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/*
* Copyright (C) 2019 The Android Open Source Project
*
* 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 com.android.internal.net.utils;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.fail;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.verify;
import static org.mockito.Mockito.when;
import com.android.internal.net.utils.SimpleStateMachine.SimpleState;
import org.junit.Before;
import org.junit.Test;
public class SimpleStateMachineTest {
private static final String INPUT = "input";
private static final String OUTPUT = "output";
private SimpleStateMachine<String, String> mSimpleStateMachine;
private SimpleState mMockStartState;
private SimpleState mMockFinalState;
@Before
public void setUp() {
mMockStartState = mock(SimpleState.class);
mMockFinalState = mock(SimpleState.class);
mSimpleStateMachine = new SimpleStateMachine(){};
mSimpleStateMachine.transitionTo(mMockStartState);
}
@Test
public void testProcess() {
when(mMockStartState.process(INPUT)).thenReturn(OUTPUT);
String result = mSimpleStateMachine.process(INPUT);
assertEquals(OUTPUT, result);
verify(mMockStartState).process(INPUT);
}
@Test
public void testTransitionTo() {
mSimpleStateMachine.transitionTo(mMockFinalState);
assertEquals(mMockFinalState, mSimpleStateMachine.mState);
}
@Test
public void testTransitionToNull() {
try {
mSimpleStateMachine.transitionTo(null);
fail("IllegalArgumentException expected");
} catch (IllegalArgumentException expected) {
}
}
@Test
public void testTransitionAndProcess() {
when(mMockFinalState.process(INPUT)).thenReturn(OUTPUT);
String result = mSimpleStateMachine.transitionAndProcess(mMockFinalState, INPUT);
assertEquals(OUTPUT, result);
verify(mMockFinalState).process(INPUT);
}
@Test
public void testTransitionAndProcessToNull() {
try {
mSimpleStateMachine.transitionAndProcess(null, INPUT);
fail("IllegalArgumentException expected");
} catch (IllegalArgumentException expected) {
}
}
@Test
public void testProcessNullState() {
SimpleStateMachine simpleStateMachine = new SimpleStateMachine() {};
try {
simpleStateMachine.process(new Object());
fail("IllegalStateException expected");
} catch (IllegalStateException expected) {
}
}
}
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