StackRegistryTest.java

/*
 * Copyright 2016 Red Hat, Inc. and/or its affiliates.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.kie.workbench.common.stunner.core.registry.impl;

import java.util.Stack;

import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.mockito.Mock;
import org.mockito.runners.MockitoJUnitRunner;

import static org.junit.Assert.*;
import static org.mockito.Mockito.*;

@RunWith(MockitoJUnitRunner.class)
public class StackRegistryTest {

    @Mock
    private Stack<Object> stack;

    private StackRegistry<Object> tested;

    private final KeyProvider<Object> keyProvider = Object::toString;

    @Before
    public void setup() throws Exception {
        tested = new StackRegistry<>(keyProvider,
                                     stack);
    }

    @Test
    public void testRegister() {
        final String s = "an string";
        tested.register(s);
        verify(stack,
               times(1)).add(s);
    }

    @Test
    public void testGetStack() {
        assertEquals(stack,
                     tested.getStack());
    }

    @Test
    public void testPeek() {
        tested.peek();
        verify(stack,
               times(1)).peek();
    }

    @Test
    public void testPop() {
        tested.pop();
        verify(stack,
               times(1)).pop();
    }

    @Test
    public void testRemove() {
        final String s = "an string";
        tested.remove(s);
        verify(stack,
               times(1)).remove(s);
    }

    @Test
    public void testContains() {
        final String s = "an string";
        tested.contains(s);
        verify(stack,
               times(1)).contains(s);
    }

    @Test
    public void testIndexOf() {
        final String s = "an string";
        tested.indexOf(s);
        verify(stack,
               times(1)).indexOf(s);
    }

    @Test
    public void testGetItemByKey() {
        final String s1 = "an string 1";
        final String s2 = "an string 2";
        tested = new StackRegistry<>(keyProvider,
                                     new Stack<Object>() {{
                                         push(s1);
                                         push(s2);
                                     }});
        Object o1 = tested.getItemByKey(s1);
        Object o2 = tested.getItemByKey(s2);
        assertEquals(s1,
                     o1);
        assertEquals(s2,
                     o2);
        assertEquals(null,
                     tested.getItemByKey(null));
        assertEquals(null,
                     tested.getItemByKey("unregistered string"));
    }

    @Test
    public void testEmpty() {
        when(stack.isEmpty()).thenReturn(true);
        boolean empty = tested.isEmpty();
        assertTrue(empty);
    }

    @Test
    public void testNotEmpty() {
        when(stack.isEmpty()).thenReturn(false);
        boolean empty = tested.isEmpty();
        assertFalse(empty);
    }
}