fix: default length for truncate and truncatewords

test/unit/liquid/liquid-options.ts

@@ -0,0 +1,15 @@
+import { normalize } from 'src/liquid-options'
+import { expect } from 'chai'
+
+describe('LiquidOptions', function () {
+  describe('#normalize ()', function () {
+    it('should normalize string typed root array', function () {
+      const options = normalize({root: 'foo'})
+      expect(options.root).to.eql(['foo'])
+    })
+    it('should normalize null typed root as empty array', function () {
+      const options = normalize({root: null} as any)
+      expect(options.root).to.eql([])
+    })
+  })
+})