112 lines
3 KiB
Java
112 lines
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 StatementFusion}.
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*
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*/
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public class StatementFusionTest extends CompilerTestCase {
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@Override
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public void setUp() throws Exception {
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super.setUp();
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enableLineNumberCheck(true);
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}
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@Override
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public CompilerPass getProcessor(final Compiler compiler) {
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PeepholeOptimizationsPass peepholePass =
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new PeepholeOptimizationsPass(compiler, new StatementFusion());
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return peepholePass;
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}
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public void testNothingToDo() {
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fuseSame("");
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fuseSame("a");
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fuseSame("a()");
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fuseSame("if(a()){}");
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}
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public void testFoldBlockWithStatements() {
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fuse("a;b;c", "a,b,c");
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fuse("a();b();c();", "a(),b(),c()");
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fuse("a(),b();c(),d()", "a(),b(),c(),d()");
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fuse("a();b(),c(),d()", "a(),b(),c(),d()");
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fuse("a(),b(),c();d()", "a(),b(),c(),d()");
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}
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public void testFoldBlockIntoIf() {
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fuse("a;b;c;if(x){}", "if(a,b,c,x){}");
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fuse("a;b;c;if(x,y){}else{}", "if(a,b,c,x,y){}else{}");
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fuse("a;b;c;if(x,y){}", "if(a,b,c,x,y){}");
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fuse("a;b;c;if(x,y,z){}", "if(a,b,c,x,y,z){}");
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// Can't fuse if there are statements after the IF.
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fuseSame("a();if(a()){}a()");
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}
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public void testFoldBlockReturn() {
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fuse("a;b;c;return x", "return a,b,c,x");
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fuse("a;b;c;return x+y", "return a,b,c,x+y");
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// DeadAssignmentElimination would have cleaned it up anyways.
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fuseSame("a;b;c;return x;a;b;c");
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}
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public void testFoldBlockThrow() {
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fuse("a;b;c;throw x", "throw a,b,c,x");
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fuse("a;b;c;throw x+y", "throw a,b,c,x+y");
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fuseSame("a;b;c;throw x;a;b;c");
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}
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public void testFoldSwitch() {
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fuse("a;b;c;switch(x){}", "switch(a,b,c,x){}");
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}
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public void testFuseIntoForIn() {
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fuse("a;b;c;for(x in y){}", "for(x in a,b,c,y){}");
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fuseSame("a();for(var x = b() in y){}");
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}
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public void testNoFuseIntoWhile() {
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fuseSame("a;b;c;while(x){}");
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}
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public void testNoFuseIntoDo() {
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fuseSame("a;b;c;do{}while(x)");
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}
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public void testNoGlobalSchopeChanges() {
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testSame("a,b,c");
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}
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public void testNoFunctionBlockChanges() {
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testSame("function foo() { a,b,c }");
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}
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private void fuse(String before, String after) {
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test("function F(){if(CONDITION){" + before + "}}",
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"function F(){if(CONDITION){" + after + "}}");
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}
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private void fuseSame(String code) {
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fuse(code, code);
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}
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}
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