STRUCT KUNIT_ASSERT(9)

💅 struct kunit_assert(9) 💅

okay bestie, welcome to the Kernel API Manual ✨ — yes, the manual name is literally in the title, we're doing this properly. this page is about struct kunit_assert, section 9, and it's short but it's important, so pay attention 🫶

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✨ NAME ✨

struct kunit_assert — the data you need for printing a failed assertion or expectation. that's it. that's the whole job. it's giving "backstage pass for when your test goes 💀" 😭

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🌸 SYNOPSIS 🌸

struct kunit_assert {
};

ok so before you come for me — yes, the struct is empty. literally { };. nothing inside. no cap. that's exactly how it's written in the header, so that's how i'm writing it. don't @ me 💅

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🎀 Members 🎀

bestie. there are no members listed. the braces are wide open and nobody's home 🙈. i'm not inventing any, that's not the vibe, we don't make things up in this group chat.

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🦋 Description 🦋

so what is it then? struct kunit_assert represents a failed expectation / assertion. that's its whole personality ✨.

it contains all the data necessary to format a string to a user reporting the failure — like, every detail you'd need to tell a human "hey, this test did not slay, here's why" 😭👑

it's the main character of failure reporting. iconic behaviour honestly. it doesn't do the failing, it just holds all the receipts for when something else does 🔥

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💜 SEE ALSO 💜

go look at these, they're the whole friend group fr fr 🫶:

• Kernel file ./include/kunit/assert.h
• enum kunit_assert_type(9)
• struct kunit_loc(9)
• struct kunit_fail_assert(9)
• struct kunit_unary_assert(9)
• struct kunit_ptr_not_err_assert(9)
• struct kunit_binary_assert_text(9)
• struct kunit_binary_assert(9)
• struct kunit_binary_ptr_assert(9)
• struct kunit_binary_str_assert(9)
• struct kunit_mem_assert(9)

ngl the empty struct makes way more sense once you clock that all these other structs are the ones actually carrying the payload 🧚 read them. iykyk.

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⭐ that's the page!! sourced from ./include/kunit, dated October 2026, and filed under struct kunit_assert(9) — stan a well-documented failure path, periodt 💖🌈