feat: Add 'file_loader' option to json parser

src/parser/parser.js

@@ -4,15 +4,17 @@ import create_state_handler from '../state_handler.js'
 /** Creates a function that parses a JSON component and compiles it into a
  * Javascript component
   * @param {Function} component_loader - A function that can load components*/
-const parse = (component_loader) => (input) => {
+const parse = (component_loader) => (input, file_loader) => {
   if (!(typeof input === 'object')) throw new Error('An object is required')
   validators.required('component')(input)
   validators.regexp('component', /^[A-z]\w*$/)(input)
 
   const component = component_loader(input.component)
   const args = Object.assign({}, input.args)
-  if (input.component === 'root')
+  if (input.component === 'root') {
     args.state_handler = create_state_handler()
+    args.file_loader = file_loader
+  }
   const bind = component(args)
 
   return (selection) => {

src/parser/parser.test.js

@@ -70,7 +70,24 @@ describe('Parser', function() {
     component(my_selection)
     fake_component.should.be.calledWith({
       'title': '',
-      'state_handler': fake_state_handler
+      'state_handler': fake_state_handler,
+      'file_loader': sinon.match.any
+    })
+  })
+
+  it('passes file_loader to root', () => {
+    const fake_component = sinon.stub().returns(
+      sinon.stub().returns(sinon.spy()))
+    const fake_component_loader = sinon.stub().returns(fake_component)
+    const my_selection = null
+    const my_file_loader = sinon.spy()
+    const component = parse(fake_component_loader)(
+      {'component': 'root', 'args': {'title': ''}}, my_file_loader)
+    component(my_selection)
+    fake_component.should.be.calledWith({
+      'title': '',
+      'state_handler': sinon.match.any,
+      'file_loader': my_file_loader,
     })
   })