git.r.bdr.sh - rbdr/forum/blob - src/lib/utils/glyph_hash.test.ts

   1 import { getGlyphHash } from './glyph_hash';
   2 import type { GlyphHash } from './glyph_hash';
   3
   4 type TestState = {
   5   glyphHash?: GlyphHash
   6 };
   7
   8
   9 describe('Glyph Hash utility', () => {
  10
  11   test('it throws an exception if the string is too short', () => {
  12
  13     expect(() => {
  14
  15       getGlyphHash('short');
  16     }).toThrow();
  17
  18     expect(() => {
  19
  20       getGlyphHash('abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ');
  21     }).toThrow();
  22
  23     expect(() => {
  24
  25       getGlyphHash('abcdefghijklmnopqrstuvwxyzABCDEF');
  26     }).not.toThrow();
  27   });
  28
  29   test('it treats UUIDs with hyphens the same as those without', () => {
  30
  31     const uuidWithHyphens = 'f7722355-2285-46c0-a55f-3483a826f3a6';
  32     const uuidWithoutHyphens = 'f7722355228546c0a55f3483a826f3a6';
  33
  34     expect(getGlyphHash(uuidWithHyphens)).toEqual(getGlyphHash(uuidWithoutHyphens));
  35   });
  36
  37   describe('it generates four sets of glyphs and colors', () => {
  38
  39     const state: TestState = {};
  40
  41     beforeEach(() => {
  42
  43       state.glyphHash = getGlyphHash('f7722355-2285-46c0-a55f-3483a826f3a6');
  44     });
  45
  46     test('there should be four glyph fragments', () => {
  47
  48       expect(state.glyphHash.length).toBe(4);
  49     });
  50
  51     test('each fragment should have a single character glyph', () => {
  52
  53       for (const glyphHashFragment of state.glyphHash) {
  54         expect(typeof glyphHashFragment.glyph).toBe('string');
  55         expect(glyphHashFragment.glyph.length).toBe(1);
  56       }
  57     });
  58
  59     test('each fragment should have a hexadecimal color', () => {
  60
  61       for (const glyphHashFragment of state.glyphHash) {
  62         expect(typeof glyphHashFragment.color).toBe('string');
  63         expect(glyphHashFragment.color.length).toBe(7);
  64         expect(glyphHashFragment.color).toEqual(expect.stringMatching(/#[0-9a-f]{6}/));
  65       }
  66     });
  67   });
  68 });