ass1-jpa/src/test/java/dst/ass1/jpa/CaseInsensitiveStringCollectionMatcher.java

   1 package dst.ass1.jpa;
   2
   3 import java.util.ArrayList;
   4 import java.util.List;
   5
   6 import org.hamcrest.Description;
   7 import org.hamcrest.Factory;
   8 import org.hamcrest.TypeSafeDiagnosingMatcher;
   9
  10 /**
  11  * Matcher that finds items in string collections in a case-insensitive way.
  12  */
  13 public class CaseInsensitiveStringCollectionMatcher extends TypeSafeDiagnosingMatcher<List<String>> {
  14
  15     private final String[] items;
  16
  17     public CaseInsensitiveStringCollectionMatcher(String... items) {
  18         this.items = items;
  19     }
  20
  21     @Override
  22     protected boolean matchesSafely(List<String> collection, Description description) {
  23         List<String> missing = new ArrayList<>();
  24
  25         for (String item : items) {
  26             if (collection.stream().noneMatch(i -> i.equalsIgnoreCase(item))) {
  27                 missing.add(item);
  28             }
  29         }
  30
  31         if (!missing.isEmpty()) {
  32             if (missing.size() == items.length) {
  33                 description.appendValueList("was [", ", ", "]", collection);
  34             } else {
  35                 description.appendValueList("missing [", ", ", "]", missing)
  36                         .appendValueList(" in [", ", ", "]", collection);
  37             }
  38         }
  39
  40         return missing.isEmpty();
  41     }
  42
  43     @Override
  44     public void describeTo(Description description) {
  45         description.appendValueList("collection containing ", " and ", "", items);
  46     }
  47
  48     @Factory
  49     public static CaseInsensitiveStringCollectionMatcher hasItems(String... items) {
  50         return new CaseInsensitiveStringCollectionMatcher(items);
  51     }
  52 }