SelectorWebElementMatcher.java

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package io.wcm.qa.glnm.hamcrest.baseline;

import java.util.ArrayList;
import java.util.Collection;

import org.hamcrest.Description;
import org.hamcrest.Matcher;
import org.openqa.selenium.WebElement;

import io.wcm.qa.glnm.differences.base.Difference;
import io.wcm.qa.glnm.differences.difference.sut.SelectorDifference;
import io.wcm.qa.glnm.interaction.Element;
import io.wcm.qa.glnm.selectors.base.Selector;

class SelectorWebElementMatcher extends DifferentiatingMatcherBase<Selector> {

  private final Matcher<WebElement> matcher;

  SelectorWebElementMatcher(Matcher<WebElement> matcher) {
    this.matcher = matcher;
  }

  @Override
  protected Collection<? extends Difference> differencesFor(Selector item) {
    Collection<Difference> differences = new ArrayList<Difference>();
    differences.add(new SelectorDifference(item));
    return differences;
  }

  /** {@inheritDoc} */
  @Override
  public void describeTo(Description description) {
    matcher.describeTo(description);
  }

  @Override
  protected void describeMismatchSafely(Selector item, Description mismatchDescription) {
    matcher.describeMismatch(find(item), mismatchDescription);
  }

  @Override
  protected boolean matchesDifferentiated(Selector item) {
    return matcher.matches(find(item));
  }

  private WebElement find(Selector item) {
    return Element.find(item);
  }

}