Polymer 1.9 resolveUrl does not work as intended

[e111077]

Description

this.resolveUrl in a properties block is simply just not working as intended.

Live Demo

Wrong: http://jsbin.com/ridukodefe/2/edit?html,console
Intended: https://jsbin.com/sekeyeheso/1/edit?html,console

Steps to Reproduce

1. Create element
2. Add a property in the properties block
3. set value: function() { return this.resolveUrl('./relativeUrlThatExists')}
4. set the url of resolveUrl to something that exists.
5. observe that it does not find the proper url

Expected Results

it should return the actual absolute url

Actual Results

it just returns the same relative url entered

Browsers Affected

• Chrome
• Firefox
• Edge
• Safari 9
• Safari 8
• IE 11

Versions

• Polymer: v1.9.0
• webcomponents: v0

[kevinpschaaf]

Resolved via #4533.

[daniele-orlando]

I can still reproduce this bug on Polymer 1.9.3 and Polymer-Cli 1.5.2 under Vulcanize.

this.resolveUrl('../my-lib/element.html')
// => ../my-lib/element.html

The only differences between the state of resolveUrl in the Vulcanized and not-Vulcanized code is this:

not-Vulcanized

tempDocBase.href
// http://localhost:8000/bundle/my-app/

Vulcanized

tempDocBase.href
// /bundle/my-app/

The HTML Base tag seams to not work with only the path portion of the uri.

---

Update 1:
tempDocBase.href is computed from the _importPath variable which in turn is computed from the import link (not-Vulcanized) or the assetpath attribute of the dom-module (Vulcanized).

not-Vulcanized

var assetPath = module.getAttribute('assetpath') || '';
// ''
var importURL = Polymer.ResolveUrl.resolveUrl(assetPath, module.ownerDocument.baseURI);
// http://localhost:8000/bundle/my-app/my-app.html
this._importPath = Polymer.ResolveUrl.pathFromUrl(importURL);
// http://localhost:8000/bundle/my-app/

Vulcanized

var assetPath = module.getAttribute('assetpath') || '';
// /bundle/my-app/
var importURL = Polymer.ResolveUrl.resolveUrl(assetPath, module.ownerDocument.baseURI);
// /bundle/my-app/
this._importPath = Polymer.ResolveUrl.pathFromUrl(importURL);
// /bundle/my-app/