# test.build/core/factories/reference.factory.test.ts

> 11 lines of code and 0 definitions.

Tree: Codebase Testing
Language: typescript
Canonical: https://banes-lab.com/anatomy/testing#file-testing-test-build-core-factories-reference-factory-test-ts
Source text: https://banes-lab.com/source/testing/test.build/core/factories/reference.factory.test.ts.txt

Listed in [test.build/core/factories](https://banes-lab.com/api/source/testing/test.build/core/factories.md), after [test.build/core/factories/certificate.factory.test.ts](https://banes-lab.com/source/testing/test.build/core/factories/certificate.factory.test.ts.md) and before [test.build/core/factories/server.factory.test.ts](https://banes-lab.com/source/testing/test.build/core/factories/server.factory.test.ts.md).

## Contained in

- [test.build/core/factories](https://banes-lab.com/anatomy/testing/folder-testing-test-build-core-factories.md)

## Source

```typescript
import { describe, expect, it } from "vitest";
import { relationOf, singleRelation } from "@banes-lab/build-scripts/core/factories/reference.factory.ts";

const EDGE = { label: "Loop", ref: "reasoning:loop" };

describe("relationOf and singleRelation", () => {
    it("build one relation from the edges given, and none from no edge", () => {
        expect(relationOf("requires", [EDGE])).toStrictEqual([{ edges: [EDGE], relation: "requires" }]);
        expect(relationOf("requires", [])).toStrictEqual([]);
        expect(singleRelation("contract", EDGE)).toStrictEqual([{ edges: [EDGE], relation: "contract" }]);
        expect(singleRelation("contract", null)).toStrictEqual([]);
    });
});
```