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feat(cli): support snapshot testing with --update flag

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This PR adds an `--update` flag to the `tree-sitter test` command, which adds the ability to replace the _expected_ output in the corpus.txt with the _actual_ output produced by the parser, that is, we can now simply use this `--update` flag to write all the corresponding parser output back to the corpus.txt, and we just need to check the output without typing its actual sexp.

- use the same output format as `tree-sitter parse`, except there won't be any position information printed.
- the corpus.txt won't be touched if there's no difference between the _expected_ output and the _actual_ output in that file.
- if there're differences between _expected_ and _actual_, only the test case that is different will be replaced, the rest test cases will stay as-is. (All the delimiters `===`/`---` will be normalized as 80-column long, though.)
- this flag also works with `--filter` flag.
This commit is contained in:
Ika 2019-09-01 23:52:39 +08:00
parent 4b0489e2f3
commit 1b033fdfa4
6 changed files with 274 additions and 105 deletions
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6
cli/src/main.rs
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@ -83,7 +83,8 @@ fn run() -> error::Result<()> {
.takes_value(true),
)
.arg(Arg::with_name("debug").long("debug").short("d"))
.arg(Arg::with_name("debug-graph").long("debug-graph").short("D")),
.arg(Arg::with_name("debug-graph").long("debug-graph").short("D"))
.arg(Arg::with_name("update").long("update").short("u")),
)
.subcommand(
SubCommand::with_name("highlight")
@ -150,9 +151,10 @@ fn run() -> error::Result<()> {
let debug = matches.is_present("debug");
let debug_graph = matches.is_present("debug-graph");
let filter = matches.value_of("filter");
let update = matches.is_present("update");
let corpus_path = current_dir.join("corpus");
if let Some(language) = loader.languages_at_path(&current_dir)?.first() {
test::run_tests_at_path(*language, &corpus_path, debug, debug_graph, filter)?;
test::run_tests_at_path(*language, &corpus_path, debug, debug_graph, filter, update)?;
} else {
eprintln!("No language found");
}