package com.github.congcongcong250.coding2017.basicTest;
import static org.junit.Assert.assertArrayEquals;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNull;
import org.junit.Before;
import org.junit.Rule;
import org.junit.Test;
import org.junit.rules.ExpectedException;
import com.github.congcongcong250.coding2017.basic.ArrayUtil;
public class ArrayUtilTest {
private ArrayUtil myArray;
@Before
public void setUp() throws Exception {
myArray = new ArrayUtil();
}
@Test
public void testReverseArray() {
int[] origin = { 1, 2, 1, 3, 5, 6 };
int[] reverse = { 6, 5, 3, 1, 2, 1 };
myArray.reverseArray(origin);
assertArrayEquals(origin, reverse);
int[] empty = new int[0];
myArray.reverseArray(empty);
assertArrayEquals(empty, new int[0]);
}
@Test
public void testRemoveZero() {
int[] oldArray = { 1, 5, 0, 0, 6, 6, 0, 5, 4, 0, 7, 6, 7, 1, 2, 0 };
int[] newArray = { 1, 5, 6, 6, 5, 4, 7, 6, 7, 1, 2 };
int[] res = myArray.removeZero(oldArray);
assertArrayEquals(newArray, res);
int[] nl = null;
int[] nll = myArray.removeZero(nl);
assertNull(nll);
}
@Test
public void testMerge() {
int a1[] = { 1, 2, 3, 4, 5 };
int b1[] = { 3, 4, 5, 6, 7, 8 };
int c1[] = { 1, 2, 3, 4, 5, 6, 7, 8 };
int[] newArray1 = myArray.merge(a1, b1);
assertArrayEquals(c1, newArray1);
int a2[] = new int[0];
int b2[] = { 0, 2, 3, 6, 7, 8 };
int c2[] = { 0, 2, 3, 6, 7, 8 };
int[] newArray2 = myArray.merge(a2, b2);
assertArrayEquals(c2, newArray2);
int a3[] = { 0, 2, 3, 6, 7, 8 };
int b3[] = new int[0];
int c3[] = { 0, 2, 3, 6, 7, 8 };
int[] newArray3 = myArray.merge(a3, b3);
assertArrayEquals(c3, newArray3);
int[] a4 = null;
int[] b4 = null;
int[] newArray4 = myArray.merge(a4, b4);
assertNull(newArray4);
}
@Rule
public ExpectedException expectedEx = ExpectedException.none();
@Test
public void testGrow() {
int[] a = { 3, 5, 7, 8, 9 };
int[] b = { 3, 5, 7, 8, 9, 0, 0, 0 };
int[] newArray = myArray.grow(a, 3);
assertArrayEquals(b, newArray);
int[] c = null;
int[] newArray1 = myArray.grow(c, 3);
assertNull(newArray1);
// size < 0
expectedEx.expect(Exception.class);
myArray.grow(a, -3);
}
@Test
public void testFibonacci() {
int[] array1 = myArray.fibonacci(1);
int[] b = new int[0];
assertArrayEquals(array1, b);
int[] array2 = myArray.fibonacci(35);
int[] c = { 1, 1, 2, 3, 5, 8, 13, 21, 34 };
assertArrayEquals(c, array2);
}
@Test
public void testGetPrimes() {
int[] a = { 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31 };
int[] array1 = myArray.getPrimes(35);
assertArrayEquals(a, array1);
int[] array2 = myArray.getPrimes(1);
int[] b = new int[0];
assertArrayEquals(array2, b);
}
@Test
public void testGetPerfectNumbers() {
int[] array = myArray.getPerfectNumbers(10000);
int[] a = { 6, 28, 496, 8128 };
assertArrayEquals(a, array);
}
@Test
public void testJoin() {
int[] a = { 3, 5, 7, 8, 9 };
String s0 = myArray.join(a, "-");
String s1 = "3-5-7-8-9";
assertEquals(s1, s0);
int[] a1 = { 3 };
String s2 = myArray.join(a1, "-");
String s3 = "3";
assertEquals(s2, s3);
int[] a0 = new int[0];
String s4 = myArray.join(a0, "-");
String s5 = "";
assertEquals(s4, s5);
}
}