bun:test/consistent-test-filename

When some test files are named user.test.ts and others user.spec.ts, a glob or a search written for one name misses the other.

By default, any file that ends in .test or .spec plus .js, .jsx, .ts or .tsx counts as a test file, and it must use .test. Only files that import from "bun:test" are checked.

Configure#

Off by default. To turn it on:

bunfig.toml

[lint.rules]
"bun:test/consistent-test-filename" = "error" # or "warn"

Every option, set to its default. The ones that are commented out are unset by default.

bunfig.toml

[lint.rules]
"bun:test/consistent-test-filename" = ["error", {
  # pattern = <string>,
  # allTestPattern = <string>,
}]

Examples#

src/user.spec.ts1 problem

import { expect, test } from "bun:test";

test("has a name", () => {
  expect(loadUser().name).toBe("Ada");
});

src/user.test.tsNo problems

import { expect, test } from "bun:test";

test("has a name", () => {
  expect(loadUser().name).toBe("Ada");
});

Options#

Both options are regular expressions, written as strings and tested against the file's path. /pattern/ works too, but flags after the last slash are ignored.

Option	Default	What it does
`pattern`	`.*\.test\.[tj]sx?$`	The pattern a test file's path must match.
`allTestPattern`	`.*\.(test\|spec)\.[tj]sx?$`	Which files count as test files. Other files aren't checked.

bunfig.toml

[lint.rules]
"bun:test/consistent-test-filename" = ["error", { pattern = '.*\.spec\.ts$' }]

With that pattern, .test.ts is the name that gets reported:

src/user.test.tswith { "pattern": ".*\\.spec\\.ts$" }1 problem

import { test } from "bun:test";

test.todo("has a name");

With allTestPattern set to __tests__, every file with __tests__ in its path is a test file. This one is reported because it doesn't end in .test.ts:

__tests__/user.tswith { "allTestPattern": "__tests__" }1 problem

import { test } from "bun:test";

test.todo("has a name");