/*-
 * #%L
 * PropertiesFramework :: Core
 * %%
 * Copyright (C) 2017 LeanFrameworks
 * %%
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 * modification, are permitted provided that the following conditions are met:
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package com.github.leanframeworks.propertiesframework.base.transform.collection;

import com.github.leanframeworks.propertiesframework.api.transform.Transformer;
import org.junit.Test;

import java.util.ArrayList;
import java.util.Collection;

import static org.junit.Assert.assertEquals;

/**
 * @see GetCollectionSizeTransformer
 */
public class GetCollectionSizeTransformerTest {

    @Test
    public void testNonNull() {
        Transformer<Collection<?>, Integer> transformer = new GetCollectionSizeTransformer();

        Collection<String> collection = new ArrayList<>();
        assertEquals(Integer.valueOf(0), transformer.transform(collection));

        collection.add("One");
        assertEquals(Integer.valueOf(1), transformer.transform(collection));

        collection.add("Two");
        assertEquals(Integer.valueOf(2), transformer.transform(collection));

        collection.add("Three");
        assertEquals(Integer.valueOf(3), transformer.transform(collection));

        collection.clear();
        assertEquals(Integer.valueOf(0), transformer.transform(collection));
    }
}
