GroupAssert_isEmpty_Test.java

/*
 * Created on Sep 8, 2009
 * 
 * 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.
 * 
 * Copyright @2009-2013 the original author or authors.
 */
package org.fest.assertions;

import org.fest.test.ExpectedException;
import org.junit.BeforeClass;
import org.junit.Rule;
import org.junit.Test;

import java.util.List;

import static java.util.Collections.emptyList;
import static org.fest.assertions.FailureMessages.actualIsNull;
import static org.fest.test.ExpectedException.none;
import static org.fest.util.Lists.newArrayList;
import static org.fest.util.ToString.toStringOf;

/**
 * Tests for {@link GroupAssert#isEmpty()}.
 *
 * @author Alex Ruiz
 */
public final class GroupAssert_isEmpty_Test {
  @Rule
  public ExpectedException thrown = none();

  private static List<String> actual;
  private static TestObjectGroupAssert assertions;

  @BeforeClass
  public static void setUpOnce() {
    actual = newArrayList("Hello");
    assertions = new TestObjectGroupAssert(actual);
  }

  @Test
  public final void should_pass_if_actual_is_empty() {
    new TestObjectGroupAssert(emptyList()).isEmpty();
  }

  @Test
  public final void should_fail_if_actual_is_null() {
    thrown.expect(AssertionError.class, actualIsNull());
    new TestObjectGroupAssert(null).isEmpty();
  }

  @Test
  public final void should_fail_and_display_description_if_actual_is_null() {
    thrown.expect(AssertionError.class, actualIsNull("A Test"));
    new TestObjectGroupAssert(null).as("A Test").isEmpty();
  }

  @Test
  public final void should_fail_if_actual_is_not_empty() {
    thrown.expect(AssertionError.class, String.format("expecting empty, but was:<%s>", toStringOf(actual)));
    assertions.isEmpty();
  }

  @Test
  public final void should_fail_and_display_description_if_actual_is_not_empty() {
    thrown.expect(AssertionError.class, String.format("[A Test] expecting empty, but was:<%s>", toStringOf(actual)));
    assertions.as("A Test").isEmpty();
  }

  @Test
  public final void should_fail_with_custom_message_if_actual_is_not_empty() {
    thrown.expect(AssertionError.class, "My custom message");
    assertions.overridingErrorMessage("My custom message").isEmpty();
  }

  @Test
  public final void should_fail_with_custom_message_ignoring_description_if_actual_is_not_empty() {
    thrown.expect(AssertionError.class, "My custom message");
    assertions.as("A Test").overridingErrorMessage("My custom message").isEmpty();
  }
}