abstract-state-router/test/helpers/asserting-renderer-factory.js

The basics of a client-side state router ala the AngularJS ui-router, but without any DOM interactions

module.exports = function assertingRendererFactory(t, expectedTemplates) {
	var makeRenderer = function makeRenderer() {
		return {
			render: function render(context, cb) {
				var template = context.template
				t.ok(expectedTemplates.length, 'The render function hasn\'t been called too many times yet')
				var expected = expectedTemplates.shift()
				t.equal(expected, template, 'The expected template was sent to the render function')

				process.nextTick(function() {
					cb(null, {
						template: template
					})
				})
			},
			reset: function reset(context, cb) {
				setTimeout(cb, 100)
			},
			destroy: function destroy(renderedTemplateApi, cb) {
				setTimeout(cb, 100)
			},
			getChildElement: function getChildElement(renderedTemplateApi, cb) {
				setTimeout(function() {
					cb(null, 'dummy child element')
				}, 100)
			}
		}
	}

	makeRenderer.expectedAssertions = expectedTemplates.length * 2

	return makeRenderer
}