oxc-project/oxc · error · OxcDiagnostic

`{fn_kind}` can not be used with `.{method_used}` to create

Error message

`{fn_kind}` can not be used with `.{method_used}` to create parameterized test.

What it means

Emitted by the vitest/consistent-each-for rule when a `.each`-style parameterized test function (e.g. `test.each`) is combined with the mismatched `.for` accessor (or vice versa). It fires at the call span because vitest requires the matching pairing (`it.each` with `.each`, `test.for` with `.for`) and mixing them is a mistake.

Source

Thrown at crates/oxc_linter/src/rules/vitest/consistent_each_for.rs:28

use crate::{
    context::LintContext,
    rule::{DefaultRuleConfig, Rule},
    utils::{JestFnKind, JestGeneralFnKind, PossibleJestNode, parse_general_jest_fn_call},
};

fn consistent_each_for_diagnostic(
    span: Span,
    fn_kind: &str,
    method_used: &str,
    method_name: &CompactStr,
) -> OxcDiagnostic {
    let message =
        format!("`{fn_kind}` can not be used with `.{method_used}` to create parameterized test.");
    let help = format!(
        "To create parameterized test with `{fn_kind}` function you should use `{method_name}`"
    );

    OxcDiagnostic::warn(message).with_help(help).with_label(span)
}

#[derive(Debug, Default, Clone)]
pub struct ConsistentEachFor(Box<ConsistentEachForConfig>);

impl std::ops::Deref for ConsistentEachFor {
    type Target = ConsistentEachForConfig;

    fn deref(&self) -> &Self::Target {
        &self.0
    }
}

#[derive(Debug, Clone, PartialEq, Eq, JsonSchema, Deserialize)]
#[serde(rename_all = "lowercase")]
pub enum MemberNames {
    /// Prefer using `.for` to create parameterized tests.
    For,

View on GitHub (pinned to e1e7af627c)

Solutions

1. Use the matching method name suggested in the help, e.g. replace `test.each` with `test.for`
2. Keep `fn_kind` and the accessor consistent across the test file

When it happens

Trigger: Thrown at crates/oxc_linter/src/rules/vitest/consistent_each_for.rs:28 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of oxc-project/oxc@e1e7af627c (2026-08-20). Data as JSON: /api/errors/85de36bffd6b0c2d. Report an issue: GitHub.