128 lines
4.4 KiB
Java
128 lines
4.4 KiB
Java
/*
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* Copyright 2009 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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import com.google.javascript.jscomp.Normalize.NormalizeStatements;
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import com.google.javascript.rhino.Node;
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/**
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* @author johnlenz@google.com (John Lenz)
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*
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*/
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public class DenormalizeTest extends CompilerTestCase {
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@Override
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public CompilerPass getProcessor(final Compiler compiler) {
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return new NormalizeAndDenormalizePass(compiler);
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}
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@Override
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protected int getNumRepetitions() {
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// The normalize pass is only run once.
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return 1;
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}
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public void testFor() {
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// Verify assignments are moved into the FOR init node.
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test("a = 0; for(; a < 2 ; a++) foo()",
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"for(a = 0; a < 2 ; a++) foo();");
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// Verify vars are are moved into the FOR init node.
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test("var a = 0; for(; c < b ; c++) foo()",
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"for(var a = 0; c < b ; c++) foo()");
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// We don't handle labels yet.
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testSame("var a = 0; a:for(; c < b ; c++) foo()");
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testSame("var a = 0; a:b:for(; c < b ; c++) foo()");
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// Verify FOR inside IFs.
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test("if(x){var a = 0; for(; c < b; c++) foo()}",
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"if(x){for(var a = 0; c < b; c++) foo()}");
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// Any other expression.
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test("init(); for(; a < 2 ; a++) foo()",
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"for(init(); a < 2 ; a++) foo();");
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// Other statements are left as is.
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test("function f(){ var a; for(; a < 2 ; a++) foo() }",
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"function f(){ for(var a; a < 2 ; a++) foo() }");
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testSame("function f(){ return; for(; a < 2 ; a++) foo() }");
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}
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public void testForIn() {
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test("var a; for(a in b) foo()", "for (var a in b) foo()");
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testSame("a = 0; for(a in b) foo()");
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testSame("var a = 0; for(a in b) foo()");
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// We don't handle labels yet.
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testSame("var a; a:for(a in b) foo()");
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testSame("var a; a:b:for(a in b) foo()");
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// Verify FOR inside IFs.
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test("if(x){var a; for(a in b) foo()}",
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"if(x){for(var a in b) foo()}");
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// Any other expression.
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testSame("init(); for(a in b) foo()");
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// Other statements are left as is.
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testSame("function f(){ return; for(a in b) foo() }");
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}
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public void testInOperatorNotInsideFor() {
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// in operators shouldn't be moved into for loops.
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// Some JavaScript interpreters (such as the NetFront Access browser
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// embedded in the PlayStation 3) will not parse an in operator in
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// a for loop, even if it's protected by parentheses.
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// Make sure the in operator doesn't get moved into the for loop.
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testSame("function f(){ var a; var i=\"length\" in a;" +
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"for(; a < 2 ; a++) foo() }");
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// Same, but with parens around the operator.
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testSame("function f(){ var a; var i=(\"length\" in a);" +
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"for(; a < 2 ; a++) foo() }");
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// Make sure Normalize yanks the variable initializer out, and
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// Denormalize doesn't put it back.
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test("function f(){" +
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"var b,a=0; for (var i=(\"length\" in b);a<2; a++) foo()}",
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"function f(){var b; var a=0;var i=(\"length\" in b);" +
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"for (;a<2;a++) foo()}");
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}
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/**
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* Create a class to combine the Normalize and Denormalize passes.
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* This is needed because the enableNormalize() call on CompilerTestCase
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* causes normalization of the result *and* the expected string, and
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* we really don't want the compiler twisting the expected code around.
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*/
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public class NormalizeAndDenormalizePass implements CompilerPass {
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Denormalize denormalizePass;
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NormalizeStatements normalizePass;
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AbstractCompiler compiler;
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public NormalizeAndDenormalizePass(AbstractCompiler compiler) {
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this.compiler = compiler;
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denormalizePass = new Denormalize(compiler);
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normalizePass = new NormalizeStatements(compiler, false);
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}
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@Override
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public void process(Node externs, Node root) {
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NodeTraversal.traverse(compiler, root, normalizePass);
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NodeTraversal.traverse(compiler, root, denormalizePass);
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}
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}
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}
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