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tests: load JSON fixtures at runtime for crates.io archives #444

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147ef3e
tests: load JSON fixtures at runtime for crates.io archives
rome-xi Aug 24, 2026
1f7943e
style: cargo fmt
rome-xi Aug 25, 2026
07c058c
style: cargo fmt
rome-xi Aug 25, 2026
6ab3796
test: skip JSON fixture tests under miri isolation
rome-xi Aug 28, 2026
f0428ac
tests: keep include_str! for miri JSON fixtures
rome-xi Aug 31, 2026
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79 changes: 54 additions & 25 deletions src/tests.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -21,6 +21,41 @@ use super::{
ToCss, Token, TokenSerializationType, UnicodeRange,
};

fn css_parsing_test_json(file_name: &str) -> String {
// Fixtures are Cargo.toml `exclude`d so crates.io packages can compile tests
// without include_str!. Miri isolation cannot open() them, so keep
// include_str! on the miri path (git checkout only).
css_parsing_test_json_impl(file_name)
}

#[cfg(miri)]
fn css_parsing_test_json_impl(file_name: &str) -> String {
let s = match file_name {
"component_value_list.json" => include_str!("css-parsing-tests/component_value_list.json"),
"one_component_value.json" => include_str!("css-parsing-tests/one_component_value.json"),
"declaration_list.json" => include_str!("css-parsing-tests/declaration_list.json"),
"one_declaration.json" => include_str!("css-parsing-tests/one_declaration.json"),
"rule_list.json" => include_str!("css-parsing-tests/rule_list.json"),
"stylesheet.json" => include_str!("css-parsing-tests/stylesheet.json"),
"one_rule.json" => include_str!("css-parsing-tests/one_rule.json"),
"stylesheet_bytes.json" => include_str!("css-parsing-tests/stylesheet_bytes.json"),
"An+B.json" => include_str!("css-parsing-tests/An+B.json"),
"urange.json" => include_str!("css-parsing-tests/urange.json"),
other => panic!("unknown css-parsing-tests fixture: {other}"),
};
s.to_owned()
}

#[cfg(not(miri))]
fn css_parsing_test_json_impl(file_name: &str) -> String {
let path = format!(
"{}/src/css-parsing-tests/{}",
env!("CARGO_MANIFEST_DIR"),
file_name
);
std::fs::read_to_string(&path).unwrap()
}

macro_rules! JArray {
($($e: expr,)*) => { JArray![ $( $e ),* ] };
($($e: expr),*) => { Value::Array(vec!( $( $e.to_json() ),* )) }
Expand Down Expand Up @@ -108,15 +143,15 @@ fn run_json_tests<F: Fn(&mut Parser) -> Value>(json_data: &str, parse: F) {
#[test]
fn component_value_list() {
run_json_tests(
include_str!("css-parsing-tests/component_value_list.json"),
&css_parsing_test_json("component_value_list.json"),
|input| Value::Array(component_values_to_json(input)),
);
}

#[test]
fn one_component_value() {
run_json_tests(
include_str!("css-parsing-tests/one_component_value.json"),
&css_parsing_test_json("one_component_value.json"),
|input| {
let result: Result<Value, ParseError<()>> = input.parse_entirely(|input| {
Ok(one_component_value_to_json(input.next()?.clone(), input))
Expand All @@ -128,31 +163,25 @@ fn one_component_value() {

#[test]
fn declaration_list() {
run_json_tests(
include_str!("css-parsing-tests/declaration_list.json"),
|input| {
Value::Array(
RuleBodyParser::new(input, &mut JsonParser)
.map(|result| result.unwrap_or(JArray!["error", "invalid"]))
.collect(),
)
},
);
run_json_tests(&css_parsing_test_json("declaration_list.json"), |input| {
Value::Array(
RuleBodyParser::new(input, &mut JsonParser)
.map(|result| result.unwrap_or(JArray!["error", "invalid"]))
.collect(),
)
});
}

#[test]
fn one_declaration() {
run_json_tests(
include_str!("css-parsing-tests/one_declaration.json"),
|input| {
parse_one_declaration(input, &mut JsonParser).unwrap_or(JArray!["error", "invalid"])
},
);
run_json_tests(&css_parsing_test_json("one_declaration.json"), |input| {
parse_one_declaration(input, &mut JsonParser).unwrap_or(JArray!["error", "invalid"])
});
}

#[test]
fn rule_list() {
run_json_tests(include_str!("css-parsing-tests/rule_list.json"), |input| {
run_json_tests(&css_parsing_test_json("rule_list.json"), |input| {
Value::Array(
RuleBodyParser::new(input, &mut JsonParser)
.map(|result| result.unwrap_or(JArray!["error", "invalid"]))
Expand All @@ -163,7 +192,7 @@ fn rule_list() {

#[test]
fn stylesheet() {
run_json_tests(include_str!("css-parsing-tests/stylesheet.json"), |input| {
run_json_tests(&css_parsing_test_json("stylesheet.json"), |input| {
Value::Array(
StyleSheetParser::new(input, &mut JsonParser)
.map(|result| result.unwrap_or(JArray!["error", "invalid"]))
Expand All @@ -174,7 +203,7 @@ fn stylesheet() {

#[test]
fn one_rule() {
run_json_tests(include_str!("css-parsing-tests/one_rule.json"), |input| {
run_json_tests(&css_parsing_test_json("one_rule.json"), |input| {
parse_one_rule(input, &mut JsonParser).unwrap_or(JArray!["error", "invalid"])
});
}
Expand All @@ -200,7 +229,7 @@ fn stylesheet_from_bytes() {
}

run_raw_json_tests(
include_str!("css-parsing-tests/stylesheet_bytes.json"),
&css_parsing_test_json("stylesheet_bytes.json"),
|input, expected| {
let map = match input {
Value::Object(map) => map,
Expand Down Expand Up @@ -354,7 +383,7 @@ fn test_expect_url() {

#[test]
fn nth() {
run_json_tests(include_str!("css-parsing-tests/An+B.json"), |input| {
run_json_tests(&css_parsing_test_json("An+B.json"), |input| {
input
.parse_entirely(|i| {
let result: Result<_, ParseError<()>> = parse_nth(i).map_err(Into::into);
Expand Down Expand Up @@ -383,7 +412,7 @@ fn parse_comma_separated_ignoring_errors() {

#[test]
fn unicode_range() {
run_json_tests(include_str!("css-parsing-tests/urange.json"), |input| {
run_json_tests(&css_parsing_test_json("urange.json"), |input| {
let result: Result<_, ParseError<()>> = input.parse_comma_separated(|input| {
let result = UnicodeRange::parse(input).ok().map(|r| (r.start, r.end));
if input.is_exhausted() {
Expand Down Expand Up @@ -420,7 +449,7 @@ fn serializer_preserving_comments() {

fn serializer(preserve_comments: bool) {
run_json_tests(
include_str!("css-parsing-tests/component_value_list.json"),
&css_parsing_test_json("component_value_list.json"),
|input| {
fn write_to(
mut previous_token: TokenSerializationType,
Expand Down