# test.web/core/predicates/surface.predicate.test.ts

> 14 lines of code and 0 definitions.

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

Listed in [test.web/core/predicates](https://banes-lab.com/api/source/testing/test.web/core/predicates.md), after [test.web/core/predicates/resource.predicate.test.ts](https://banes-lab.com/source/testing/test.web/core/predicates/resource.predicate.test.ts.md).

## Contained in

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

## Source

```typescript
import { describe, expect, it } from "vitest";
import { isRecording } from "@banes-lab/web/core/predicates/surface.predicate.ts";

const FRAME = { command: "npm run await", lines: [{ changed: true, text: "+ A-1" }], output: "", surface: "venue.md" };

describe("isRecording", () => {
    it("accepts a figure with an opening and at least one well-formed frame", () => {
        expect(isRecording({ figure: "venue", frames: [FRAME], inputs: "", opening: ["line"] })).toBe(true);
    });

    it("refuses a recording with no frames, a malformed frame or no opening", () => {
        expect(isRecording({ figure: "venue", frames: [], opening: [] })).toBe(false);
        expect(isRecording({ figure: "venue", frames: [{ ...FRAME, lines: [{ text: 1 }] }], opening: [] })).toBe(false);
        expect(isRecording({ figure: "venue", frames: [FRAME] })).toBe(false);
        expect(isRecording(null)).toBe(false);
    });
});
```