EXPECT_LT(9)

🌸 EXPECT_LT(9) — the "is it actually smaller tho" check 🌸

okay so real talk, this one lives in the Kernel API Manual and it's one of the kselftest harness assertion macros. bestie, it's giving "tiny but mighty" and i'm obsessed 💅

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✨ NAME ✨

EXPECT_LT —

that's it. that's the whole name section. no description, no follow-up, no nothing. she said "my name is enough" and honestly? main character energy 👑 like, the confidence. we love to see it.

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🫶 SYNOPSIS 🫶

EXPECT_LT (expected , seen );

(yes the spacing is like that, don't @ me, that's literally how it's written, copy it exactly bestie 💖)

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🎀 ARGUMENTS 🎀

• expected — the value you expect to see. your hopes, your dreams, your predictions 🌈
• seen — the value you actually measured. the reality check. the "well, we ran it" 💀

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🔥 DESCRIPTION 🔥

okay so here's the whole entire deal, and it's literally one line:

EXPECT_LT(expected, measured): expected < measured

so it's checking that expected is less than measured. that's the vibe check. expected < measured, and if that's true you slay, and if it's not... well, it's an EXPECT, not an ASSERT, iykyk 😌 (EXPECT macros keep going after a failure, unlike the ASSERT family — but hey, that's a whole other manpage, go read ASSERT_LT(9) if you want the strict one).

it's fr fr just the < operator in a little fancy harness outfit. iconic. periodt. 🦋

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👑 SEE ALSO 👑

the whole squad, assembled. all of these are literally listed, so here they are, all of them, no skipping, no cap:

• 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_NULL(9)
• ASSERT_TRUE(9)
• ASSERT_FALSE(9)
• ASSERT_STREQ(9)
• ASSERT_STRNE(9)
• EXPECT_EQ(9)
• EXPECT_NE(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, that's the entire friend group. go read them, they're all bangers 🍓

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heads up bestie: this page is source-ified from the actual kselftest harness docs, so if anything looks weirdly terse, that's just how the kernel rolls. it's not you, it's the manpage 💜

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and that's the page!! mwah 💋 sign-off time: this lil cutie came out of ./tools/testing/selftests and it's dated October 2026, manual section EXPECT_LT(9) — go forth and compare things, you're gonna do amazing 🧚✨