com.analog.lyric.benchmarking.utils.doublespace.test.Utilities.java Source code

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/*******************************************************************************
 *   Copyright 2014 Analog Devices, Inc.
 *
 *   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.analog.lyric.benchmarking.utils.doublespace.test;

import static org.hamcrest.CoreMatchers.*;
import static org.hamcrest.MatcherAssert.*;

import java.util.Arrays;
import java.util.Iterator;

import org.eclipse.jdt.annotation.Nullable;
import com.google.common.base.Function;
import com.google.common.collect.Iterables;
import com.google.common.primitives.Booleans;
import com.google.common.primitives.Chars;
import com.google.common.primitives.Doubles;
import com.google.common.primitives.Floats;
import com.google.common.primitives.Ints;
import com.google.common.primitives.Longs;
import com.google.common.primitives.Shorts;

public class Utilities {
    private static Function<Object, String> stringify = new Function<Object, String>() {
        @Override
        public String apply(@Nullable Object o) {
            if (o instanceof Object[]) {
                return Arrays.deepToString((Object[]) o);
            } else if (o instanceof int[]) {
                return "[" + Ints.join(",  ", (int[]) o) + "]";
            } else if (o instanceof boolean[]) {
                return "[" + Booleans.join(",  ", (boolean[]) o) + "]";
            } else if (o instanceof short[]) {
                return "[" + Shorts.join(",  ", (short[]) o) + "]";
            } else if (o instanceof char[]) {
                return "[" + Chars.join(",  ", (char[]) o) + "]";
            } else if (o instanceof long[]) {
                return "[" + Longs.join(",  ", (long[]) o) + "]";
            } else if (o instanceof float[]) {
                return "[" + Floats.join(",  ", (float[]) o) + "]";
            } else if (o instanceof double[]) {
                return "[" + Doubles.join(",  ", (double[]) o) + "]";
            } else {
                return o + "";
            }
        }
    };

    private static <T> boolean compare(T a, T b) {
        if (a instanceof Object[]) {
            return Arrays.deepEquals((Object[]) a, (Object[]) b);
        } else {
            final Object[] box_a = new Object[] { a };
            final Object[] box_b = new Object[] { b };
            return Arrays.deepEquals(box_a, box_b);
        }
    }

    public static <T> void compareIterables(Iterable<T> expected, Iterable<T> actual) {
        boolean elementsEqual = true;
        final Iterator<T> it_expected = expected.iterator();
        final Iterator<T> it_actual = actual.iterator();
        String message = "equal elements";
        while (it_expected.hasNext() && it_actual.hasNext()) {
            final T an_expected = it_expected.next();
            final T an_actual = it_actual.next();
            elementsEqual &= compare(an_expected, an_actual);
        }
        elementsEqual &= it_expected.hasNext() == it_actual.hasNext();
        if (!elementsEqual) {
            final String expected_string = Iterables.toString(Iterables.transform(expected, stringify));
            final String actual_string = Iterables.toString(Iterables.transform(actual, stringify));
            message = String.format("Exected \"%s\",  actual \"%s\"", expected_string, actual_string);
        }
        assertThat(message, elementsEqual, equalTo(true));
    }

}