/*
* Copyright 2014 Goldman Sachs.
*
* 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.gs.collections.impl.block.function;
import com.gs.collections.api.block.function.Function;
import com.gs.collections.impl.block.factory.Comparators;
import com.gs.collections.impl.block.factory.Functions;
import com.gs.collections.impl.block.factory.Predicates;
import com.gs.collections.impl.test.Verify;
import org.junit.Assert;
import org.junit.Test;
public class CaseFunctionTest
{
@Test
public void noopCase()
{
CaseFunction<Integer, Integer> function = new CaseFunction<>();
Assert.assertNull(function.valueOf(42));
}
@Test
public void basicCase()
{
CaseFunction<Integer, Integer> function = new CaseFunction<>();
function.addCase(ignored -> true, Functions.getIntegerPassThru());
Integer fortyTwo = 42;
Assert.assertEquals(fortyTwo, function.valueOf(fortyTwo));
}
@Test
public void defaultValue()
{
CaseFunction<Foo, String> function = Functions.caseDefault(
Functions.getFixedValue("Yow!"),
Predicates.attributeGreaterThan(Foo.TO_VALUE, 5.0D),
Functions.getFixedValue("Patience, grasshopper"));
Assert.assertEquals("Yow!", function.valueOf(new Foo("", 1.0D)));
function.setDefault(Functions.getFixedValue("Patience, young grasshopper"));
Assert.assertEquals("Patience, grasshopper", function.valueOf(new Foo("", 6.0D)));
Assert.assertEquals("Patience, young grasshopper", function.valueOf(new Foo("", 1.0D)));
Verify.assertContains("CaseFunction", function.toString());
}
public static final class Foo implements Comparable<Foo>
{
public static final Function<Foo, Double> TO_VALUE = new Function<Foo, Double>()
{
public Double valueOf(Foo foo)
{
return foo.value;
}
};
private final String description;
private final double value;
private Foo(String description, double value)
{
this.description = description;
this.value = value;
}
@Override
public boolean equals(Object o)
{
if (this == o)
{
return true;
}
if (o == null || this.getClass() != o.getClass())
{
return false;
}
Foo foo = (Foo) o;
if (Double.compare(foo.value, this.value) != 0)
{
return false;
}
return Comparators.nullSafeEquals(this.description, foo.description);
}
@Override
public int hashCode()
{
int result = this.description == null ? 0 : this.description.hashCode();
long l = Double.doubleToLongBits(this.value);
result = 31 * result + (int) (l ^ l >>> 32);
return result;
}
@Override
public int compareTo(Foo o)
{
throw new RuntimeException("compareTo not implemented");
}
}
}