move URL resolution to the end of u- processing

implements proposal in microformats/microformats2-parsing#10

microformats.go

@@ -388,9 +388,6 @@ func (p *parser) walk(node *html.Node) {
 				if value == nil && isAtom(node, atom.Video) {
 					value = getAttrPtr(node, "poster")
 				}
-				if value != nil {
-					*value = expandURL(*value, p.base)
-				}
 				if value == nil {
 					value = getValueClassPattern(node)
 				}
@@ -404,6 +401,9 @@ func (p *parser) walk(node *html.Node) {
 					value = new(string)
 					*value = strings.TrimSpace(getTextContent(node, nil))
 				}
+				if value != nil {
+					*value = expandURL(*value, p.base)
+				}
 				if curItem != nil && p.curItem != nil {
 					embedValue = getFirstPropValue(curItem, "url")
 				}

testsuite_test.go

@@ -39,7 +39,9 @@ import (
 )
 
 // skip the tests which we don't pass yet
-var skipTests = []string{}
+var skipTests = []string{
+	"microformats-v1/hcard/email", // https://github.com/microformats/tests/pull/108
+}
 
 func TestSuite(t *testing.T) {
 	for _, version := range []string{"microformats-mixed", "microformats-v1", "microformats-v2"} {