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package com.oracle.truffle.api.strings.test.ops;

import static org.junit.runners.Parameterized.Parameter;

import java.util.Arrays;

import org.junit.Assert;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.Parameterized;
import org.junit.runners.Parameterized.Parameters;

import com.oracle.truffle.api.strings.TruffleString;
import com.oracle.truffle.api.strings.test.TStringTestBase;

@RunWith(Parameterized.class)
public class TStringLastIndexOfCodePointTest extends TStringTestBase {

    @Parameter public TruffleString.LastIndexOfCodePointNode node;

    @Parameters(name = "{0}")
    public static Iterable<TruffleString.LastIndexOfCodePointNode> data() {
        return Arrays.asList(TruffleString.LastIndexOfCodePointNode.create(), TruffleString.LastIndexOfCodePointNode.getUncached());
    }

    @Test
    public void testAll() throws Exception {
        forAllStrings(true, (a, array, codeRange, isValid, encoding, codepoints, byteIndices) -> {
            Assert.assertEquals(lastIndexOfCodePoint(codepoints, codepoints[0]), node.execute(a, codepoints[0], codepoints.length, 0, encoding));
            Assert.assertEquals(codepoints.length - 1, node.execute(a, codepoints[codepoints.length - 1], codepoints.length, 0, encoding));
        });
    }

    private static int lastIndexOfCodePoint(int[] array, int cp) {
        for (int i = array.length - 1; i >= 0; i--) {
            if (array[i] == cp) {
                return i;
            }
        }
        return -1;
    }

    @Test
    public void testNull() throws Exception {
        checkNullSE((s, e) -> node.execute(s, 0, 1, 0, e));
    }

    @Test
    public void testOutOfBounds() throws Exception {
        checkOutOfBoundsFromTo(false, (a, toIndex, fromIndex, encoding) -> node.execute(a, 0, fromIndex, toIndex, encoding));
    }
}
