ElementsAreAllEqualMatcherTest.java

package cucumber.runtime.java.guice.matcher;

import org.hamcrest.Matcher;

import java.util.Arrays;
import java.util.Collection;

import static cucumber.runtime.java.guice.matcher.ElementsAreAllEqualMatcher.elementsAreAllEqual;

public class ElementsAreAllEqualMatcherTest extends AbstractMatcherTest {

    private final Matcher<Collection<?>> matcher = elementsAreAllEqual();

    @Override
    protected Matcher<?> createMatcher() {
        return matcher;
    }

    public void testDoesNotMatchNullCollection() {
        Collection<?> arg = null;
        assertDoesNotMatch(matcher, arg);
        assertMismatchDescription("was null", matcher, arg);
    }

    public void testDoesNotMatchCollectionWithLessThanTwoElements() {
        Collection<String> arg = Arrays.asList("foo");
        assertDoesNotMatch(matcher, arg);
        assertMismatchDescription("collection did not contain more than one element <[foo]>", matcher, arg);
    }

    public void testDoesNotMatchCollectionWithNullElements() {
        Collection<Object> arg = Arrays.asList(null, null);
        assertDoesNotMatch(matcher, arg);
        assertMismatchDescription("collection contained null element <[null, null]>", matcher, arg);
    }

    public void testMatchesCollectionWithTwoElementsThatAreEqual() {
        assertMatches(matcher, Arrays.asList("foo", "foo"));
    }

    public void testDoesNotMatchCollectionWithTwoElementsThatAreNotEqual() {
        Collection<String> arg = Arrays.asList("foo", "bar");
        assertDoesNotMatch(matcher, arg);
        assertMismatchDescription("collection contained elements that are not equal <[foo, bar]>", matcher, arg);
    }

    public void testMatchesCollectionWithThreeElementsThatAreEqual() {
        assertMatches(matcher, Arrays.asList("foo", "foo", "foo"));
    }

    public void testDoesNotMatchCollectionWithSomeElementsThatAreNotEqual() {
        Collection<String> arg = Arrays.asList("foo", "foo", "bar");
        assertDoesNotMatch(matcher, arg);
        assertMismatchDescription("collection contained elements that are not equal <[foo, foo, bar]>", matcher, arg);
    }

    public void testDoesNotMatchCollectionWithThreeElementsThatAreNotEqual() {
        Collection<String> arg = Arrays.asList("foo", "bar", "baz");
        assertDoesNotMatch(matcher, arg);
        assertMismatchDescription("collection contained elements that are not equal <[foo, bar, baz]>", matcher, arg);
    }

    public void testMatcherDescription() {
        assertDescription(ElementsAreAllEqualMatcher.DESCRIPTION, matcher);
    }
}