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support limited ufuzz testing for export (#4693)

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fixes #4692
This commit is contained in:
Alex Lam S.L
2021-02-26 20:56:34 +00:00
committed by GitHub
parent ac26993b5a
commit ba4a771bbc
7 changed files with 166 additions and 47 deletions
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14
test/reduce.js
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@@ -132,6 +132,11 @@ module.exports = function reduce_test(testcase, minify_options, reduce_options)
return;
}
if (parent instanceof U.AST_VarDef && parent.name === node) return;
// preserve exports
if (parent instanceof U.AST_ExportDeclaration) return;
if (parent instanceof U.AST_ExportDefault) return;
if (parent instanceof U.AST_ExportForeign) return;
if (parent instanceof U.AST_ExportReferences) return;
// preserve for (var xxx; ...)
if (parent instanceof U.AST_For && parent.init === node && node instanceof U.AST_Definitions) return node;
// preserve for (xxx in/of ...)
@@ -455,6 +460,13 @@ module.exports = function reduce_test(testcase, minify_options, reduce_options)
return List.skip;
}
// preserve sole definition of an export statement
if (node instanceof U.AST_VarDef
&& parent.definitions.length == 1
&& tt.parent(1) instanceof U.AST_ExportDeclaration) {
return node;
}
// remove this node unless its the sole element of a (transient) sequence
if (!(parent instanceof U.AST_Sequence) || parent.expressions.length > 1) {
node.start._permute++;
@@ -720,7 +732,7 @@ function run_code(code, toplevel, result_cache, timeout) {
if (!value) {
var start = Date.now();
result_cache[key] = value = {
result: sandbox.run_code(code, toplevel, timeout),
result: sandbox.run_code(sandbox.strip_exports(code), toplevel, timeout),
elapsed: Date.now() - start,
};
}