Uebung-TDD-mit-Abhaengigkeiten/src/test/java/de/edu/hsfulda/ccip/tdd/withdependencies/GameOfLifeCellTest.java

package de.edu.hsfulda.ccip.tdd.withdependencies;

import static org.junit.Assert.assertThat;

import java.util.Arrays;
import java.util.Collections;
import java.util.List;

import org.hamcrest.CoreMatchers;
import org.junit.Ignore;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Test;
import org.mockito.ArgumentCaptor;
import org.mockito.Mockito;

class GameOfLifeCellTest {

	private GameOfLifeStatus status = Mockito.mock(GameOfLifeStatus.class, "initial state");

	private GameOfLifeCell gameOfLifeCell;

	private List<GameOfLifeCell> neighbors;
	private GameOfLifeCell neigborCell = Mockito.mock(GameOfLifeCell.class);

	@BeforeEach
	void setUp() throws Exception {
		gameOfLifeCell = new GameOfLifeCell(status);
		neighbors = Arrays.asList(neigborCell, neigborCell, neigborCell, neigborCell, neigborCell, neigborCell,
				neigborCell, neigborCell);

		for (GameOfLifeCell neighbor : neighbors) {
			gameOfLifeCell.addNeighbor(neighbor);
		}
	}

	@Test
	void passesNeighborStatusToOwn() {

		gameOfLifeCell.caclulateNextState();

		ArgumentCaptor<List<GameOfLifeStatus>> listOfNeghborStates = ArgumentCaptor.forClass(List.class);
		Mockito.verify(status).calculateNextBy(listOfNeghborStates.capture());
		assertThat("all neighbor states", listOfNeghborStates.getValue().size(),
				CoreMatchers.equalTo(neighbors.size()));
	}

	@Test
	void doesNotChangeStateWhenCalculating() {
		GameOfLifeStatus newState = Mockito.mock(GameOfLifeStatus.class);
		Mockito.doReturn(newState).when(status).calculateNextBy(Mockito.anyList());

		gameOfLifeCell.caclulateNextState();
		GameOfLifeStatus currentState = gameOfLifeCell.getState();

		Mockito.verify(status).calculateNextBy(Mockito.anyList());

		assertThat("status not changed", currentState, CoreMatchers.equalTo(status));

	}

	@Test
	void changesStateWhenRequested() {
		GameOfLifeStatus newState = Mockito.mock(GameOfLifeStatus.class, "new state");
		Mockito.doReturn(newState).when(status).calculateNextBy(Mockito.anyList());

		gameOfLifeCell.caclulateNextState();
		gameOfLifeCell.updateState();

		GameOfLifeStatus currentState = gameOfLifeCell.getState();

		Mockito.verify(status).calculateNextBy(Mockito.anyList());

		assertThat("status  changed", currentState, CoreMatchers.equalTo(newState));
	}
	
}