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Parser tests: Difference between revisions

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(The documentation now lives in the repo, so this can die.)
 
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=Parser Tests=
[https://github.com/html5lib/html5lib-tests html5lib-tests] is a suite of unit tests for use by implementations of the HTML spec. The aim is to produce implementation-independent, self-describing tests that can be shared between any groups working on these technologies. The parser tests live in the <code>tokenizer</code> and <code>tree-construction</code> directories, both of which contain README files describing the test format.
 
This page documents the unit-test format(s) being used for implementations of the HTML5 parsing spec. The aim is to produce implementation-independent, self-describing tests that can be shared between any groups working on these technologies.
 
==Tokenizer Tests==
The test format is [http://www.json.org/ json]. This has the advantage that the syntax allows backward-compatible extensions to the tests and the disadvantage that it is relatively verbose.
 
===Basic Structure===
 
{"tests":
[
{"description":"Test description",
"input":"input_string",
"output":[expected_output_tokens]}
]
}
 
input_string is a string literal containing the input string to pass to the tokenizer
expected_output_tokens is a list of tokens, ordered with the first produced by the tokenizer the first (leftmost) in the list. The list must mach the '''complete''' list of tokens that the tokenizer should produce. Valid tokens are:
 
["DOCTYPE", name, error?]
["StartTag", name, {attributes}])
["EndTag", name]
["Comment", data]
["Character", data]
"ParseError"
"AtheistParseError"
 
 
Multiple tests per file are allowed simply by adding more objects to the "tests" list.
 
=== Open Issues ===
* Is the format too verbose?
* Do we want to allow the starting content model flag of the tokenizer to be specified (e.g. through a "contentModel" field in the test objects?
* Do we want to allow the test to pass if only a subset of the actual tokens emitted matches the expected_output_tokens list?
* Do we want the "AtheistParseError"?

Latest revision as of 16:56, 24 October 2013

html5lib-tests is a suite of unit tests for use by implementations of the HTML spec. The aim is to produce implementation-independent, self-describing tests that can be shared between any groups working on these technologies. The parser tests live in the tokenizer and tree-construction directories, both of which contain README files describing the test format.

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