feat: support function calls, closes #222

src/context/context.ts

@@ -70,8 +70,8 @@ export class Context {
 export function readProperty (obj: Scope, key: string) {
   if (isNil(obj)) return obj
   obj = toLiquid(obj)
+  if (isFunction(obj[key])) return obj[key]()
   if (obj instanceof Drop) {
-    if (isFunction(obj[key])) return obj[key]()
     if (obj.hasOwnProperty(key)) return obj[key]
     return obj.liquidMethodMissing(key)
   }

test/e2e/issues.ts

@@ -70,4 +70,12 @@ describe('Issues', function () {
     const html = await engine.parseAndRender(`{{ '{{' }}{{ '}}' }}`)
     expect(html).to.equal('{{}}')
   })
+  it('#222 Support function calls', async () => {
+    const engine = new Liquid()
+    const html = await engine.parseAndRender(
+      `{{ obj.property }}`,
+      { obj: { property: () => 'BAR' } }
+    )
+    expect(html).to.equal('BAR')
+  })
 })

test/integration/builtin/filters/html.ts

@@ -9,9 +9,6 @@ describe('filters/html', function () {
     it('should escape normal string', function () {
       return test('{{ "Tetsuro Takara" | escape }}', 'Tetsuro Takara')
     })
-    it('should escape function', function () {
-      return test('{{ func | escape }}', { func: function () {} }, 'function () { }')
-    })
     it('should escape undefined', function () {
       return test('{{ nonExistent.value | escape }}', '')
     })

test/unit/context/context.ts

@@ -15,6 +15,8 @@ describe('Context', function () {
         first: 'f',
         last: 'l'
       },
+      func: () => 'FUNC',
+      objFunc: () => ({ prop: 'PROP' }),
       bar: {
         zoo: 'coo',
         'Mr.Smith': 'John',
@@ -59,6 +61,12 @@ describe('Context', function () {
     it('should read .last of array', async function () {
       expect(ctx.get(['bar', 'arr', 'last'])).to.equal('b')
     })
+    it('should call function', async function () {
+      expect(ctx.get(['func'])).to.equal('FUNC')
+    })
+    it('should call function before read nested property', async function () {
+      expect(ctx.get(['objFunc', 'prop'])).to.equal('PROP')
+    })
   })
 
   describe('#getFromScope()', function () {