test/nashorn/src/jdk/nashorn/api/tree/test/JDK_8193296_Test.java

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package jdk.nashorn.api.tree.test;

import jdk.nashorn.api.tree.CompilationUnitTree;
import jdk.nashorn.api.tree.ExpressionStatementTree;
import jdk.nashorn.api.tree.FunctionCallTree;
import jdk.nashorn.api.tree.Parser;
import jdk.nashorn.api.tree.Tree;
import jdk.nashorn.api.tree.UnaryTree;
import org.testng.Assert;
import org.testng.annotations.Test;

/**
 * @test
 * @bug 8184723
 * @summary Parser should not eagerly transform delete expressions
 * @run testng jdk.nashorn.api.tree.test.JDK_8193296_Test
 */
public class JDK_8193296_Test {
    @Test
    public void test() {
        Parser p = Parser.create();
        CompilationUnitTree t = p.parse("test", "function x() { }; delete x();", System.out::println);
        Assert.assertEquals(t.getSourceElements().size(), 2);
        Tree delt = ((ExpressionStatementTree)t.getSourceElements().get(1)).getExpression();
        Assert.assertTrue(delt instanceof UnaryTree, delt.getClass().getName());
        UnaryTree del = (UnaryTree)delt;
        Assert.assertEquals(del.getKind(), Tree.Kind.DELETE);
        Assert.assertTrue(del.getExpression() instanceof FunctionCallTree, del.getExpression().getClass().getName());
    }
}