URL: URL.canParse()

For whatwg/url#763.

url/url-statics-canparse.any.js

@@ -0,0 +1,42 @@
+// This intentionally does not use resources/urltestdata.json to preserve resources.
+[
+  {
+    "url": undefined,
+    "base": undefined,
+    "expected": false
+  },
+  {
+    "url": "a:b",
+    "base": undefined,
+    "expected": true
+  },
+  {
+    "url": undefined,
+    "base": "a:b",
+    "expected": false
+  },
+  {
+    "url": "a:/b",
+    "base": undefined,
+    "expected": true
+  },
+  {
+    "url": undefined,
+    "base": "a:/b",
+    "expected": true
+  },
+  {
+    "url": "https://test:test",
+    "base": undefined,
+    "expected": false
+  },
+  {
+    "url": "a",
+    "base": "https://b/",
+    "expected": true
+  }
+].forEach(({ url, base, expected }) => {
+  test(() => {
+    assert_equals(URL.canParse(url, base), expected);
+  }, `URL.canParse(${url}, ${base})`);
+});