# test.govlab/quality/core/selectors/emitter.selector.test.ts

> 9 lines of code and 0 definitions.

Tree: Codebase Testing
Language: typescript
Canonical: https://banes-lab.com/anatomy/testing#file-testing-test-govlab-quality-core-selectors-emitter-selector-test-ts
Source text: https://banes-lab.com/source/testing/test.govlab/quality/core/selectors/emitter.selector.test.ts.txt

Listed in [test.govlab/quality/core/selectors](https://banes-lab.com/api/source/testing/test.govlab/quality/core/selectors.md), after [test.govlab/quality/core/selectors/context.fragment.selector.test.ts](https://banes-lab.com/source/testing/test.govlab/quality/core/selectors/context.fragment.selector.test.ts.md) and before [test.govlab/quality/core/selectors/eslint.selector.test.ts](https://banes-lab.com/source/testing/test.govlab/quality/core/selectors/eslint.selector.test.ts.md).

## Contained in

- [test.govlab/quality/core/selectors](https://banes-lab.com/anatomy/testing/folder-testing-test-govlab-quality-core-selectors.md)

## Source

```typescript
import { expect, test } from "vitest";
import { ruleIdsFor, toolTokensOf } from "@govlab/quality/core/selectors/emitter.selector.ts";

const TOKENS = { ruff: { "line-length": { knob: "line-length", ruleIds: ["E501"] } } };

test("toolTokensOf answers a tool's tokens, and ruleIdsFor the rules one concept maps to", () => {
    const ruff = toolTokensOf(TOKENS, "ruff");
    expect(ruleIdsFor(ruff, "line-length")).toStrictEqual(["E501"]);
    expect(ruleIdsFor(ruff, "absent")).toStrictEqual([]);
    expect(toolTokensOf(TOKENS, "absent")).toStrictEqual({});
});
```