# test.govlab/stats/core/predicates/rule.predicate.test.ts

> 12 lines of code and 0 definitions.

Tree: Codebase Testing
Language: typescript
Canonical: https://banes-lab.com/anatomy/testing#file-testing-test-govlab-stats-core-predicates-rule-predicate-test-ts
Source text: https://banes-lab.com/source/testing/test.govlab/stats/core/predicates/rule.predicate.test.ts.txt

Listed in [test.govlab/stats/core/predicates](https://banes-lab.com/api/source/testing/test.govlab/stats/core/predicates.md), after [test.govlab/stats/core/predicates/record.predicate.test.ts](https://banes-lab.com/source/testing/test.govlab/stats/core/predicates/record.predicate.test.ts.md) and before [test.govlab/stats/core/predicates/source.predicate.test.ts](https://banes-lab.com/source/testing/test.govlab/stats/core/predicates/source.predicate.test.ts.md).

## Contained in

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

## Source

```typescript
import { describe, expect, it } from "vitest";
import { OFF_SEVERITY } from "@govlab/stats/configuration/constants/rule.constants.ts";
import { isOff } from "@govlab/stats/core/predicates/rule.predicate.ts";

describe("isOff", () => {
    it("reads a rule as off from null, false, the off word, zero or an off tuple", () => {
        for (const value of [null, false, OFF_SEVERITY, 0, [OFF_SEVERITY, {}]]) {
            expect(isOff(value)).toBe(true);
        }
        expect(isOff("error")).toBe(false);
        expect(isOff(["error", {}])).toBe(false);
    });
});
```