package?org.gradle;

import?java.io.StringReader;
import?org.junit.Test;
import?static?org.junit.Assert.*;
import?org.antlr.runtime.CommonTokenStream;
import?org.antlr.runtime.ANTLRStringStream;
public?class?GrammarTest?{
????@Test
????public?void?canUseGeneratedGrammar（）?throws?Exception?{
????????ANTLRStringStream?in?=?new?ANTLRStringStream（“1+2“）;
????????CalculatorLexer?lexer?=?new?CalculatorLexer（in）;
????????CommonTokenStream?tokens?=?new?CommonTokenStream（lexer）;
????????CalculatorParser?parser?=?new?CalculatorParser（tokens）;
????????parser.add（）;
????}
}