test/nashorn/src/jdk/nashorn/api/scripting/test/JDK_8068741_Test.java

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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * particular file as subject to the "Classpath" exception as provided
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 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
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package jdk.nashorn.api.scripting.test;

import javax.script.ScriptEngineFactory;
import jdk.nashorn.api.scripting.NashornScriptEngineFactory;
import org.testng.Assert;
import org.testng.annotations.Test;

/**
 * @test
 * @run testng jdk.nashorn.api.scripting.test.JDK_8068741_Test
 * @bug 8068741
 * @summary javax.script.ScriptEngineFactory.getMethodCallSyntax() spec allows null passed as an object
 */
public class JDK_8068741_Test {
    @Test
    public void testGetMethodCallSyntax() {
        ScriptEngineFactory fac = new NashornScriptEngineFactory();
        checkThrowsNPE(() -> fac.getMethodCallSyntax(null, "foo"));
        checkThrowsNPE(() -> fac.getMethodCallSyntax("obj", null));
        checkThrowsNPE(() -> fac.getMethodCallSyntax("obj", "foo", (String[])null));
        checkThrowsNPE(() -> fac.getMethodCallSyntax("obj", "foo", null, "xyz"));
        checkThrowsNPE(() -> fac.getMethodCallSyntax("obj", "foo", "xyz", null));
    }

    private void checkThrowsNPE(Runnable r) {
        boolean gotNPE = false;
        try {
            r.run();
        } catch (NullPointerException npe) {
            gotNPE = true;
            System.err.println("Got NPE as expected: " + npe);
        }
        Assert.assertTrue(gotNPE);
    }
}