EXPECT_TRUE(9), EXPECT_FALSE(9), EXPECT_STREQ(9), EXPECT_STRNE(9), XFAIL_ADD(9)

like I said. huge friend group. the ASSERT_* girlies, the EXPECT_* girlies, the whole FIXTURE_* clique, and XFAIL_ADD(9) showing up fashionably late 💅✨

ngl the whole harness family lives in ./tools/testing/selftests/kselftest_harness.h — go say hi 🧚

---

and that's the page!! mwah 💖 this one came from ./tools/testing/selftests, dated October 2026 — so like, mark your calendar bestie, slay 🎀🌈👑