/*
* 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.js.rhino.EvaluatorException;
import com.google.gwt.dev.js.rhino.TokenStream;
import junit.framework.TestCase;
import java.io.IOException;
import java.io.StringReader;
/**
* Tests class {@link TokenStream}.
*/
public class TokenStreamTest extends TestCase {
private static class Token {
final String text;
final int type;
public Token(int type, String text) {
this.type = type;
this.text = text;
}
}
private static Token scanToken(String tokenString) throws EvaluatorException,
IOException {
TokenStream tokStream = new TokenStream(new StringReader(tokenString),
"test input", 1);
int type = tokStream.getToken();
String text = tokStream.getString();
return new Token(type, text);
}
public void testJsniRefs() throws IOException {
// Field refs
assertGoodJsni("@org.group.Foo::bar");
// Method refs
assertGoodJsni("@org.group.Foo::bar()");
assertGoodJsni("@org.group.Foo::bar(I)");
assertGoodJsni("@org.group.Foo::bar(IJ)");
assertGoodJsni("@org.group.Foo::bar(Lorg/group/Foo;)");
assertGoodJsni("@org.group.Foo::bar(Lorg/group/Foo;Lorg/group/Bar;)");
assertGoodJsni("@org.group.Foo::bar([I)");
// The following is currently tolerated
// assertBadJsni("@org.group.Foo::bar(Lorg/group/Foo)");
assertBadJsni("@org.group.Foo::bar(A)");
assertBadJsni("@org.group.Foo::bar(L)");
// Method refs with * as the parameter list
assertGoodJsni("@org.group.Foo::bar(*)");
assertBadJsni("@org.group.Foo::bar(*");
// References to default or imported class
assertGoodJsni("@Foo::bar");
// Refs that span lines
assertGoodJsni("@org.group.Foo::bar(\nLorg/group/Foo;)");
assertGoodJsni("@org.group.Foo::bar(\nLorg/group/Foo;\n)");
assertGoodJsni("@org.group.Foo::bar(\n[I\n)");
assertGoodJsni("@org.group.Foo::bar(\nZ\nZ\n)");
assertGoodJsni("@org.group.Foo::bar(\nLorg/group/Foo;\nZ)");
assertGoodJsni("@org.group.Foo::\nbar()");
assertBadJsni("@org.group.Foo::bar(\nLorg/group/Foo;,\nZ)");
assertBadJsni("@org.group.Foo::bar(\nLorg/group/Foo,\nZ)");
// bad references
assertBadJsni("@");
assertBadJsni("@org.group.Foo.bar");
assertBadJsni("@org.group.Foo:");
assertBadJsni("@org.group.Foo::");
assertBadJsni("@org.group.Foo::(");
assertBadJsni("@::bar()");
assertBadJsni("@bar");
}
private void assertBadJsni(String token) throws IOException {
try {
scanToken(token);
fail("Expected a token scanning error for " + token);
} catch (EvaluatorException e) {
// expected
}
}
private void assertGoodJsni(String jsniRef) throws IOException {
Token token = scanToken(jsniRef);
assertEquals(TokenStream.NAME, token.type);
// The token.text won't have any whitespace included.
assertEquals(jsniRef.replaceAll("\\s", ""), token.text);
}
}