KUNIT_EXPECT_LT(9)

📦 version 7.3.1, in nixpkgs unstable

💅 KUNIT_EXPECT_LT — bestie's guide to "is the left one smaller??" ✨

okay so this is a page from the Kernel API Manual (like, the kernel's own little manual shelf 📚) and the star of the show is KUNIT_EXPECT_LT. no cap, it's a whole vibe.

🎀 NAME 🎀

KUNIT_EXPECT_LT — an expectation that @left is less than @right. literally that's it, that's the whole job 💖

✨ SYNOPSIS ✨

KUNIT_EXPECT_LT (test , left , right );

look at her go 🫶 three little args, one big opinion about which number is smaller.

🧚 ARGUMENTS 🧚

  • test — the test context object. like, the group chat this expectation is being announced in 💬
  • left — an arbitrary expression that evaluates to a primitive C type. yes bestie, arbitrary — go feral, but it's gotta be a primitive C type 👑
  • right — an arbitrary expression that evaluates to a primitive C type. same deal, other side of the comparison 🌸

💫 DESCRIPTION 💫

so what it actually does: it sets an expectation that the value left evaluates to is less than the value right evaluates to. tiny, simple, iconic. 🦋

and here's the tea — this is semantically equivalent to KUNIT_EXPECT_TRUE(test, (left) < (right)). like, that's not me being shady, that's literally what the page says. fr fr 💀

so if you wanna understand the deep lore of how this expectation behaves, go read KUNIT_EXPECT_TRUE — it's got more information for you, iykyk 👀

🌈 SEE ALSO 🌈

Kernel file ./include/kunit/test.h — the source of truth, the mothership, the main character 💅

and now the whole friend group, alphabetically-ish, in no particular order because chaos is a lifestyle:

like, everyone showed up to the party 🎉 no gatekeeping here.

lowkey important: left and right are expressions, not values, so they get dropped into the comparison as written. don't be weird about it and you're golden 💜

and that's the page!! sign-off time 🎀 this one lives in ./include/kunit (the source), stamped October 2026 in the version/date corner, and honestly? she ate. periodt. 💅🔥

📦 where this page comes from