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package org.bouncycastle.asn1.test;

import java.io.IOException;

import junit.framework.TestCase;

import org.bouncycastle.asn1.ASN1Boolean;
import org.bouncycastle.asn1.ASN1Enumerated;
import org.bouncycastle.asn1.ASN1ObjectIdentifier;
import org.bouncycastle.asn1.ASN1Primitive;
import org.bouncycastle.asn1.ASN1Sequence;
import org.bouncycastle.util.encoders.Hex;

/**
 * Tests used to verify correct decoding of the ENUMERATED type.
 */
public class EnumeratedTest
    extends TestCase
{
    /**
     * Test vector used to test decoding of multiple items. This sample uses an ENUMERATED and a BOOLEAN.
     */
    private static final byte[] MultipleSingleByteItems = Hex.decode("30060a01010101ff");

    /**
     * Test vector used to test decoding of multiple items. This sample uses two ENUMERATEDs.
     */
    private static final byte[] MultipleDoubleByteItems = Hex.decode("30080a0201010a020202");

    /**
     * Test vector used to test decoding of multiple items. This sample uses an ENUMERATED and an OBJECT IDENTIFIER.
     */
    private static final byte[] MultipleTripleByteItems = Hex.decode("300a0a0301010106032b0601");

    /**
     * Makes sure multiple identically sized values are parsed correctly.
     */
    public void testReadingMultipleSingleByteItems()
        throws IOException
    {
        ASN1Primitive obj = ASN1Primitive.fromByteArray(MultipleSingleByteItems);

        assertTrue("Null ASN.1 SEQUENCE", obj instanceof ASN1Sequence);

        ASN1Sequence sequence = (ASN1Sequence)obj;

        assertEquals("2 items expected", 2, sequence.size());

        ASN1Enumerated enumerated = ASN1Enumerated.getInstance(sequence.getObjectAt(0));

        assertNotNull("ENUMERATED expected", enumerated);

        assertEquals("Unexpected ENUMERATED value", 1, enumerated.intValueExact());

        ASN1Boolean b = ASN1Boolean.getInstance(sequence.getObjectAt(1));

        assertNotNull("BOOLEAN expected", b);

        assertTrue("Unexpected BOOLEAN value", b.isTrue());
    }

    /**
     * Makes sure multiple identically sized values are parsed correctly.
     */
    public void testReadingMultipleDoubleByteItems()
        throws IOException
    {
        ASN1Primitive obj = ASN1Primitive.fromByteArray(MultipleDoubleByteItems);

        assertTrue("Null ASN.1 SEQUENCE", obj instanceof ASN1Sequence);

        ASN1Sequence sequence = (ASN1Sequence)obj;

        assertEquals("2 items expected", 2, sequence.size());

        ASN1Enumerated enumerated1 = ASN1Enumerated.getInstance(sequence.getObjectAt(0));

        assertNotNull("ENUMERATED expected", enumerated1);

        assertEquals("Unexpected ENUMERATED value", 257, enumerated1.intValueExact());

        ASN1Enumerated enumerated2 = ASN1Enumerated.getInstance(sequence.getObjectAt(1));

        assertNotNull("ENUMERATED expected", enumerated2);

        assertEquals("Unexpected ENUMERATED value", 514, enumerated2.intValueExact());
    }

    /**
     * Makes sure multiple identically sized values are parsed correctly.
     */
    public void testReadingMultipleTripleByteItems()
        throws IOException
    {
        ASN1Primitive obj = ASN1Primitive.fromByteArray(MultipleTripleByteItems);

        assertTrue("Null ASN.1 SEQUENCE", obj instanceof ASN1Sequence);

        ASN1Sequence sequence = (ASN1Sequence)obj;

        assertEquals("2 items expected", 2, sequence.size());

        ASN1Enumerated enumerated = ASN1Enumerated.getInstance(sequence.getObjectAt(0));

        assertNotNull("ENUMERATED expected", enumerated);

        assertEquals("Unexpected ENUMERATED value", 65793, enumerated.intValueExact());

        ASN1ObjectIdentifier objectId = ASN1ObjectIdentifier.getInstance(sequence.getObjectAt(1));

        assertNotNull("OBJECT IDENTIFIER expected", objectId);

        assertEquals("Unexpected OBJECT IDENTIFIER value", "1.3.6.1", objectId.getId());
    }
}