# test.govlab/patterns/core/validators/schema.validator.test.ts

> 22 lines of code and 0 definitions.

Tree: Codebase Testing
Language: typescript
Canonical: https://banes-lab.com/anatomy/testing#file-testing-test-govlab-patterns-core-validators-schema-validator-test-ts
Source text: https://banes-lab.com/source/testing/test.govlab/patterns/core/validators/schema.validator.test.ts.txt

Listed in [test.govlab/patterns/core/validators](https://banes-lab.com/api/source/testing/test.govlab/patterns/core/validators.md), after [test.govlab/patterns/core/validators/report.validator.test.ts](https://banes-lab.com/source/testing/test.govlab/patterns/core/validators/report.validator.test.ts.md).

## Contained in

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

## Source

```typescript
import { describe, expect, it } from "vitest";
import { validateMapping, validateRecord } from "@govlab/patterns/core/validators/schema.validator.ts";
import { DataLoadError } from "@govlab/patterns/core/classifiers/schema.classifier.ts";
import { detectSchema } from "@govlab/patterns/core/analyzers/schema.analyzer.ts";

const schema = detectSchema([{ color: "red" }]);

describe("validateRecord", () => {
    it("returns a record that matches the schema", () => {
        expect(validateRecord({ color: "blue" }, schema)).toStrictEqual({ color: "blue" });
    });

    it("refuses an unknown field, a wrong kind and a non-object record", () => {
        expect(() => validateRecord({ color: "red", extra: 1 }, schema)).toThrow(DataLoadError);
        expect(() => validateRecord({ color: [0, 1] }, schema)).toThrow(DataLoadError);
        expect(() => validateRecord("nope", schema)).toThrow(DataLoadError);
    });
});

describe("validateMapping", () => {
    it("refuses a mapping over a field the schema does not hold", () => {
        expect(() => {
            validateMapping(new Map([["missing", ["distribution"]]]), schema);
        }).toThrow(DataLoadError);
    });
});
```