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import org.junit.jupiter.api.Test;

import java.net.MalformedURLException;
import java.net.URI;
import java.net.URISyntaxException;
import java.net.URL;
import java.nio.file.Path;

import static org.junit.Assert.assertThrows;

/**
 * @test
 * @bug 8353440
 * @summary Verify that non-local file URLs are rejected by default
 * @run junit/othervm NonLocalFtpFallbackDisabled
 * @run junit/othervm -Djdk.net.file.ftpfallback=false NonLocalFtpFallbackDisabled
 * @run junit/othervm -Djdk.net.file.ftpfallback NonLocalFtpFallbackDisabled
 */
public class NonLocalFtpFallbackDisabled {

    // The file requested in this test
    private Path file = Path.of("ftp-file.txt");

    /**
     * Verifies that the long-standing and unspecified FTP fallback feature
     * where the file URL scheme handler attempts an FTP connection for non-local
     * files is disabled by default and that opening connections for such URLs
     * is rejected with a MalformedURLException.
     *
     * @throws MalformedURLException if an unexpected URL exception occurs
     * @throws URISyntaxException if an unexpected URI exception occurs
     */
    @Test
    public void verifyNonLocalFileURLRejected() throws MalformedURLException, URISyntaxException {
        // We can use a fake host name here, no actual FTP request will be made
        String hostname = "remotehost";

        URL local = file.toUri().toURL();

        URL nonLocal = new URI("file", hostname, local.getFile(), "").toURL();
        assertThrows(MalformedURLException.class, () -> {
            nonLocal.openConnection();
        });

        URL nonLocalEmptyPath = new URI("file", hostname, "", "").toURL();
        assertThrows(MalformedURLException.class, () -> {
            nonLocalEmptyPath.openConnection();
        });
    }
}