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import { describe, expect, test } from 'vitest';
import {
IS_BOLD,
IS_CODE,
IS_HIGHLIGHT,
IS_ITALIC,
IS_STRIKETHROUGH,
IS_SUBSCRIPT,
IS_SUPERSCRIPT,
IS_UNDERLINE,
} from './node-format';
describe('node format bit flags', () => {
test('uses power-of-two values for unique bitmasks', () => {
const flags = [
IS_BOLD,
IS_ITALIC,
IS_STRIKETHROUGH,
IS_UNDERLINE,
IS_CODE,
IS_SUBSCRIPT,
IS_SUPERSCRIPT,
IS_HIGHLIGHT,
];
for (const flag of flags) {
expect((flag & (flag - 1)) === 0).toBe(true);
}
});
test('can combine and detect individual flags with bitwise operations', () => {
const format = IS_BOLD | IS_ITALIC | IS_CODE;
expect((format & IS_BOLD) !== 0).toBe(true);
expect((format & IS_ITALIC) !== 0).toBe(true);
expect((format & IS_CODE) !== 0).toBe(true);
expect((format & IS_UNDERLINE) !== 0).toBe(false);
});
});
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