fix: coerce to Array in map and where filter

test/stub/render.ts

@@ -3,25 +3,14 @@ import { expect } from 'chai'
 
 export const liquid = new Liquid()
 
-export const ctx = {
-  date: new Date(),
-  foo: 'bar',
-  arr: [-2, 'a'],
-  obj: { foo: 'bar' },
-  func: function () {}, // eslint-disable-line
-  posts: [{ category: 'foo' }, { category: 'bar' }],
-  products: [
-    { title: 'Vacuum', type: 'living room' },
-    { title: 'Spatula', type: 'kitchen' },
-    { title: 'Television', type: 'living room' },
-    { title: 'Garlic press', type: 'kitchen' },
-    { title: 'Coffee mug', available: true },
-    { title: 'Limited edition sneakers', available: false },
-    { title: 'Boring sneakers', available: true }
-  ]
+export function render (src: string, ctx?: object) {
+  return liquid.parseAndRender(src, ctx)
 }
 
-export async function test (src: string, dst: string) {
-  const html = await liquid.parseAndRender(src, ctx)
-  return expect(html).to.equal(dst)
+export async function test (src: string, ctx: object | string, dst?: string) {
+  if (dst === undefined) {
+    dst = ctx as string
+    ctx = {}
+  }
+  return expect(await render(src, ctx as object)).to.equal(dst)
 }