173 lines
6.3 KiB
Java
173 lines
6.3 KiB
Java
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/*
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* Copyright 2011 The Closure Compiler Authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.google.javascript.jscomp;
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/**
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* Unit tests for {@link RescopeGlobalSymbols}
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*
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*/
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public class RescopeGlobalSymbolsTest extends CompilerTestCase {
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private final String namespace = "_";
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public RescopeGlobalSymbolsTest() {
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}
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@Override protected CompilerPass getProcessor(Compiler compiler) {
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return new RescopeGlobalSymbols(compiler, namespace, false);
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}
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@Override
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protected int getNumRepetitions() {
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return 1;
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}
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public void testVarDeclarations() {
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test("var a = 1;", "_.a = 1;");
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test("var a = 1, b = 2, c = 3;", "_.a = 1; _.b = 2; _.c = 3;");
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test("var a = 'str', b = 1, c = { foo: 'bar' }, d = function() {};",
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"_.a = 'str'; _.b = 1; _.c = { foo: 'bar' }; _.d = function() {};");
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test("if(1){var x = 1;}", "if(1){_.x = 1;}");
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test("var x;", "");
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test("var a, b = 1;", "_.b = 1");
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}
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public void testForLoops() {
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test("for (var i = 0; i < 1000; i++);",
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"for (_.i = 0; _.i < 1000; _.i++);");
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test("for (var i = 0, c = 2; i < 1000; i++);",
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"for (_.i = 0, _.c = 2; _.i < 1000; _.i++);");
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test("for (var i = 0, c = 2, d = 3; i < 1000; i++);",
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"for (_.i = 0, _.c = 2, _.d = 3; _.i < 1000; _.i++);");
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test("for (var i = 0, c = 2, d = 3, e = 4; i < 1000; i++);",
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"for (_.i = 0, _.c = 2, _.d = 3, _.e = 4; _.i < 1000; _.i++);");
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test("for (var i = 0; i < 1000;)i++;",
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"for (_.i = 0; _.i < 1000;)_.i++;");
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test("for (var i = 0,b; i < 1000;)i++;b++",
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"for (_.i = 0,_.b; _.i < 1000;)_.i++;_.b++");
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test("var o={};for (var i in o)i++;",
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"_.o={};for (_.i in _.o)_.i++;");
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}
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public void testFunctionStatements() {
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test("function test(){}",
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"_.test=function (){}");
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test("if(1)function test(){}",
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"if(1)_.test=function (){}");
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new StringCompare().testFreeCallSemantics();
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}
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public void testDeeperScopes() {
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test("var a = function(b){return b}",
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"_.a = function(b){return b}");
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test("var a = function(b){var a; return a+b}",
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"_.a = function(b){var a; return a+b}");
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test("var a = function(a,b){return a+b}",
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"_.a = function(a,b){return a+b}");
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test("var x=1,a = function(b){var a; return a+b+x}",
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"_.x=1;_.a = function(b){var a; return a+b+_.x}");
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test("var x=1,a = function(b){return function(){var a;return a+b+x}}",
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"_.x=1;_.a = function(b){return function(){var a; return a+b+_.x}}");
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}
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public void testTryCatch() {
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test("try{var a = 1}catch(e){throw e}",
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"try{_.a = 1}catch(e){throw e}");
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}
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public void testShadow() {
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test("var _ = 1; (function () { _ = 2 })()",
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"_._ = 1; (function () { _._ = 2 })()");
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test("function foo() { var _ = {}; _.foo = foo; _.bar = 1; }",
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"_.foo = function () { var _$ = {}; _$.foo = _.foo; _$.bar = 1}");
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test("function foo() { var _ = {}; _.foo = foo; _.bar = 1; " +
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"(function() { var _ = 0;})() }",
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"_.foo = function () { var _$ = {}; _$.foo = _.foo; _$.bar = 1; " +
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"(function() { var _$ = 0;})() }");
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test("function foo() { var _ = {}; _.foo = foo; _.bar = 1; " +
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"var _$ = 1; }",
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"_.foo = function () { var _$ = {}; _$.foo = _.foo; _$.bar = 1; " +
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"var _$$ = 1; }");
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test("function foo() { var _ = {}; _.foo = foo; _.bar = 1; " +
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"var _$ = 1; (function() { _ = _$ })() }",
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"_.foo = function () { var _$ = {}; _$.foo = _.foo; _$.bar = 1; " +
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"var _$$ = 1; (function() { _$ = _$$ })() }");
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test("function foo() { var _ = {}; _.foo = foo; _.bar = 1; " +
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"var _$ = 1, _$$ = 2 (function() { _ = _$ = _$$; " +
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"var _$, _$$$ })() }",
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"_.foo = function () { var _$ = {}; _$.foo = _.foo; _$.bar = 1; " +
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"var _$$ = 1, _$$$ = 2 (function() { _$ = _$$ = _$$$; " +
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"var _$$, _$$$$ })() }");
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test("function foo() { var _a = 1;}",
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"_.foo = function () { var _a = 1;}");
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// We accept this unnecessary renaming as acceptable to simplify pattern
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// matching in the traversal.
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test("function foo() { var _$a = 1;}",
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"_.foo = function () { var _$a$ = 1;}");
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}
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public void testExterns() {
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test("var document;",
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"document",
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"window.document", null, null);
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test("var document;",
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"document.getElementsByTagName('test')",
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"window.document.getElementsByTagName('test')", null, null);
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test("var document;",
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"window.document.getElementsByTagName('test')",
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"window.document.getElementsByTagName('test')", null, null);
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test("var document;document.getElementsByTagName",
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"document.getElementsByTagName('test')",
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"window.document.getElementsByTagName('test')", null, null);
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test("var document,navigator",
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"document.navigator;navigator",
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"window.document.navigator;window.navigator", null, null);
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test("var iframes",
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"function test() { iframes.resize(); }",
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"_.test = function() { window.iframes.resize(); }", null, null);
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test("var iframes",
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"var foo = iframes;",
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"_.foo = window.iframes;", null, null);
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// Special names.
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test("var arguments, window, eval;",
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"arguments;window;eval;",
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"arguments;window;eval;", null, null);
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// Actually not an extern.
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test("",
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"document",
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"window.document", null, null);
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}
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private class StringCompare extends CompilerTestCase {
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StringCompare() {
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super("", false);
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}
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@Override protected CompilerPass getProcessor(Compiler compiler) {
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return new RescopeGlobalSymbols(compiler, namespace, false);
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}
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public void testFreeCallSemantics() {
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test("function x(){};var y=function(){var val=x()||{}}",
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"_.x=function(){};_.y=function(){var val=(0,_.x)()||{}}");
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test("function x(){x()}",
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"_.x=function(){(0,_.x)()}");
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}
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}
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}
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