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package com.oracle.truffle.llvm.types.floating.test;

import static org.junit.Assert.assertEquals;

import java.util.concurrent.ThreadLocalRandom;

import org.junit.Test;

import com.oracle.truffle.llvm.runtime.floating.LLVM80BitFloat;

public class LLVM80BitGetShortTest extends LLVM80BitTest {

    private static final int NR_RANDOM_NUMBERS = 10000;

    @Test
    public void testPositiveInfinty() {
        int positiveInfity = positiveInfinity().getShortValue();
        assertEquals(0, positiveInfity);
    }

    @Test
    public void testNegativeInfinty() {
        int negativeInfinity = negativeInfinity().getShortValue();
        assertEquals(0, negativeInfinity);
    }

    @Test
    public void testQNAN() {
        int nan = nan().getShortValue();
        assertEquals(0, nan);
    }

    @Test
    public void testZero() {
        int zero = LLVM80BitFloat.fromShort((byte) 0).getShortValue();
        assertEquals(0, zero);
    }

    @Test
    public void testOne() {
        int one = LLVM80BitFloat.fromShort((byte) 1).getShortValue();
        assertEquals(1, one);
    }

    @Test
    public void testMinusOne() {
        int oneInt = LLVM80BitFloat.fromShort((byte) -1).getShortValue();
        assertEquals(-1, oneInt);
    }

    @Test
    public void testRandomInt() {
        for (int i = 0; i < NR_RANDOM_NUMBERS; i++) {
            byte[] bytes = new byte[1];
            ThreadLocalRandom.current().nextBytes(bytes);
            byte nextByte = bytes[0];
            assertEquals(nextByte, LLVM80BitFloat.fromShort(nextByte).getShortValue());
            assertEquals(nextByte, LLVM80BitFloat.fromShort(nextByte).getShortValue());
        }
    }

}