/**
* Test for one of the bugs causing issue 8284. JsObfuscateNamer was used to assign obfuscated
* names to deduped functions and as a result it might have modified the other names that had been
* assigned invalidating the irrevocable decision made by the deduper.
*/
public void testRerunNamerError() throws Exception {
JsProgram program = new JsProgram();
// Reference to a in _.b is to the top level scope a function where the one in _.c is to the
// local a definition.
//
// After deduping _.b and _.c the identifier a in the deduped function points to the top level
// scope a function and runing a namer afterwards makes the deduping invalid.
// CAVEAT: The two functions that have {return a;} as their bodies are not actually duplicates
// but we use them to model functions that refer to names at different scopes. Because this
// optimization only runs on JsFunctions that come from Java source this situation does not
// happen.
String js =
"var c; function a(){return f1;}; function f1() {_.b = function() {return a;} }; "
+ "function f2() { var a = null; _.c = function() {return a;} };f1();f2();_.b();_.c();";
List<JsStatement> input =
JsParser.parse(SourceOrigin.UNKNOWN, program.getScope(), new StringReader(js));
program.getGlobalBlock().getStatements().addAll(input);
// Mark all functions as if they were translated from Java sources.
setAllFromJava(program);
// Get the JsNames for the top level a and the f2() scoped a.
JsName topScope_a = program.getScope().findExistingName("a");
JsName f2_a = null;
for (JsScope scope : program.getScope().getChildren()) {
if (scope.toString().startsWith("function f2->")) {
f2_a = scope.findExistingName("a");
}
}
assertTrue(topScope_a != f2_a);
optimize(program, JsSymbolResolver.class, JsDuplicateFunctionRemoverProxy.class);
// collect values assigned to some identifiers.
final Map<String, JsName> assignments = AssignmentGatherer.exec(program);
// If the function have been dedupped then there is a constraint that the different JsNames
// they referred to are obfuscated to the same id.
// Hence if _.c and _.b are collapsed the top scope name "a" and the one in f2() need to remain
// the same.
assertTrue(
assignments.get("_.b") != assignments.get("_.c")
|| topScope_a.getShortIdent().equals(f2_a.getShortIdent()));
}
public void testVirtualRemoveDuplicates() throws Exception {
JsProgram program = new JsProgram();
String js = "_.method1=function(){};_.method2=function(){};_.method1();_.method2();";
List<JsStatement> input =
JsParser.parse(SourceOrigin.UNKNOWN, program.getScope(), new StringReader(js));
program.getGlobalBlock().getStatements().addAll(input);
// Mark all functions as if they were translated from Java sources.
setAllFromJava(program);
String firstName = new MockNameGenerator().getFreshName();
assertEquals(
"_.method1="
+ firstName
+ ";_.method2="
+ firstName
+ ";_.method1();_.method2();function "
+ firstName
+ "(){}\n",
optimize(program, JsSymbolResolver.class, JsDuplicateFunctionRemoverProxy.class));
}