1  import assert  from 'assert';
 2  import { Font, Path, Glyph } from '../src/opentype';
 3  import Layout  from '../src/layout';
 4  
 5  describe('layout.js', function() {
 6      let font;
 7      let layout;
 8      const notdefGlyph = new Glyph({
 9          name: '.notdef',
10          unicode: 0,
11          path: new Path()
12      });
13      const defaultLayoutTable = {
14          version: 1,
15          scripts: [],
16          features: [],
17          lookups: []
18      };
19  
20      const glyphs = [notdefGlyph].concat('abcdefghijklmnopqrstuvwxyz'.split('').map(function (c) {
21          return new Glyph({
22              name: c,
23              unicode: c.charCodeAt(0),
24              path: new Path()
25          });
26      }));
27  
28      beforeEach(function() {
29          font = new Font({
30              familyName: 'MyFont',
31              styleName: 'Medium',
32              unitsPerEm: 1000,
33              ascender: 800,
34              descender: -200,
35              glyphs: glyphs
36          });
37          layout = new Layout(font, 'gsub');
38          layout.createDefaultTable = function() { return defaultLayoutTable; };
39      });
40  
41      describe('getTable', function() {
42          it('must not always create an empty default layout table', function() {
43              assert.equal(layout.getTable(), undefined);
44              assert.equal(layout.getTable(false), undefined);
45          });
46  
47          it('must create an empty default layout table on demand', function() {
48              assert.equal(layout.getTable(true), defaultLayoutTable);
49          });
50      });
51  
52      describe('getScriptTable', function() {
53          it('must not create a new script table if it does not exist', function() {
54              assert.equal(layout.getScriptTable('DFLT'), undefined);
55              assert.equal(layout.getScriptTable('DFLT', false), undefined);
56          });
57  
58          it('must create an new script table only on demand and if it does not exist', function() {
59              const scriptTable = layout.getScriptTable('DFLT', true);
60              assert.notEqual(scriptTable, undefined);
61              assert.notEqual(scriptTable.defaultLangSys, undefined);
62              assert.equal(layout.getScriptTable('DFLT', true), scriptTable, 'must create only one instance for each tag');
63          });
64      });
65  });