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[rbdr/forum] / src / utils / glyph_hash.test.js

import { getGlyphHash } from './glyph_hash';


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 = {};

    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}/));
      }
    });
  });
});