90 lines
2.9 KiB
Java
90 lines
2.9 KiB
Java
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/*
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* Copyright 2006 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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* Tests for variable declaration collapsing.
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*
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*/
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public class CollapseVariableDeclarationsTest extends CompilerTestCase {
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public void testCollapsing() throws Exception {
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// Basic collapsing
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test("var a;var b;",
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"var a,b;");
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// With initial values
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test("var a = 1;var b = 1;",
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"var a=1,b=1;");
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// Already collapsed
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test("var a, b;",
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"var a,b;");
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// Already collapsed with values
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test("var a = 1, b = 1;",
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"var a=1,b=1;");
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// Some already collapsed
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test("var a;var b, c;var d;",
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"var a,b,c,d;");
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// Some already collapsed with values
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test("var a = 1;var b = 2, c = 3;var d = 4;",
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"var a=1,b=2,c=3,d=4;");
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}
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public void testIssue820() throws Exception {
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// Don't redeclare function parameters, this is incompatible with
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// strict mode.
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testSame("function f(a){ var b=1; a=2; var c; }");
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}
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public void testIfElseVarDeclarations() throws Exception {
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testSame("if (x) var a = 1; else var b = 2;");
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}
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public void testAggressiveRedeclaration() {
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test("var x = 2; foo(x); x = 3; var y = 2;",
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"var x = 2; foo(x); var x = 3, y = 2;");
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test("var x = 2; foo(x); x = 3; x = 1; var y = 2;",
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"var x = 2; foo(x); var x = 3, x = 1, y = 2;");
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test("var x = 2; foo(x); x = 3; x = 1; var y = 2; var z = 4",
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"var x = 2; foo(x); var x = 3, x = 1, y = 2, z = 4");
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test("var x = 2; foo(x); x = 3; x = 1; var y = 2; var z = 4; x = 5",
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"var x = 2; foo(x); var x = 3, x = 1, y = 2, z = 4, x = 5");
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}
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public void testAggressiveRedeclarationInFor() {
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testSame("for(var x = 1; x = 2; x = 3) {x = 4}");
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testSame("for(var x = 1; y = 2; z = 3) {var a = 4}");
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testSame("var x; for(x = 1; x = 2; z = 3) {x = 4}");
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}
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public void testIssue397() {
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test("var x; var y = 3; x = 5;",
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"var x, y = 3; x = 5;");
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testSame("var x; x = 5; var z = 7;");
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test("var x; var y = 3; x = 5; var z = 7;",
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"var x, y = 3; x = 5; var z = 7;");
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test("var a = 1; var x; var y = 3; x = 5;",
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"var a = 1, x, y = 3; x = 5;");
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}
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@Override
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protected CompilerPass getProcessor(Compiler compiler) {
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return new CollapseVariableDeclarations(compiler);
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}
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}
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