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## urltestdata.json
These tests are for browsers, but the data for
`a-element.html`, `url-constructor.html`, `a-element-xhtml.xhtml`, and `failure.html`
is in `resources/urltestdata.json` and can be re-used by non-browser implementations.
This file contains a JSON array of comments as strings and test cases as objects.
The keys for each test case are:
* `base`: an absolute URL as a string whose [parsing] without a base of its own must succeed.
This key is always present,
and may have a value like `"about:blank"` when `input` is an absolute URL.
* `input`: an URL as a string to be [parsed][parsing] with `base` as its base URL.
* Either:
* `failure` with the value `true`, indicating that parsing `input` should return failure,
* or `href`, `origin`, `protocol`, `username`, `password`, `host`, `hostname`, `port`,
`pathname`, `search`, and `hash` with string values;
indicating that parsing `input` should return an URL record
and that the getters of each corresponding attribute in that URL’s [API]
should return the corresponding value.
The `origin` key may be missing.
In that case, the API’s `origin` attribute is not tested.
In addition to testing that parsing `input` against `base` gives the result, a test harness for the
`URL` constructor (or similar APIs) should additionally test the following pattern: if `failure` is
true, parsing `about:blank` against `input` must give failure. This tests that the logic for
converting base URLs into strings properly fails the whole parsing algorithm if the base URL cannot
be parsed.
## setters_tests.json
`resources/setters_tests.json` is self-documented.
## toascii.json
`resources/toascii.json` is a JSON resource containing an array where each item is an object
consisting of an optional `comment` field and mandatory `input` and `output` fields. `input` is the
domain to be parsed according to the rules of UTS #46 (as stipulated by the URL Standard). `output`
gives the expected output of the parser after serialization. An `output` of `null` means parsing is
expected to fail.
## URL parser's encoding argument
Tests in `/encoding` and `/html/infrastructure/urls/resolving-urls/query-encoding/` cover the
encoding argument to the URL parser.
There's also limited coverage in `resources/percent-encoding.json` for percent-encode after encoding
with _percentEncodeSet_ set to special-query percent-encode set and _spaceAsPlus_ set to false.
(Improvements to expand coverage here are welcome.)
## Specification
The tests in this directory assert conformance with [the URL Standard][URL].
[parsing]: https://url.spec.whatwg.org/#concept-basic-url-parser
[API]: https://url.spec.whatwg.org/#api
[URL]: https://url.spec.whatwg.org/
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