# test.govlab/quality/core/registries/producer.registry.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-quality-core-registries-producer-registry-test-ts
Source text: https://banes-lab.com/source/testing/test.govlab/quality/core/registries/producer.registry.test.ts.txt

Listed in [test.govlab/quality/core/registries](https://banes-lab.com/api/source/testing/test.govlab/quality/core/registries.md), after [test.govlab/quality/core/registries/formatter.registry.test.ts](https://banes-lab.com/source/testing/test.govlab/quality/core/registries/formatter.registry.test.ts.md) and before [test.govlab/quality/core/registries/section.registry.test.ts](https://banes-lab.com/source/testing/test.govlab/quality/core/registries/section.registry.test.ts.md).

## Contained in

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

## Source

```typescript
import { defineProducer, registeredProducers } from "@govlab/quality/core/registries/producer.registry.ts";
import { expect, test } from "vitest";

const produce = async (): Promise<[]> => {
    await Promise.resolve();
    return [];
};

test("defineProducer registers each producer once, and registeredProducers lists them by name", () => {
    defineProducer({ name: "zeta", produce, refresh: "manual" });
    defineProducer({ name: "alpha", produce, refresh: "build" });
    expect(registeredProducers().map((producer) => producer.name)).toStrictEqual(["alpha", "zeta"]);
    expect(() => defineProducer({ name: "alpha", produce, refresh: "build" })).toThrow('"alpha"');
});
```