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// http://rust-lang.org/COPYRIGHT.
//
// #[test_case] is used by custom test authors to mark tests
// When building for test, it needs to make the item public and gensym the name
// Otherwise, we'll omit the item. This behavior means that any item annotated
// with #[test_case] is never addressable.
//
// We mark item with an inert attribute "rustc_test_marker" which the test generation
// logic will pick up on.
use syntax::ext::base::*;
use syntax::ext::build::AstBuilder;
use syntax::ext::hygiene::{Mark, SyntaxContext};
use syntax::ast;
use syntax::source_map::respan;
use syntax::symbol::sym;
use syntax_pos::Span;
use syntax::source_map::{ExpnInfo, MacroAttribute};
use syntax::feature_gate;
pub fn expand(
ecx: &mut ExtCtxt<'_>,
attr_sp: Span,
_meta_item: &ast::MetaItem,
anno_item: Annotatable
) -> Vec<Annotatable> {
if !ecx.ecfg.enable_custom_test_frameworks() {
feature_gate::emit_feature_err(&ecx.parse_sess,
sym::custom_test_frameworks,
attr_sp,
feature_gate::GateIssue::Language,
feature_gate::EXPLAIN_CUSTOM_TEST_FRAMEWORKS);
}
if !ecx.ecfg.should_test { return vec![]; }
let sp = {
let mark = Mark::fresh(Mark::root());
mark.set_expn_info(ExpnInfo::with_unstable(
MacroAttribute(sym::test_case), attr_sp, ecx.parse_sess.edition,
&[sym::test, sym::rustc_attrs],
));
attr_sp.with_ctxt(SyntaxContext::empty().apply_mark(mark))
};
let mut item = anno_item.expect_item();
item = item.map(|mut item| {
item.vis = respan(item.vis.span, ast::VisibilityKind::Public);
item.ident = item.ident.gensym();
item.attrs.push(
ecx.attribute(sp,
ecx.meta_word(sp, sym::rustc_test_marker))
);
item
});
return vec![Annotatable::Item(item)]
}
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