src/test/java/org/mockito/internal/verification/argumentmatching/ArgumentMatchingToolTest.java

/*
 * Copyright (c) 2007 Mockito contributors
 * This program is made available under the terms of the MIT License.
 */
package org.mockito.internal.verification.argumentmatching;

import org.junit.Test;
import org.mockito.ArgumentMatcher;
import org.mockito.internal.matchers.ContainsExtraTypeInfo;
import org.mockito.internal.matchers.Equals;
import org.mockitoutil.TestBase;

import java.util.Arrays;
import java.util.Collections;
import java.util.List;

import static java.util.Collections.singletonList;
import static junit.framework.TestCase.assertEquals;
import static org.junit.Assert.*;

@SuppressWarnings({ "unchecked", "serial" })
public class ArgumentMatchingToolTest extends TestBase {

    @Test
    public void shouldNotFindAnySuspiciousMatchersWhenNumberOfArgumentsDoesntMatch() {
        // given
        List<ArgumentMatcher> matchers = (List) Arrays.asList(new Equals(1));

        // when
        Integer[] suspicious = ArgumentMatchingTool.getSuspiciouslyNotMatchingArgsIndexes(matchers, new Object[] { 10, 20 });

        // then
        assertEquals(0, suspicious.length);
    }

    @Test
    public void shouldNotFindAnySuspiciousMatchersWhenArgumentsMatch() {
        // given
        List<ArgumentMatcher> matchers = (List) Arrays.asList(new Equals(10), new Equals(20));

        // when
        Integer[] suspicious = ArgumentMatchingTool.getSuspiciouslyNotMatchingArgsIndexes(matchers, new Object[] { 10, 20 });

        // then
        assertEquals(0, suspicious.length);
    }

    @Test
    public void shouldFindSuspiciousMatchers() {
        // given
        Equals matcherInt20 = new Equals(20);
        Long longPretendingAnInt = 20L;

        // when
        List<ArgumentMatcher> matchers = (List) Arrays.asList(new Equals(10), matcherInt20);
        Integer[] suspicious = ArgumentMatchingTool.getSuspiciouslyNotMatchingArgsIndexes(matchers, new Object[] { 10, longPretendingAnInt });

        // then
        assertEquals(1, suspicious.length);
        assertEquals(new Integer(1), suspicious[0]);
    }

    @Test
    public void shouldNotFindSuspiciousMatchersWhenTypesAreTheSame() {
        // given
        Equals matcherWithBadDescription = new Equals(20) {
            public String toString() {
                return "10";
            }
        };
        Integer argument = 10;

        // when
        Integer[] suspicious = ArgumentMatchingTool.getSuspiciouslyNotMatchingArgsIndexes((List) Arrays.asList(matcherWithBadDescription), new Object[] { argument });

        // then
        assertEquals(0, suspicious.length);
    }

    @Test
    public void shouldWorkFineWhenGivenArgIsNull() {
        // when
        Integer[] suspicious = ArgumentMatchingTool.getSuspiciouslyNotMatchingArgsIndexes((List) Arrays.asList(new Equals(20)), new Object[] { null });

        // then
        assertEquals(0, suspicious.length);
    }


    /**
     *
     */
    @Test
    @SuppressWarnings("rawtypes")
    public void shouldUseMatchersSafely() {
        /** This matcher is evil cause typeMatches(Object) returns true for every passed type but matches(T)
         * method accepts only Strings. When a Integer is passed (thru the matches(Object) bridge method )  a
         * ClassCastException will be thrown. */
        class StringMatcher implements ArgumentMatcher<String>, ContainsExtraTypeInfo {
            @Override
            public boolean matches(String item) {
                return true; // in this test we never get here
            }

            @Override
            public String toStringWithType() {
                return "";
            }

            @Override
            public boolean typeMatches(Object target) {
                return true;
            }
        }

        // given
        List<ArgumentMatcher> matchers = (List) singletonList(new StringMatcher());

        // when
        Integer[] suspicious = ArgumentMatchingTool.getSuspiciouslyNotMatchingArgsIndexes(matchers, new Object[] { 10 });

        // then
        assertEquals(0, suspicious.length);
    }

}