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/*
* Copyright 2009 The Closure Compiler Authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.google.javascript.jscomp;
import com.google.javascript.jscomp.CheckLevel;
import com.google.javascript.jscomp.type.SemanticReverseAbstractInterpreter;
import com.google.javascript.rhino.Node;
/**
* Tests for {@link RemoveUnusedPrototypeProperties}.
*
* @author nicksantos@google.com (Nick Santos)
*/
public class RemoveUnusedNamesTest extends CompilerTestCase {
private static final String EXTERNS =
"/** @constructor */\n " +
"function IFoo() { } \n" +
"IFoo.prototype.bar; \n" +
"/** @constructor */\n " +
"var mExtern; \n" +
"mExtern.bExtern; \n" +
"mExtern['cExtern']; \n";
public RemoveUnusedNamesTest() {
super(EXTERNS);
}
private boolean canRemoveExterns = false;
@Override
protected int getNumRepetitions() {
return 1;
}
@Override
protected CompilerPass getProcessor(final Compiler compiler) {
return new CompilerPass() {
@Override
public void process(Node externs, Node root) {
new TypeCheck(compiler,
new SemanticReverseAbstractInterpreter(
compiler.getCodingConvention(),
compiler.getTypeRegistry()),
compiler.getTypeRegistry(),
CheckLevel.ERROR,
CheckLevel.ERROR).processForTesting(externs, root);
new RemoveUnusedNames(
compiler, canRemoveExterns).process(externs, root);
// Use to remove side-effect-free artifacts that are left over.
new UnreachableCodeElimination(compiler, true).process(externs, root);
}
};
}
@Override
public void setUp() {
canRemoveExterns = false;
}
public void testAnalyzeUnusedPrototypeProperties() {
// Basic removal for prototype properties
test("/** @constructor */ \n" +
"function e(){} \n" +
"e.prototype.a = function(){};" +
"e.prototype.b = function(){};" +
"var x = new e; x.a()",
"function e(){}" +
" e.prototype.a = function(){};" +
"var x = new e; x.a()");
}
public void testAnalyzeUnusedPrototypeProperties2() {
// TODO(user): Prototype literal not yet supported.
// Basic removal for prototype replacement
//test("/** @constructor */ \n" +
// "function e(){} \n" +
// "e.prototype = {a: function(){}, b: function(){}};" +
// "var x=new e; x.a()",
//
// "function e(){}" +
// "e.prototype = {a: function(){}};" +
// "var x = new e; x.a()");
}
public void testAnalyzeUnusedPrototypeProperties3() {
// Even if bExtern is out there somewhere. The type system tells us they
// are unrelated.
test("/** @constructor */ \n" +
"function e(){} \n" +
"e.prototype.a = function(){};" +
"e.prototype.bExtern = function(){};" +
"var x = new e;x.a()",
"function e(){}" +
"e.prototype.a = function(){};" +
//"e.prototype.bExtern = function(){};" +
"var x = new e; x.a()");
// TODO(user): Prototype literal not yet supported.
//test("/** @constructor */ \n" +
// "function e(){} \n" +
// "e.prototype = {a: function(){}, bExtern: function(){}};" +
// "var x = new e; x.a()",
// "function e(){}" +
// "e.prototype = {a: function(){}, bExtern: function(){}};" +
// "var x = new e; x.a()");
}
public void testAliasing() {
// TODO(user): Not fully supported.
}
public void testStatement() {
test("/**\n" +
" * @fileoverview\n" +
" * @notypecheck\n" +
" */ \n" +
"/** @constructor */" +
"function e(){}" +
"var x = e.prototype.method1 = function(){};" +
"var y = new e; x()",
"function e(){}" +
"var x = function(){};" +
"var y = new e; x()");
}
public void testExportedMethodsByNamingConvention() {
// TODO(user): Not fully supported.
}
public void testExportedMethodsByNamingConventionAlwaysExported() {
// TODO(user): Not fully supported.
}
}
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