@danielkalen/simplybind/comparison/dist/bower_components/aurelia-templating/test/view-compiler.spec.js

Magically simple, framework-less one-way/two-way data binding for frontend/backend in ~5kb.

import './setup';
import {ViewCompiler} from '../src/view-compiler';
import {ViewResources} from '../src/view-resources';

class MockBindingLanguage {
  inspectAttribute(resources, elementName, attrName, attrValue) {
  }

  createAttributeInstruction(resources, element, info, existingInstruction) {
  }

  inspectTextContent(resources, value) {
  }
}

describe('ViewCompiler', () => {
  var viewCompiler, language, resources;
  beforeAll(() => {
    language = new MockBindingLanguage();
    viewCompiler = new ViewCompiler(language);
    resources = new ViewResources(new ViewResources(), 'app.html');
  });

  describe('compile', () => {
    it('compiles an empty template', () => {
      var template = document.createElement('template'),
        node = document.createDocumentFragment(),
        factory;
      template.appendChild(node);
      factory = viewCompiler.compile(template, resources, null);
      expect(factory).not.toBe(null);
    });
  });

  describe('compileNode', () => {
    it('concatenates adjacent text nodes', () => {
      var instructions = [], parentInjectorId = 'root', targetLightDOM = true,
        node, parentNode;

      parentNode = document.createElement('div');
      node = document.createTextNode('Hello');
      parentNode.appendChild(node);
      parentNode.appendChild(document.createTextNode(' '));
      parentNode.appendChild(document.createTextNode('World'));
      parentNode.appendChild(document.createTextNode('!'));
      spyOn(language, 'inspectTextContent');

      node = viewCompiler._compileNode(node, resources, instructions, parentNode, parentInjectorId, targetLightDOM);
      expect(language.inspectTextContent).toHaveBeenCalledWith(resources, 'Hello World!');
      expect(node).toBe(null);
    });

    it('does not concatenate non-adjacent text nodes', () => {
      var instructions = [], parentInjectorId = 'root', targetLightDOM = true,
        node, parentNode, nextNode;

      parentNode = document.createElement('div');
      node = document.createTextNode('Hello');
      parentNode.appendChild(node);
      parentNode.appendChild(document.createTextNode(' '));
      nextNode = document.createElement('em');
      nextNode.textContent = 'World';
      parentNode.appendChild(nextNode);
      parentNode.appendChild(document.createTextNode('!'));
      spyOn(language, 'inspectTextContent');

      node = viewCompiler._compileNode(node, resources, instructions, parentNode, parentInjectorId, targetLightDOM);
      expect(language.inspectTextContent).toHaveBeenCalledWith(resources, 'Hello ');
      expect(node).toBe(nextNode);
    });

    it('clears class attributes containing interpolation expressions', () => {
      var instructions = [], parentInjectorId = 'root', targetLightDOM = true,
        node = document.createElement('div'), parentNode = null;
      node.setAttribute('class', 'foo ${bar} baz');
      spyOn(language, 'inspectAttribute').and.returnValue({
        attrName: 'class',
        expression: {attrToRemove: 'class'},
        command: null
      });
      spyOn(language, 'createAttributeInstruction').and.returnValue({
        attributes: {
          'class': {
            discrete: true,
            attrToRemove: 'class'
          }
        }, attrName: 'class'
      });
      viewCompiler._compileNode(node, resources, instructions, parentNode, parentInjectorId, targetLightDOM);
      expect(node.className).toBe('au-target');
    });

    it('does not clear class attributes with no interpolation expressions', () => {
      var instructions = [], parentInjectorId = 'root', targetLightDOM = true,
        node = document.createElement('div'), parentNode = null;

      node.setAttribute('class', 'foo bar baz');
      node.setAttribute('class.bind', 'someProperty');

      spyOn(language, 'inspectAttribute').and.callFake((resources, attrName, attrValue) => {
        if (attrName === 'class') {
          return {attrName: 'class', expression: null, command: null}
        } else {
          return {attrName: 'class', expression: null, command: 'bind'};
        }
      });

      spyOn(language, 'createAttributeInstruction').and.callFake((resources, node, info) => {
        if (info.command) {
          return {attributes: {'class': {discrete: true}}, attrName: 'class'};
        } else {
          return null;
        }
      });

      viewCompiler._compileNode(node, resources, instructions, parentNode, parentInjectorId, targetLightDOM);
      expect(node.className).toBe('foo bar baz au-target');
    });

  });

});