Make test() and exec() accept URL

The original specification did not explicitly accept a URL object as an
input, and expected implicit conversion from the URL object to the
URLPatternInit object for matching.

This change make the URL object accepted as an input explicitly.
This is a step to fix #218.

spec.bs

@@ -11,6 +11,7 @@ Markup Shorthands: markdown yes
 <pre class="link-defaults">
 spec:infra; type:dfn; text:list
 spec:webidl; type:dfn; text:record
+spec:url; type:interface; text:URL
 </pre>
 
 <pre class="anchors">
@@ -21,6 +22,15 @@ spec: ECMASCRIPT; urlPrefix: https://tc39.es/ecma262/
 spec: URL; urlPrefix: https://url.spec.whatwg.org/
   type: dfn
     text: serialize an integer; url: #serialize-an-integer
+    text: url; url: #concept-url
+    text: scheme; for: url; url: #concept-url-scheme
+    text: username; for: url; url: #concept-url-username
+    text: password; for: url; url: #concept-url-password
+    text: host; for: url; url: #concept-url-host
+    text: port; for: url; url: #concept-url-port
+    text: path; for: url; url: #concept-url-path
+    text: query; for: url; url: #concept-url-query
+    text: fragment; for: url; url: #concept-url-fragment
 </pre>
 
 <h2 id=urlpatterns>URL patterns</h2>
@@ -171,15 +181,16 @@ It can be constructed using a string for each component, or from a shorthand str
 
 <xmp class="idl">
 typedef (USVString or URLPatternInit) URLPatternInput;
+typedef (URLPatternInput or URL) URLPatternMatchInput;
 
 [Exposed=(Window,Worker)]
 interface URLPattern {
   constructor(URLPatternInput input, USVString baseURL, optional URLPatternOptions options = {});
   constructor(optional URLPatternInput input = {}, optional URLPatternOptions options = {});
 
-  boolean test(optional URLPatternInput input = {}, optional USVString baseURL);
+  boolean test(optional URLPatternMatchInput input = {}, optional USVString baseURL);
 
-  URLPatternResult? exec(optional URLPatternInput input = {}, optional USVString baseURL);
+  URLPatternResult? exec(optional URLPatternMatchInput input = {}, optional USVString baseURL);
 
   readonly attribute USVString protocol;
   readonly attribute USVString username;
@@ -468,7 +479,7 @@ A <dfn>component</dfn> is a [=struct=] with the following [=struct/items=]:
 </div>
 
 <div algorithm>
-  To perform a <dfn export for="URL pattern">match</dfn> given a [=URL pattern=] |urlPattern|, a {{URLPatternInput}} |input|, and an optional string |baseURLString|:
+  To perform a <dfn export for="URL pattern">match</dfn> given a [=URL pattern=] |urlPattern|, a {{URLPatternMatchInput}} |input|, and an optional string |baseURLString|:
 
   1. Let |protocol| be the empty string.
   1. Let |username| be the empty string.
@@ -480,7 +491,17 @@ A <dfn>component</dfn> is a [=struct=] with the following [=struct/items=]:
   1. Let |hash| be the empty string.
   1. Let |inputs| be an empty [=list=].
   1. [=list/Append=] |input| to |inputs|.
-  1. If |input| is a {{URLPatternInit}} then:
+  1. If |input| is a {{URL}} then:
+    1. Let |associatedUrl| be |input|'s associated [=URL=].
+    1. Set |protocol| to |associatedUrl|'s [=url/scheme=].
+    1. Set |username| to |associatedUrl|'s [=url/username=].
+    1. Set |password| to |associatedUrl|'s [=url/password=].
+    1. Set |hostname| to |associatedUrl|'s [=url/host=].
+    1. Set |port| to |associatedUrl|'s [=url/port=].
+    1. Set |pathname| to |associatedUrl|'s [=url/path=].
+    1. Set |search| to |associatedUrl|'s [=url/query=].
+    1. Set |hash| to |associatedUrl|'s [=url/fragment=].
+  1. Else if |input| is a {{URLPatternInit}} then:
     1. If |baseURLString| was given, throw a {{TypeError}}.
     1. Let |applyResult| be the result of [=process a URLPatternInit=] given |input|, "url", |protocol|, |username|, |password|, |hostname|, |port|, |pathname|, |search|, and |hash|. If this throws an exception, catch it, and return null.
     1. Set |protocol| to |applyResult|["{{URLPatternInit/protocol}}"].
@@ -491,7 +512,8 @@ A <dfn>component</dfn> is a [=struct=] with the following [=struct/items=]:
     1. Set |pathname| to |applyResult|["{{URLPatternInit/pathname}}"].
     1. Set |search| to |applyResult|["{{URLPatternInit/search}}"].
     1. Set |hash| to |applyResult|["{{URLPatternInit/hash}}"].
-  1. Otherwise:
+  1. Else:
+    1. [=Assert=]: |input| is a {{USVString}}.
     1. Let |baseURL| be null.
     1. If |baseURLString| was given, then:
       1. Set |baseURL| to the result of [=URL parser|parsing=] |baseURLString|.