65 lines
2.1 KiB
Rust
65 lines
2.1 KiB
Rust
// http://rust-lang.org/COPYRIGHT.
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//
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// #[test_case] is used by custom test authors to mark tests
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// When building for test, it needs to make the item public and gensym the name
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// Otherwise, we'll omit the item. This behavior means that any item annotated
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// with #[test_case] is never addressable.
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//
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// We mark item with an inert attribute "rustc_test_marker" which the test generation
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// logic will pick up on.
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use syntax::ext::base::*;
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use syntax::ext::build::AstBuilder;
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use syntax::ext::hygiene::{Mark, SyntaxContext};
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use syntax::ast;
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use syntax::source_map::respan;
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use syntax::symbol::sym;
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use syntax_pos::{DUMMY_SP, Span};
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use syntax::source_map::{ExpnInfo, MacroAttribute};
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use syntax::feature_gate;
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pub fn expand(
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ecx: &mut ExtCtxt<'_>,
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attr_sp: Span,
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_meta_item: &ast::MetaItem,
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anno_item: Annotatable
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) -> Vec<Annotatable> {
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if !ecx.ecfg.enable_custom_test_frameworks() {
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feature_gate::emit_feature_err(&ecx.parse_sess,
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sym::custom_test_frameworks,
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attr_sp,
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feature_gate::GateIssue::Language,
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feature_gate::EXPLAIN_CUSTOM_TEST_FRAMEWORKS);
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}
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if !ecx.ecfg.should_test { return vec![]; }
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let sp = {
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let mark = Mark::fresh(Mark::root());
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mark.set_expn_info(ExpnInfo {
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call_site: DUMMY_SP,
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def_site: None,
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format: MacroAttribute(sym::test_case),
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allow_internal_unstable: Some(vec![sym::test, sym::rustc_attrs].into()),
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allow_internal_unsafe: false,
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local_inner_macros: false,
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edition: ecx.parse_sess.edition,
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});
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attr_sp.with_ctxt(SyntaxContext::empty().apply_mark(mark))
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};
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let mut item = anno_item.expect_item();
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item = item.map(|mut item| {
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item.vis = respan(item.vis.span, ast::VisibilityKind::Public);
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item.ident = item.ident.gensym();
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item.attrs.push(
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ecx.attribute(sp,
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ecx.meta_word(sp, sym::rustc_test_marker))
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);
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item
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});
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return vec![Annotatable::Item(item)]
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}
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