Content of file GameMemoryCapacityTest.java

package de.fhdw.gaming.ipspiel23.memory;

import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertFalse;
import static org.junit.jupiter.api.Assertions.assertThrows;
import static org.junit.jupiter.api.Assertions.assertTrue;

import org.junit.jupiter.api.Test;

/**
 * Tests for the {@link GameMemoryCapacity} class.
 */
public class GameMemoryCapacityTest {

    /**
     * Tests the {@link GameMemoryCapacity#unlimited()} method.
     */
    @Test
    void testUnlimited() {
        final IGameMemoryCapacity capacity = GameMemoryCapacity.unlimited();

        assertTrue(capacity.isUnlimited());
        assertFalse(capacity.isDefault());
        assertEquals(-1, capacity.getCapacity());
    }

    /**
     * Tests the {@link GameMemoryCapacity#of(int)} method.
     */
    @Test
    void testOf() {
        final int customCapacity = 10;
        final IGameMemoryCapacity capacity = GameMemoryCapacity.of(customCapacity);

        assertFalse(capacity.isUnlimited());
        assertFalse(capacity.isDefault());
        assertEquals(customCapacity, capacity.getCapacity());
    }

    /**
     * Tests the {@link GameMemoryCapacity#useDefault()} method.
     */
    @Test
    void testUseDefault() {
        final IGameMemoryCapacity capacity = GameMemoryCapacity.useDefault();

        assertFalse(capacity.isUnlimited());
        assertTrue(capacity.isDefault());
        assertEquals(5, capacity.getCapacity());
    }

    /**
     * Tests that an {@link IllegalArgumentException} is thrown when passing an invalid capacity to the
     * {@link GameMemoryCapacity#of(int)} method.
     */
    @Test
    void testInvalidCapacity() {
        final Integer invalidCapacity = -1;

        IllegalArgumentException exception = assertThrows(IllegalArgumentException.class, () -> {
Variable 'exception' should be declared final.
Since Checkstyle 3.2

          Checks that local variables that never have their values changed are
          declared final. The check can be configured to also check that
          unchanged parameters are declared final.
        
            GameMemoryCapacity.of(invalidCapacity);
        });

        assertEquals("Capacity must be greater than or equal to 0", exception.getMessage());
    }
}