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import java.net.URLPermission;

import org.testng.Assert;
import org.testng.annotations.Test;

/**
 * @test
 * @bug 8297311
 * @summary Verify that the exception thrown by URLPermission class, for invalid host name,
 * contains expected exception message
 * @run testng InvalidCharacterTest
 */
public class InvalidCharacterTest {

    /**
     * Creates an instance of URLPermission with a string containing invalid character
     * and verifies that the construction fails with IllegalArgumentException
     */
    @Test
    public void testIllegalArgException() throws Exception {
        final char invalidChar = '%';
        // we expect this string in the exception message
        final String expectedStringInMessage = String.format("\\u%04x", (int) invalidChar);
        final String url = "http://foo" + invalidChar + "bar.com:12345";
        final IllegalArgumentException iae = Assert.expectThrows(IllegalArgumentException.class,
                () -> new URLPermission(url));
        // additionally check the error message contains the invalid char
        final String exMessage = iae.getMessage();
        System.out.println("Got exception message: " + exMessage);
        Assert.assertNotNull(exMessage, "Exception message is null");
        Assert.assertTrue(exMessage.contains(expectedStringInMessage),
                expectedStringInMessage + " missing from exception message: " + exMessage);
    }
}