fix(event emission): Commit failing test

Proves watches are not being registered

Author: bmuenzenmeyer

test/watchPatternLabFiles_tests.js

@@ -0,0 +1,44 @@
+'use strict';
+
+const _ = require('lodash');
+const tap = require('tap');
+const rewire = require('rewire');
+const path = require('path');
+
+const util = require('./util/test_utils.js');
+const watchPatternLabFiles = rewire('../core/lib/watchPatternLabFiles');
+
+const patterns_dir = './test/files/_patterns';
+
+tap.test(
+  'watchPatternLabFiles - adds watcher to patternlab.watchers for given patternWatchPath',
+  test => {
+    const pl = util.fakePatternLab(patterns_dir, {
+      watchers: [],
+      engines: {},
+    });
+
+    pl.engines.getSupportedFileExtensions = () => {
+      return ['.mustache'];
+    };
+
+    watchPatternLabFiles(
+      pl,
+      {
+        source: {
+          data: '_data',
+          meta: '_meta',
+          patterns: 'patterns',
+        },
+      },
+      '/foo',
+      true
+    );
+
+    // should have two for _data and _meta
+    // should have five for '.json', '.yml', '.yaml', '.md' and '.mustache'
+    test.equals(Object.keys(pl.watchers).length, 7);
+
+    test.end();
+  }
+);