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/*
 * @test
 * @summary Validate some exceptions in MessageFormat
 * @bug 6481179 8039165
 * @run junit MessageFormatExceptions
 */

import java.text.MessageFormat;
import java.util.Locale;

import org.junit.jupiter.api.Test;

import static org.junit.jupiter.api.Assertions.assertDoesNotThrow;
import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertThrows;

public class MessageFormatExceptions {

    // MessageFormat should throw NPE when constructed with a null pattern
    @Test
    public void nullPatternTest() {
        assertThrows(NullPointerException.class, () -> new MessageFormat(null));
        assertThrows(NullPointerException.class, () -> new MessageFormat(null, Locale.US));
        assertThrows(NullPointerException.class,
                () -> MessageFormat.format(null, new Object[] { "val0", "val1" }));
    }

    // 8039165: When MessageFormat is constructed with a null locale a NPE
    // can potentially be thrown depending on the subformat created. Either
    // during the creation of the object itself, or later when format() is called.
    // The following are some examples.
    @Test
    public void nullLocaleTest() {
        // Fails when constructor invokes applyPattern()
        assertThrows(NullPointerException.class,
                () -> new MessageFormat("{0, date}", null));
        // Fail when constructor invokes applyPattern()
        assertThrows(NullPointerException.class,
                () -> new MessageFormat("{0, number}", null));
        // Fail when object calls format()
        assertThrows(NullPointerException.class,
                () -> new MessageFormat("{0}", null).format(new Object[]{42}));
        // Fail when object calls format(), but locale is set via .setLocale()
        MessageFormat msgFmt = new MessageFormat("{0}");
        msgFmt.setLocale(null);
        assertThrows(NullPointerException.class, () -> msgFmt.format(new Object[]{42}));
        // Does not always fail if locale is null
        assertDoesNotThrow(() ->
                new MessageFormat("{0}", null).format(new Object[]{"hello"}));

    }

    // 6481179: Invalid format type should be provided in error message of IAE
    @Test
    public void formatMsgTest() {
        IllegalArgumentException iae = assertThrows(IllegalArgumentException.class,
                () -> MessageFormat.format("Testdata {1,invalid_format_type}", new Object[] { "val0", "val1" }));
        assertEquals("unknown format type: invalid_format_type", iae.getMessage());
    }
}
