/*
* Copyright 2009 Google Inc.
*
* 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.gwt.dev.js;
import com.google.gwt.dev.jjs.SourceOrigin;
import com.google.gwt.dev.js.ast.JsProgram;
import com.google.gwt.dev.js.ast.JsStatement;
import com.google.gwt.dev.js.ast.JsVisitor;
import com.google.gwt.dev.util.DefaultTextOutput;
import com.google.gwt.dev.util.TextOutput;
import junit.framework.TestCase;
import java.io.StringReader;
import java.lang.reflect.Method;
import java.util.List;
/**
* A utility base type for writing tests for JS optimizers.
*/
public abstract class OptimizerTestBase extends TestCase {
/**
* Optimize a JS program.
*
* @param js the source program
* @param toExec a list of classes that implement
* <code>static void exec(JsProgram)</code>
* @return optimized JS
*/
protected String optimize(String js, Class<?>... toExec) throws Exception {
JsProgram program = new JsProgram();
List<JsStatement> expected = JsParser.parse(SourceOrigin.UNKNOWN,
program.getScope(), new StringReader(js));
program.getGlobalBlock().getStatements().addAll(expected);
for (Class<?> clazz : toExec) {
Method m = clazz.getMethod("exec", JsProgram.class);
m.invoke(null, program);
}
TextOutput text = new DefaultTextOutput(true);
JsVisitor generator = new JsSourceGenerationVisitor(text);
generator.accept(program);
return text.toString();
}
}