Checks¶

assertk-lint ships 14 issues across 11 detectors. All detectors run only against Kotlin test sources.

Errors¶

These are the only checks that fire as Severity.ERROR. They flag patterns where the surrounding test will silently pass even though it shouldn't.

Issue ID	What it flags	Quick fix
`UnusedAssertkAssertion`	An `assertThat(...)` chain that never has an assertion called on it	Partial — for null/equality/`is`-check subjects
`AssertThatEqualsUsage`	`equals()` called on an `assertk.Assert` receiver (returns a `Boolean`, never asserts)	Yes

Issue ID	What it flags	Quick fix
`TestFrameworkAssertionUse`	JUnit 4 / JUnit 5 / `kotlin.test` assertion calls	JUnit 4 + `kotlin.test`
`KotlinAssertionUse`	`kotlin.assert(...)` in tests	Yes
`NullComparisonAssertion`	`assertThat(x == null)` / `assertThat(x != null)`	Yes
`EqualityComparisonAssertion`	`assertThat(a == b)` / `assertThat(a != b)`	Yes
`CollectionSizeAssertion`	`assertThat(list.size).isEqualTo(n)` — use `hasSize(n)`	Yes
`UseIndexAssertion`	`assertThat(list[i])` — use `assertThat(list).index(i)`	Yes
`MapValueAssertion`	`assertThat(map[k])` — use `assertThat(map).key(k)`	Yes
`KeySetPresentAssertion`	`assertThat(map.keys).contains(k)` — use `key(k)`	Yes
`KeySetAbsentAssertion`	`assertThat(map.keys).doesNotContain(k)` — use `doesNotContainKey(k)`	Yes
`TryCatchAssertion`	A `try { ... } catch { assertThat(e)... }` block whose only purpose is exception assertion — use `assertFailure`	No

Off by default; turn them on in lint.xml (see Configuration) when your project is committed to a single assertion library.

Issue ID	What it flags	Quick fix
`AssertJUse`	AssertJ assertion calls in Kotlin tests	No
`GoogleTruthUse`	Google Truth assertion calls in Kotlin tests	No

Every check page lists:

Issue ID — the stable identifier you'd put in lint.xml, @SuppressLint(...), or the IDE.
Severity / Category / Default — from the detector's Issue.create(...).
Why — the rationale and the assertk equivalent.
Example — tabs showing the flagged code and the preferred form.
Quick fix — whether the IDE can mechanically rewrite for you.
Source — a link to the detector implementation on GitHub.