/*
 * Copyright 2012-2017 JetBrains s.r.o
 *
 * 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 jetbrains.jetpad.model.transform;

import jetbrains.jetpad.base.Registration;
import jetbrains.jetpad.base.function.Function;
import jetbrains.jetpad.model.collections.ObservableCollection;
import jetbrains.jetpad.model.collections.set.ObservableHashSet;
import jetbrains.jetpad.model.collections.set.ObservableSet;
import org.junit.Before;
import org.junit.Test;

import static junit.framework.TestCase.assertFalse;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;

public class FilterByConstantTest {
  private ObservableSet<String> items = new ObservableHashSet<>();
  private ObservableSet<String> target = new ObservableHashSet<>();
  private Registration myReg;

  @Before
  public void setup() {
    Transformer<ObservableSet<String>, ObservableCollection<String>> trans = Transformers.filterByConstant(new Function<String, Boolean>() {
      @Override
      public Boolean apply(String input) {
        return input.startsWith("a");
      }
    });
    final Transformation<ObservableSet<String>, ObservableCollection<String>> transformation = trans.transform(items, target);
    myReg = new Registration() {
      @Override
      protected void doRemove() {
        transformation.dispose();
      }
    };
  }

  @Test
  public void simpleAdd() {
    items.add("aaa");
    items.add("bbb");

    assertEquals(1, target.size());
    assertTrue(target.contains("aaa"));
    assertFalse(target.contains("bbb"));
  }

  @Test
  public void simpleRemove() {
    items.add("aaa");
    items.add("bbb");

    items.remove("bbb");

    assertFalse(target.isEmpty());

    items.remove("aaa");

    assertTrue(target.isEmpty());
  }

  @Test
  public void dispose() {
    items.add("aaa");
    items.add("bbb");

    myReg.dispose();

    assertTrue(target.isEmpty());
  }
}
@@ -986,44 +986,37 @@
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@@ -1042,38 +1042,37 @@
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fix "usage of obsolete 'junit.framework.Assert' method" warnings