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import static org.junit.jupiter.api.Assertions.*;
import org.junit.jupiter.api.Test;
class FractionalKnapsackTest {
@Test
void testGetSortedIndexArray() {
int[] values = new int[] { 60, 100, 120 };
int[] weights = new int[] { 20, 50, 30 };
int[] sortedIndexArray = new int[] { 1, 0, 2 };
assertArrayEquals(sortedIndexArray, FractionalKnapsack.getSortedIndexArray(values, weights));
}
@Test
void testGetBestItem1() {
int[] values = new int[] { 60, 100, 120 };
int[] weights = new int[] { 20, 50, 30 };
assertEquals(2, FractionalKnapsack.getBestItem(values, weights));
}
@Test
void testGetBestItem2() {
int[] values = new int[] { 500 };
int[] weights = new int[] { 30 };
assertEquals(0, FractionalKnapsack.getBestItem(values, weights));
}
@Test
void testNaive1() {
int[] values = new int[] { 60, 100, 120 };
int[] weights = new int[] { 20, 50, 30 };
int capacity = 50;
assertEquals(180.0000, FractionalKnapsack.getOptimalValueNaive(capacity, values, weights));
}
@Test
void testNaive2() {
int[] values = new int[] { 500 };
int[] weights = new int[] { 30 };
int capacity = 10;
assertEquals(166.6667, FractionalKnapsack.getOptimalValueNaive(capacity, values, weights), 0.0001);
}
@Test
void test1() {
int[] values = new int[] { 60, 100, 120 };
int[] weights = new int[] { 20, 50, 30 };
int capacity = 50;
assertEquals(180.0000, FractionalKnapsack.getOptimalValue(capacity, values, weights));
}
@Test
void test2() {
int[] values = new int[] { 500 };
int[] weights = new int[] { 30 };
int capacity = 10;
assertEquals(166.6667, FractionalKnapsack.getOptimalValue(capacity, values, weights), 0.0001);
}
@Test
void testStress1() {
int[] values = new int[] { 11, 43, 4, 35, 21 };
int[] weights = new int[] { 45, 11, 40, 19, 10 };
int capacity = 50;
assertEquals(101.4444, FractionalKnapsack.getOptimalValue(capacity, values, weights), 0.0001);
}
@Test
void testStress2() {
int[] values = new int[] { 11, 43, 4, 35, 21 };
int[] weights = new int[] { 45, 11, 40, 19, 10 };
int capacity = 50;
assertEquals(101.4444, FractionalKnapsack.getOptimalValueNaive(capacity, values, weights), 0.0001);
}
@Test
void testStress3() {
int[] values = new int[] { 44, 26, 31 };
int[] weights = new int[] { 6, 28, 38 };
int capacity = 50;
assertEquals(83.0526, FractionalKnapsack.getOptimalValue(capacity, values, weights), 0.0001);
}
}
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