core/packages/renderer-runner/js/renderer-contract.js

/**
 * Renderer Runner — renderer/contract suite
 *
 * Tests the sw.renderers registry contract.
 * Requires mermaid-renderer to be installed and loaded.
 */
(function () {
  'use strict';

  sw.testing.suite('renderer/contract', async function (s) {

    s.test('sw.renderers exists', async function (t) {
      t.assert.ok(sw.renderers, 'sw.renderers is defined');
      t.assert.ok(typeof sw.renderers.register === 'function', 'register is a function');
      t.assert.ok(typeof sw.renderers.list === 'function', 'list is a function');
      t.assert.ok(typeof sw.renderers.runBlockRenderers === 'function', 'runBlockRenderers is a function');
      t.assert.ok(typeof sw.renderers.runPostRenderers === 'function', 'runPostRenderers is a function');
    });

    s.test('mermaid renderer registered', async function (t) {
      var info = sw.renderers.list();
      t.assert.ok(info.block, 'block renderers list exists');
      t.assert.ok(Array.isArray(info.block), 'block is array');
      var mermaid = info.block.find(function (r) { return r.name === 'mermaid'; });
      if (!mermaid) {
        t.warn('Mermaid renderer not found in block list — extension may not have loaded yet');
        return;
      }
      t.assert.ok(mermaid, 'mermaid renderer found');
      t.assert.eq(mermaid.pattern, 'mermaid', 'pattern matches "mermaid"');
    });

    s.test('block renderer match', async function (t) {
      // Test that runBlockRenderers returns true for 'mermaid' lang
      // We need a container element for the render call
      t.browserOnly(function () {
        var container = document.createElement('div');
        var handled = sw.renderers.runBlockRenderers('mermaid', 'graph LR; A-->B', container);
        t.assert.ok(handled, 'mermaid block was handled by a renderer');
      });
    });

    s.test('unmatched block returns false', async function (t) {
      t.browserOnly(function () {
        var container = document.createElement('div');
        var handled = sw.renderers.runBlockRenderers('nonexistent-lang-xyz', 'code', container);
        t.assert.eq(handled, false, 'unmatched lang returns false');
      });
    });
  });
})();