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fix corner case in --reduce-test (#3819)

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This commit is contained in:
Alex Lam S.L
2020-04-24 23:49:50 +01:00
committed by GitHub
parent 44d6912a55
commit 94f33570e3
4 changed files with 33 additions and 25 deletions
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47
test/reduce.js
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@@ -1,5 +1,5 @@
var crypto = require("crypto");
var U = require("./node");
var U = require("..");
var List = U.List;
var os = require("os");
var sandbox = require("./sandbox");
@@ -24,6 +24,10 @@ module.exports = function reduce_test(testcase, minify_options, reduce_options)
reduce_options = reduce_options || {};
var max_iterations = reduce_options.max_iterations || 1000;
var max_timeout = reduce_options.max_timeout || 10000;
var warnings = [];
var log = reduce_options.log || function(msg) {
warnings.push(msg);
};
var verbose = reduce_options.verbose;
var minify_options_json = JSON.stringify(minify_options, null, 2);
var result_cache = Object.create(null);
@@ -31,7 +35,7 @@ module.exports = function reduce_test(testcase, minify_options, reduce_options)
var differs = producesDifferentResultWhenMinified(result_cache, testcase, minify_options, max_timeout);
if (verbose) {
console.error("// Node.js " + process.version + " on " + os.platform() + " " + os.arch());
log("// Node.js " + process.version + " on " + os.platform() + " " + os.arch());
}
if (!differs) {
// same stdout result produced when minified
@@ -39,16 +43,19 @@ module.exports = function reduce_test(testcase, minify_options, reduce_options)
code: [
"// Can't reproduce test failure",
"// minify options: " + to_comment(minify_options_json)
].join("\n")
].join("\n"),
warnings: warnings,
};
} else if (differs.timed_out) {
return {
code: [
"// Can't reproduce test failure within " + max_timeout + "ms",
"// minify options: " + to_comment(minify_options_json)
].join("\n")
].join("\n"),
warnings: warnings,
};
} else if (differs.error) {
differs.warnings = warnings;
return differs;
} else if (is_error(differs.unminified_result)
&& is_error(differs.minified_result)
@@ -57,7 +64,8 @@ module.exports = function reduce_test(testcase, minify_options, reduce_options)
code: [
"// No differences except in error message",
"// minify options: " + to_comment(minify_options_json)
].join("\n")
].join("\n"),
warnings: warnings,
};
} else {
max_timeout = Math.min(100 * differs.elapsed, max_timeout);
@@ -414,10 +422,7 @@ module.exports = function reduce_test(testcase, minify_options, reduce_options)
// only difference detected is in error message, so expose that and try again
testcase_ast.transform(new U.TreeTransformer(function(node, descend) {
if (node.TYPE == "Call" && node.expression.print_to_string() == "console.log") {
return new U.AST_Sequence({
expressions: node.args,
start: {},
});
return to_sequence(node.args);
}
if (node instanceof U.AST_Catch) {
descend(node, this);
@@ -443,11 +448,8 @@ module.exports = function reduce_test(testcase, minify_options, reduce_options)
node.start._permute = 0;
}));
for (var c = 0; c < max_iterations; ++c) {
if (verbose) {
if (pass == 1 && c % 25 == 0) {
console.error("// reduce test pass "
+ pass + ", iteration " + c + ": " + testcase.length + " bytes");
}
if (verbose && pass == 1 && c % 25 == 0) {
log("// reduce test pass " + pass + ", iteration " + c + ": " + testcase.length + " bytes");
}
var CHANGED = false;
var code_ast = testcase_ast.clone(true).transform(tt);
@@ -457,9 +459,9 @@ module.exports = function reduce_test(testcase, minify_options, reduce_options)
} catch (ex) {
// AST is not well formed.
// no harm done - just log the error, ignore latest change and continue iterating.
console.error("*** Error generating code from AST.");
console.error(ex);
console.error("*** Discarding permutation and continuing.");
log("*** Error generating code from AST.");
log(ex.stack);
log("*** Discarding permutation and continuing.");
continue;
}
var diff = producesDifferentResultWhenMinified(result_cache, code, minify_options, max_timeout);
@@ -470,10 +472,10 @@ module.exports = function reduce_test(testcase, minify_options, reduce_options)
} else if (diff.error) {
// something went wrong during minify() - could be malformed AST or genuine bug.
// no harm done - just log code & error, ignore latest change and continue iterating.
console.error("*** Error during minification.");
console.error(code);
console.error(diff.error);
console.error("*** Discarding permutation and continuing.");
log("*** Error during minification.");
log(code);
log(diff.error.stack);
log("*** Discarding permutation and continuing.");
} else if (is_error(diff.unminified_result)
&& is_error(diff.minified_result)
&& diff.unminified_result.name == diff.minified_result.name) {
@@ -489,7 +491,7 @@ module.exports = function reduce_test(testcase, minify_options, reduce_options)
}
if (c == 0) break;
if (verbose) {
console.error("// reduce test pass " + pass + ": " + testcase.length + " bytes");
log("// reduce test pass " + pass + ": " + testcase.length + " bytes");
}
}
testcase = try_beautify(result_cache, testcase, minify_options, differs.unminified_result, max_timeout);
@@ -510,6 +512,7 @@ module.exports = function reduce_test(testcase, minify_options, reduce_options)
}
lines.push("// options: " + to_comment(minify_options_json));
testcase.code += lines.join("\n");
testcase.warnings = warnings;
return testcase;
}
};