/*
* Copyright 2015 the original author or authors.
*
* 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.springframework.statemachine.guard;
import static org.hamcrest.CoreMatchers.is;
import static org.hamcrest.Matchers.contains;
import static org.hamcrest.Matchers.notNullValue;
import static org.junit.Assert.assertThat;
import java.util.concurrent.TimeUnit;
import org.junit.Test;
import org.springframework.context.annotation.AnnotationConfigApplicationContext;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.task.SyncTaskExecutor;
import org.springframework.core.task.TaskExecutor;
import org.springframework.statemachine.AbstractStateMachineTests.TestAction;
import org.springframework.statemachine.AbstractStateMachineTests.TestEvents;
import org.springframework.statemachine.AbstractStateMachineTests.TestGuard;
import org.springframework.statemachine.AbstractStateMachineTests.TestStates;
import org.springframework.statemachine.ObjectStateMachine;
import org.springframework.statemachine.StateContext;
import org.springframework.statemachine.StateMachineSystemConstants;
import org.springframework.statemachine.config.EnableStateMachine;
import org.springframework.statemachine.config.EnumStateMachineConfigurerAdapter;
import org.springframework.statemachine.config.builders.StateMachineStateConfigurer;
import org.springframework.statemachine.config.builders.StateMachineTransitionConfigurer;
/**
* Tests for state machine guards.
*
* @author Janne Valkealahti
*
*/
public class GuardTests {
@SuppressWarnings({ "unchecked" })
@Test
public void testGuardEvaluated() throws Exception {
AnnotationConfigApplicationContext ctx = new AnnotationConfigApplicationContext(Config1.class);
ObjectStateMachine<TestStates,TestEvents> machine =
ctx.getBean(StateMachineSystemConstants.DEFAULT_ID_STATEMACHINE, ObjectStateMachine.class);
TestGuard testGuard = ctx.getBean("testGuard", TestGuard.class);
TestAction testAction = ctx.getBean("testAction", TestAction.class);
assertThat(testGuard, notNullValue());
assertThat(testAction, notNullValue());
machine.start();
machine.sendEvent(TestEvents.E1);
assertThat(testGuard.onEvaluateLatch.await(2, TimeUnit.SECONDS), is(true));
assertThat(testAction.onExecuteLatch.await(2, TimeUnit.SECONDS), is(true));
ctx.close();
}
@SuppressWarnings({ "unchecked" })
@Test
public void testGuardDenyAction() throws Exception {
AnnotationConfigApplicationContext ctx = new AnnotationConfigApplicationContext(Config2.class);
ObjectStateMachine<TestStates,TestEvents> machine =
ctx.getBean(StateMachineSystemConstants.DEFAULT_ID_STATEMACHINE, ObjectStateMachine.class);
TestGuard testGuard = ctx.getBean("testGuard", TestGuard.class);
TestAction testAction = ctx.getBean("testAction", TestAction.class);
assertThat(testGuard, notNullValue());
assertThat(testAction, notNullValue());
machine.start();
assertThat(machine.getState().getIds(), contains(TestStates.S1));
machine.sendEvent(TestEvents.E1);
assertThat(testGuard.onEvaluateLatch.await(2, TimeUnit.SECONDS), is(true));
assertThat(testAction.onExecuteLatch.await(2, TimeUnit.SECONDS), is(false));
assertThat(machine.getState().getIds(), contains(TestStates.S1));
ctx.close();
}
@SuppressWarnings({ "unchecked" })
@Test
public void testGuardThrows() throws Exception {
AnnotationConfigApplicationContext ctx = new AnnotationConfigApplicationContext(Config3.class);
ObjectStateMachine<TestStates,TestEvents> machine =
ctx.getBean(StateMachineSystemConstants.DEFAULT_ID_STATEMACHINE, ObjectStateMachine.class);
machine.start();
assertThat(machine.getState().getIds(), contains(TestStates.S1));
machine.sendEvent(TestEvents.E1);
assertThat(machine.getState().getIds(), contains(TestStates.S1));
machine.sendEvent(TestEvents.E2);
assertThat(machine.getState().getIds(), contains(TestStates.S1));
machine.sendEvent(TestEvents.E3);
assertThat(machine.getState().getIds(), contains(TestStates.S2));
ctx.close();
}
@Configuration
@EnableStateMachine
public static class Config1 extends EnumStateMachineConfigurerAdapter<TestStates, TestEvents> {
@Override
public void configure(StateMachineStateConfigurer<TestStates, TestEvents> states) throws Exception {
states
.withStates()
.initial(TestStates.S1)
.state(TestStates.S1)
.state(TestStates.S2);
}
@Override
public void configure(StateMachineTransitionConfigurer<TestStates, TestEvents> transitions) throws Exception {
transitions
.withExternal()
.source(TestStates.S1)
.target(TestStates.S2)
.event(TestEvents.E1)
.action(testAction())
.guard(testGuard());
}
@Bean
public TestAction testAction() {
return new TestAction();
}
@Bean
public TestGuard testGuard() {
return new TestGuard(true);
}
@Bean
public TaskExecutor taskExecutor() {
return new SyncTaskExecutor();
}
}
@Configuration
@EnableStateMachine
public static class Config2 extends EnumStateMachineConfigurerAdapter<TestStates, TestEvents> {
@Override
public void configure(StateMachineStateConfigurer<TestStates, TestEvents> states) throws Exception {
states
.withStates()
.initial(TestStates.S1)
.state(TestStates.S1)
.state(TestStates.S2);
}
@Override
public void configure(StateMachineTransitionConfigurer<TestStates, TestEvents> transitions) throws Exception {
transitions
.withExternal()
.source(TestStates.S1)
.target(TestStates.S2)
.event(TestEvents.E1)
.action(testAction())
.guard(testGuard());
}
@Bean
public TestGuard testGuard() {
return new TestGuard(false);
}
@Bean
public TestAction testAction() {
return new TestAction();
}
@Bean
public TaskExecutor taskExecutor() {
return new SyncTaskExecutor();
}
}
@Configuration
@EnableStateMachine
public static class Config3 extends EnumStateMachineConfigurerAdapter<TestStates, TestEvents> {
@Override
public void configure(StateMachineStateConfigurer<TestStates, TestEvents> states) throws Exception {
states
.withStates()
.initial(TestStates.S1)
.state(TestStates.S1)
.state(TestStates.S2);
}
@Override
public void configure(StateMachineTransitionConfigurer<TestStates, TestEvents> transitions) throws Exception {
transitions
.withExternal()
.source(TestStates.S1)
.target(TestStates.S2)
.event(TestEvents.E1)
.guard(testGuard1())
.and()
.withExternal()
.source(TestStates.S1)
.target(TestStates.S2)
.event(TestEvents.E2)
.guard(testGuard2())
.and()
.withExternal()
.source(TestStates.S1)
.target(TestStates.S2)
.event(TestEvents.E3);
}
@Bean
public Guard<TestStates, TestEvents> testGuard1() {
return new Guard<TestStates, TestEvents>() {
@Override
public boolean evaluate(StateContext<TestStates, TestEvents> context) {
throw new RuntimeException();
}
};
}
@Bean
public Guard<TestStates, TestEvents> testGuard2() {
return new Guard<TestStates, TestEvents>() {
@Override
public boolean evaluate(StateContext<TestStates, TestEvents> context) {
throw new Error();
}
};
}
}
}