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import { getGlyphHash } from './glyph_hash';
import type { GlyphHash } from './glyph_hash';
type TestState = {
glyphHash?: GlyphHash;
};
describe('Glyph Hash utility', () => {
test('it throws an exception if the string is too short', () => {
expect(() => {
getGlyphHash('short');
}).toThrow();
expect(() => {
getGlyphHash('abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ');
}).toThrow();
expect(() => {
getGlyphHash('abcdefghijklmnopqrstuvwxyzABCDEF');
}).not.toThrow();
});
test('it treats UUIDs with hyphens the same as those without', () => {
const uuidWithHyphens = 'f7722355-2285-46c0-a55f-3483a826f3a6';
const uuidWithoutHyphens = 'f7722355228546c0a55f3483a826f3a6';
expect(getGlyphHash(uuidWithHyphens)).toEqual(getGlyphHash(uuidWithoutHyphens));
});
describe('it generates four sets of glyphs and colors', () => {
const state: TestState = {};
beforeEach(() => {
state.glyphHash = getGlyphHash('f7722355-2285-46c0-a55f-3483a826f3a6');
});
test('there should be four glyph fragments', () => {
expect(state.glyphHash.length).toBe(4);
});
test('each fragment should have a single character glyph', () => {
for (const glyphHashFragment of state.glyphHash) {
expect(typeof glyphHashFragment.glyph).toBe('string');
expect(glyphHashFragment.glyph.length).toBe(1);
}
});
test('each fragment should have a hexadecimal color', () => {
for (const glyphHashFragment of state.glyphHash) {
expect(typeof glyphHashFragment.color).toBe('string');
expect(glyphHashFragment.color.length).toBe(7);
expect(glyphHashFragment.color).toEqual(expect.stringMatching(/#[0-9a-f]{6}/));
}
});
});
});
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