MathsTest.java

package org.nutz.lang;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertTrue;
import static org.nutz.lang.Maths.bit;
import static org.nutz.lang.Maths.isMask;
import static org.nutz.lang.Maths.isMaskAll;
import static org.nutz.lang.Maths.isNoMask;

import org.junit.Test;

public class MathsTest {

    private int[] nums = new int[]{12, 5, 26, 33, -4, 11, 8};

    @Test
    public void testIsMask() {
        assertTrue(isMask(bit("100"), bit("110")));
        assertFalse(isMask(bit("100"), bit("10010")));
    }

    @Test
    public void testIsMaskAll() {
        assertFalse(isMaskAll(bit("100"), bit("110")));
        assertTrue(isMaskAll(bit("100101111"), bit("001110")));
    }

    @Test
    public void test_extract_int() {
        assertEquals(3, Maths.extract(7, 1, 3));
        assertEquals(1, Maths.extract(7, 0, 1));
        assertEquals(3, Maths.extract(255, 4, 6));
    }

    @Test
    public void test_is_not_mask_all() {
        assertFalse(isNoMask(bit("0110"), bit("1100")));
        assertFalse(isNoMask(bit("0100"), bit("1100")));
        assertFalse(isNoMask(bit("1000"), bit("1100")));
        assertTrue(isNoMask(bit("110011"), bit("1100")));
        assertFalse(isNoMask(bit("111011"), bit("1100")));
    }

    @Test
    public void test_max() throws Exception {
        assertEquals(Maths.max(nums), 33);
    }

    @Test
    public void test_min() throws Exception {
        assertEquals(Maths.min(nums), -4);
    }

}