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Test Info:

promise_test(() => fetch("resources/toascii.json").then(res => res.json()).then(runTests), "Loading data…");
function makeURL(type, input) {
input = "https://" + input + "/x"
if(type === "url") {
return new URL(input)
} else {
const url = document.createElement(type)
url.href = input
return url
}
}
function runTests(tests) {
for(var i = 0, l = tests.length; i < l; i++) {
let hostTest = tests[i]
if (typeof hostTest === "string") {
continue // skip comments
}
const typeName = { "url": "URL", "a": "<a>", "area": "<area>" }
;["url", "a", "area"].forEach((type) => {
test(() => {
if(hostTest.output !== null) {
const url = makeURL("url", hostTest.input)
assert_equals(url.host, hostTest.output)
assert_equals(url.hostname, hostTest.output)
assert_equals(url.pathname, "/x")
assert_equals(url.href, "https://" + hostTest.output + "/x")
} else {
if(type === "url") {
assert_throws_js(TypeError, () => makeURL("url", hostTest.input))
} else {
const url = makeURL(type, hostTest.input)
assert_equals(url.host, "")
assert_equals(url.hostname, "")
assert_equals(url.pathname, "")
assert_equals(url.href, "https://" + hostTest.input + "/x")
}
}
}, hostTest.input + " (using " + typeName[type] + ")")
;["host", "hostname"].forEach((val) => {
test(() => {
const url = makeURL(type, "x")
url[val] = hostTest.input
if(hostTest.output !== null) {
assert_equals(url[val], hostTest.output)
} else {
assert_equals(url[val], "x")
}
}, hostTest.input + " (using " + typeName[type] + "." + val + ")")
})
})
}
}