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/*
* Copyright 2008 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.rhino.Node;
import junit.framework.TestCase;
/**
* Unit test for {@link InlineCostEstimator}.
* @author johnlenz@google.com (John Lenz)
*/
public class InlineCostEstimatorTest extends TestCase {
static Node parse(String js) {
Compiler compiler = new Compiler();
Node n = compiler.parseTestCode(js);
assertEquals(0, compiler.getErrorCount());
return n;
}
static String minimize(String js) {
CompilerOptions options = new CompilerOptions();
options.setLineLengthThreshold(Integer.MAX_VALUE);
return new CodePrinter.Builder(parse(js)).
setCompilerOptions(options).
build();
}
static long cost(String js) {
return InlineCostEstimator.getCost(parse(js));
}
public void testCost() {
checkCost("1", "1");
checkCost("true", "1");
checkCost("false", "1");
checkCost("a", "xx");
checkCost("a + b", "xx+xx");
checkCost("foo()", "xx()");
checkCost("foo(a,b)", "xx(xx,xx)");
checkCost("10 + foo(a,b)", "0+xx(xx,xx)");
checkCost("1 + foo(a,b)", "1+xx(xx,xx)");
checkCost("a ? 1 : 0", "xx?1:0");
checkCost("a.b", "xx.xx");
checkCost("new Obj()", "new xx");
checkCost("function a() {return \"monkey\"}",
"function xx(){return\"monkey\"}");
}
private void checkCost(String source, String example) {
// The example string should have been minified already.
assertEquals(minimize(example), example);
// cost estimate should be the same as the length of the example string.
assertEquals(example.length(), cost(source));
}
}
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