package org.hamcrest.core;

import org.hamcrest.Matcher;
import org.junit.Test;

import java.util.ArrayList;

import static java.util.Arrays.asList;
import static java.util.Collections.singletonList;
import static org.hamcrest.AbstractMatcherTest.*;
import static org.hamcrest.core.StringContains.containsString;

public final class EveryTest {

    
private final Matcher<Iterable<? extends String>> matcher = Every.everyItem(containsString("a"));

    
@Test public void
    
copesWithNullsAndUnknownTypes() {
        
assertNullSafe(matcher);
        
assertUnknownTypeSafe(matcher);
    
}

    
@Test public void
    
matchesOnlyWhenEveryItemMatches() {
        
assertMatches(matcher, asList("AaA", "BaB", "CaC"));
        
assertDoesNotMatch(matcher, asList("AaA", "BXB", "CaC"));
    
}

    
@Test public void
    
matchesEmptyLists() {
        
assertMatches("didn't match empty list", matcher, new ArrayList<String>());
    
}

    
@Test public void
    
describesItself() {
        
assertDescription("every item is a string containing \"a\"", matcher);
    
}

    
@Test public void
    
describesAMismatch() {
        
assertMismatchDescription("an item was \"BXB\"", matcher, singletonList("BXB"));
    
}
}