# test.govlab/quality/core/comparators/text.comparator.test.ts

> 19 lines of code and 0 definitions.

Tree: Codebase Testing
Language: typescript
Canonical: https://banes-lab.com/anatomy/testing#file-testing-test-govlab-quality-core-comparators-text-comparator-test-ts
Source text: https://banes-lab.com/source/testing/test.govlab/quality/core/comparators/text.comparator.test.ts.txt

Listed in [test.govlab/quality/core/comparators](https://banes-lab.com/api/source/testing/test.govlab/quality/core/comparators.md), after [test.govlab/quality/core/comparators/rule.comparator.test.ts](https://banes-lab.com/source/testing/test.govlab/quality/core/comparators/rule.comparator.test.ts.md).

## Contained in

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

## Source

```typescript
import { expect, test } from "vitest";
import { compareText } from "@govlab/quality/core/comparators/text.comparator.ts";

test("compareText orders by code point, so upper case sorts before lower case", () => {
    expect(compareText("A", "a")).toBeLessThan(0);
    expect(compareText("a", "A")).toBeGreaterThan(0);
    expect(compareText("a", "b")).toBeLessThan(0);
});

test("compareText reports equality as zero and a prefix as shorter", () => {
    expect(compareText("same", "same")).toBe(0);
    expect(compareText("", "")).toBe(0);
    expect(compareText("sort", "sorted")).toBeLessThan(0);
    expect(compareText("sorted", "sort")).toBeGreaterThan(0);
});

test("compareText sorts a list the same way the plain comparison operator would", () => {
    const names = ["Zeta", "alpha", "Beta", "_underscore", "beta2", "beta10"];
    const byCompare = [...names].sort(compareText);
    const byOperator = [...names].sort((a, b) => (a === b ? 0 : (a > b ? 1 : -1)));
    expect(byCompare).toStrictEqual(byOperator);
});
```