src/test/java/org/mockitousage/examples/use/ExampleTest.java

/*
 * Copyright (c) 2007 Mockito contributors
 * This program is made available under the terms of the MIT License.
 */

package org.mockitousage.examples.use;

import org.junit.Rule;
import org.junit.Test;
import org.mockito.InOrder;
import org.mockito.InjectMocks;
import org.mockito.Mock;
import org.mockito.junit.MockitoJUnit;
import org.mockito.junit.MockitoRule;

import java.util.Arrays;

import static org.mockito.Mockito.*;

public class ExampleTest {

    @Rule public MockitoRule rule = MockitoJUnit.rule();

    @Mock private ArticleCalculator mockCalculator;
    @Mock private ArticleDatabase mockDatabase;

    @InjectMocks private ArticleManager articleManager;

    @Test
    public void managerCountsArticlesAndSavesThemInTheDatabase() {
        when(mockCalculator.countArticles("Guardian")).thenReturn(12);
        when(mockCalculator.countArticlesInPolish(anyString())).thenReturn(5);

        articleManager.updateArticleCounters("Guardian");

        verify(mockDatabase).updateNumberOfArticles("Guardian", 12);
        verify(mockDatabase).updateNumberOfPolishArticles("Guardian", 5);
        verify(mockDatabase).updateNumberOfEnglishArticles("Guardian", 7);
    }

    @Test
    public void managerCountsArticlesUsingCalculator() {
        articleManager.updateArticleCounters("Guardian");

        verify(mockCalculator).countArticles("Guardian");
        verify(mockCalculator).countArticlesInPolish("Guardian");
    }

    @Test
    public void managerSavesArticlesInTheDatabase() {
        articleManager.updateArticleCounters("Guardian");

        verify(mockDatabase).updateNumberOfArticles("Guardian", 0);
        verify(mockDatabase).updateNumberOfPolishArticles("Guardian", 0);
        verify(mockDatabase).updateNumberOfEnglishArticles("Guardian", 0);
    }

    @Test
    public void managerUpdatesNumberOfRelatedArticles() {
        Article articleOne = new Article();
        Article articleTwo = new Article();
        Article articleThree = new Article();

        when(mockCalculator.countNumberOfRelatedArticles(articleOne)).thenReturn(1);
        when(mockCalculator.countNumberOfRelatedArticles(articleTwo)).thenReturn(12);
        when(mockCalculator.countNumberOfRelatedArticles(articleThree)).thenReturn(0);

        when(mockDatabase.getArticlesFor("Guardian")).thenReturn(Arrays.asList(articleOne, articleTwo, articleThree));

        articleManager.updateRelatedArticlesCounters("Guardian");

        verify(mockDatabase).save(articleOne);
        verify(mockDatabase).save(articleTwo);
        verify(mockDatabase).save(articleThree);
    }

    @Test
    public void shouldPersistRecalculatedArticle() {
        Article articleOne = new Article();
        Article articleTwo = new Article();

        when(mockCalculator.countNumberOfRelatedArticles(articleOne)).thenReturn(1);
        when(mockCalculator.countNumberOfRelatedArticles(articleTwo)).thenReturn(12);

        when(mockDatabase.getArticlesFor("Guardian")).thenReturn(Arrays.asList(articleOne, articleTwo));

        articleManager.updateRelatedArticlesCounters("Guardian");

        InOrder inOrder = inOrder(mockDatabase, mockCalculator);

        inOrder.verify(mockCalculator).countNumberOfRelatedArticles((Article) anyObject());
        inOrder.verify(mockDatabase, atLeastOnce()).save((Article) anyObject());
    }
}