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package edu.caltech.cs2.interfaces;
import edu.caltech.cs2.interfaces.ICollection;
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Order;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.CsvSource;
import org.junit.jupiter.params.provider.ValueSource;
import java.util.Collections;
import java.util.List;
import java.util.Random;
import static edu.caltech.cs2.project03.Project03TestOrdering.*;
import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertFalse;
import static org.junit.jupiter.api.Assertions.assertTrue;
public interface ICollectionTests {
ICollection<Object> newCollection();
@Order(collectionTestLevel)
@DisplayName("Simple tests of various ICollection functions")
@ParameterizedTest(name = "Test add(), size(), isEmpty(), contains(), and clear() on [{arguments}]")
@ValueSource(strings = {
"",
"1",
"0, 1, 2, 3",
"5, 4, 3, 2, 1",
"8, 3, 5, 7, 4, 3, 12, 12, 1"
})
default void testCollectionFunctions(String inputs) {
ICollection<Object> impl = newCollection();
List<Object> reference = new java.util.ArrayList<>();
// Check that collection is empty
assertTrue(impl.isEmpty(), "collection should be empty");
// Check that values are not in collection
for (Object value : inputs.trim().split(", ")) {
assertFalse(impl.contains(value), "value should not be contained");
}
// Add all values to collection
for (Object value : inputs.trim().split(", ")) {
impl.add(value);
reference.add(value);
}
// Check that size() and isEmpty() is correct
assertEquals(reference.size(), impl.size(), "sizes should be equal");
assertFalse(impl.isEmpty(), "collection should not be empty");
// Check that values are in collection
for (Object value : inputs.trim().split(", ")) {
assertTrue(impl.contains(value), "value should be contained");
}
// Clear and make sure size() and isEmpty() match
impl.clear();
assertEquals(0, impl.size(), "size should be 0");
assertTrue(impl.isEmpty(), "collection should be empty");
// Check that values are not in collection
for (Object value : inputs.trim().split(", ")) {
assertFalse(impl.contains(value), "value should not be contained");
}
}
@Order(collectionTestLevel)
@Test
@DisplayName("Test repeated emptying and filling of ICollection with single element")
default void testFillEmptyCollection() {
ICollection<Object> impl = newCollection();
for (int i = 0; i < 10; i ++) {
impl.add("a");
assertEquals(1, impl.size(), "collection should have 1 element");
impl.clear();
assertTrue(impl.isEmpty());
}
}
@Order(collectionTestLevel)
@DisplayName("Stress test for add(...)")
@ParameterizedTest(name = "Test add()ing {1} random numbers with seed = {0}")
@CsvSource({
"100, 3000", "42, 1000"
})
default void stressTestAdd(int seed, int size) {
Random r = new Random(seed);
List<Integer> reference = new java.util.ArrayList<>();
ICollection<Object> impl = newCollection();
// Test adding values updates size and displays contained correctly
for (int i = 0; i < size; i++) {
int num = r.nextInt();
reference.add(num);
impl.add(num);
assertEquals(reference.size(), impl.size(), "size()s are not equal");
assertEquals(reference.contains(num), impl.contains(num), "value should be contained");
}
// Test that values not in collection are not contained
for (int i = 0; i < size; i++) {
int num = r.nextInt();
assertEquals(reference.contains(num), impl.contains(num), "contained values do not match");
}
}
@Order(collectionTestLevel)
@DisplayName("Stress test for contains(...)")
@ParameterizedTest(name = "Test contains() with {1} random numbers and seed = {0}")
@CsvSource({
"100, 3000", "42, 1000"
})
default void stressTestContains(int seed, int size) {
Random r = new Random(seed);
List<Integer> nums = new java.util.ArrayList<>();
ICollection<Object> impl = newCollection();
// Add values to both the list of nums and test collection
for (int i = 0; i < size; i++) {
int num = r.nextInt();
nums.add(num);
impl.add(num);
}
// Shuffle order of nums and check that all are contained in the collection
Collections.shuffle(nums);
for (int num : nums) {
assertTrue(impl.contains(num), "value should be contained");
}
// Test that values not in collection are not contained
for (int i = 0; i < size; i++) {
int num = r.nextInt();
assertEquals(nums.contains(num), impl.contains(num), "contained values do not match");
}
}
}