SnowLuma/packages/common/tests/env.test.ts

import { describe, expect, it } from 'vitest';
import { positiveIntEnv } from '../src/env';

describe('positiveIntEnv', () => {
    it('returns the fallback when the variable is absent or blank', () => {
        expect(positiveIntEnv('SNOWLUMA_TEST_INT', 15, { env: {} })).toBe(15);
        expect(positiveIntEnv('SNOWLUMA_TEST_INT', 15, { env: { SNOWLUMA_TEST_INT: '  ' } })).toBe(
            15,
        );
    });

    it('reads a positive integer and honors the max', () => {
        expect(
            positiveIntEnv('SNOWLUMA_TEST_INT', 15, { env: { SNOWLUMA_TEST_INT: '2500' } }),
        ).toBe(2500);
        expect(
            positiveIntEnv('SNOWLUMA_TEST_INT', 15, {
                max: 65535,
                env: { SNOWLUMA_TEST_INT: '80' },
            }),
        ).toBe(80);
    });

    it('ignores zero, negatives, fractions, and values above the max', () => {
        for (const raw of ['0', '-5', '1.5', 'nope', '70000']) {
            expect(
                positiveIntEnv('SNOWLUMA_TEST_INT', 15, {
                    max: 65535,
                    env: { SNOWLUMA_TEST_INT: raw },
                }),
            ).toBe(15);
        }
    });
});