uk.org.lidalia.test.CombinableMatcher Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of lidalia-test Show documentation

A collection of useful common assertions & matchers for unit testing.

The newest version!

package uk.org.lidalia.test;

import java.util.ArrayList;
import java.util.List;

import org.hamcrest.Description;
import org.hamcrest.Factory;
import org.hamcrest.Matcher;
import org.hamcrest.TypeSafeDiagnosingMatcher;

class CombinableMatcher extends TypeSafeDiagnosingMatcher {
    private final Matcher matcher;

    CombinableMatcher(final Matcher matcher) {
        super();
        this.matcher = matcher;
    }

    @Override
    protected boolean matchesSafely(final T item, final Description mismatch) {
        if (!matcher.matches(item)) {
            matcher.describeMismatch(item, mismatch);
            return false;
        }
        return true;
    }

    @Override
    public void describeTo(final Description description) {
        description.appendDescriptionOf(matcher);
    }

    CombinableMatcher and(final Matcher other) {
        return new CombinableMatcher(new AllOf(templatedListWith(other)));
    }

    private List> templatedListWith(final Matcher other) {
        final List> matchers = new ArrayList>();
        matchers.add(matcher);
        matchers.add(other);
        return matchers;
    }

    /**
     * Creates a matcher that matches when both of the specified matchers match the examined object.
     * 
     * For example:
     * 
assertThat("fab", both(containsString("a")).and(containsString("b")))
     */
    @Factory
    static  CombinableMatcher both(final Matcher matcher) {
        return new CombinableMatcher(matcher);
    }
}