src/test/java/com/google/devtools/build/lib/rules/objc/ValueTest.java

// Copyright 2017 The Bazel Authors. 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.devtools.build.lib.rules.objc;

import static com.google.common.truth.Truth.assertThat;
import static org.junit.Assert.assertThrows;

import com.google.common.testing.EqualsTester;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;

/**
 * Unit tests for {@class Value}.
 */
@RunWith(JUnit4.class)
public class ValueTest {
  private static final class PersonName extends Value<PersonName> {
    public PersonName(String first, String last) {
      super(first, last);
    }
  }

  private enum NameData {
    JOHN_DOE, JANE_DOE, JOHN_SMITH,
  }

  private PersonName make(NameData what) {
    switch (what) {
      case JOHN_DOE:
        return new PersonName("John", "Doe");
      case JANE_DOE:
        return new PersonName("Jane", "Doe");
      case JOHN_SMITH:
        return new PersonName("John", "Smith");
      default:
        throw new IllegalArgumentException("unknown: " + what);
    }
  }

  @Test
  public void nullNotAllowedInMemberData() {
    assertThrows(NullPointerException.class, () -> new PersonName(null, "Doe"));
  }

  @Test
  public void equality() {
    EqualsTester tester = new EqualsTester();
    for (NameData what : NameData.values()) {
      tester.addEqualityGroup(make(what), make(what));
    }
    tester.testEquals();
  }

  @Test
  public void testToString() {
    assertThat(make(NameData.JOHN_DOE).toString()).contains("John");
    assertThat(make(NameData.JOHN_DOE).toString()).contains("Doe");
  }
}