/*
* Copyright 2014 Google Inc. All rights reserved.
*
* 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.google.errorprone.refaster;
import static com.google.common.truth.Truth.assertThat;
import com.google.common.base.Functions;
import com.google.common.base.Optional;
import com.google.common.base.Predicates;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.ImmutableMap;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;
/**
* Tests for {@code Choice}.
*
* @author lowasser@google.com (Louis Wasserman)
*/
@RunWith(JUnit4.class)
public class ChoiceTest {
@Test
public void testNone() {
assertThat(Choice.none().first()).isAbsent();
assertThat(Choice.none().condition(true)).isSameAs(Choice.none());
assertThat(Choice.none().condition(Predicates.alwaysTrue())).isSameAs(Choice.none());
assertThat(Choice.none().thenChoose(Functions.constant(Choice.of("foo")))).isSameAs(
Choice.none());
}
@Test
public void testThenOption() {
assertThat(Choice.from(ImmutableList.of(1, 2, 3)).thenOption(
Functions.forMap(ImmutableMap.of(2, Optional.of("foo")), Optional.<String>absent()))
.asIterable()).containsExactly("foo");
}
@Test
public void testThenChoose() {
assertThat(Choice.from(ImmutableList.of(1, 2, 3))
.thenChoose(Functions.forMap(ImmutableMap.of(2, Choice.of("foo")), Choice.<String>none()))
.asIterable()).containsExactly("foo");
}
@Test
public void testOr() {
assertThat(Choice.of(2).or(Choice.from(ImmutableList.of(1, 3))).asIterable())
.containsExactly(2, 1, 3).inOrder();
}
}