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/*
* SonarQube
* Copyright (C) 2009-2021 SonarSource SA
* mailto:info AT sonarsource DOT com
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 3 of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
package org.sonar.process;
import org.junit.Test;
import static org.assertj.core.api.Assertions.assertThat;
import static org.sonar.process.Lifecycle.State;
import static org.sonar.process.Lifecycle.State.HARD_STOPPING;
import static org.sonar.process.Lifecycle.State.INIT;
import static org.sonar.process.Lifecycle.State.OPERATIONAL;
import static org.sonar.process.Lifecycle.State.RESTARTING;
import static org.sonar.process.Lifecycle.State.STARTED;
import static org.sonar.process.Lifecycle.State.STARTING;
import static org.sonar.process.Lifecycle.State.STOPPED;
import static org.sonar.process.Lifecycle.State.STOPPING;
import static org.sonar.process.Lifecycle.State.values;
public class LifecycleTest {
@Test
public void equals_and_hashcode() {
Lifecycle init = new Lifecycle();
assertThat(init.equals(init)).isTrue();
assertThat(init.equals(new Lifecycle())).isTrue();
assertThat(init.equals("INIT")).isFalse();
assertThat(init.equals(null)).isFalse();
assertThat(init).hasSameHashCodeAs(new Lifecycle());
// different state
Lifecycle stopping = new Lifecycle();
stopping.tryToMoveTo(STARTING);
assertThat(stopping).isNotEqualTo(init);
}
@Test
public void try_to_move_does_not_support_jumping_states() {
Lifecycle lifecycle = new Lifecycle();
assertThat(lifecycle.isCurrentState(INIT)).isTrue();
assertThat(lifecycle.tryToMoveTo(STARTED)).isFalse();
assertThat(lifecycle.isCurrentState(INIT)).isTrue();
assertThat(lifecycle.tryToMoveTo(STARTING)).isTrue();
assertThat(lifecycle.isCurrentState(STARTING)).isTrue();
}
@Test
public void no_state_can_not_move_to_itself() {
for (State state : values()) {
assertThat(newLifeCycle(state).tryToMoveTo(state)).isFalse();
}
}
@Test
public void can_move_to_STOPPING_from_STARTING_STARTED_OPERATIONAL_only() {
for (State state : values()) {
boolean tryToMoveTo = newLifeCycle(state).tryToMoveTo(STOPPING);
if (state == STARTING || state == STARTED || state == OPERATIONAL) {
assertThat(tryToMoveTo).describedAs("from state " + state).isTrue();
} else {
assertThat(tryToMoveTo).describedAs("from state " + state).isFalse();
}
}
}
@Test
public void can_move_to_OPERATIONAL_from_STARTED_only() {
for (State state : values()) {
boolean tryToMoveTo = newLifeCycle(state).tryToMoveTo(OPERATIONAL);
if (state == STARTED) {
assertThat(tryToMoveTo).describedAs("from state " + state).isTrue();
} else {
assertThat(tryToMoveTo).describedAs("from state " + state).isFalse();
}
}
}
@Test
public void can_move_to_STARTING_from_RESTARTING() {
assertThat(newLifeCycle(RESTARTING).tryToMoveTo(STARTING)).isTrue();
}
@Test
public void can_move_to_STOPPING_only_from_STARTING_STARTED_and_OPERATIONAL() {
for (State state : values()) {
boolean tryToMoveTo = newLifeCycle(state).tryToMoveTo(STOPPING);
if (state == STARTING || state == STARTED || state == OPERATIONAL) {
assertThat(tryToMoveTo).describedAs("from state " + state).isTrue();
} else {
assertThat(tryToMoveTo).describedAs("from state " + state).isFalse();
}
}
}
@Test
public void can_move_to_HARD_STOPPING_from_any_step_but_from_INIT_HARD_STOPPING_and_STOPPED() {
for (State state : values()) {
boolean tryToMoveTo = newLifeCycle(state).tryToMoveTo(HARD_STOPPING);
if (state == INIT || state == STOPPED || state == HARD_STOPPING) {
assertThat(tryToMoveTo).describedAs("from state " + state).isFalse();
} else {
assertThat(tryToMoveTo).describedAs("from state " + state).isTrue();
}
}
}
/**
* Creates a Lifecycle object in the specified state emulating that the shortest path to this state has been followed
* to reach it.
*/
private static Lifecycle newLifeCycle(State state) {
switch (state) {
case INIT:
return new Lifecycle();
case STARTING:
return newLifeCycle(INIT, state);
case STARTED:
return newLifeCycle(STARTING, state);
case OPERATIONAL:
return newLifeCycle(STARTED, state);
case RESTARTING:
return newLifeCycle(OPERATIONAL, state);
case STOPPING:
return newLifeCycle(OPERATIONAL, state);
case HARD_STOPPING:
return newLifeCycle(STARTING, state);
case STOPPED:
return newLifeCycle(STOPPING, state);
default:
throw new IllegalArgumentException("Unsupported state " + state);
}
}
private static Lifecycle newLifeCycle(State from, State to) {
Lifecycle lifecycle;
lifecycle = newLifeCycle(from);
assertThat(lifecycle.tryToMoveTo(to)).isTrue();
return lifecycle;
}
}
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