src/test/java/net/pterodactylus/sone/Matchers.java

   1 /*
   2  * Sone - Matchers.java - Copyright © 2013 David Roden
   3  *
   4  * This program is free software: you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation, either version 3 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  16  */
  17
  18 package net.pterodactylus.sone;
  19
  20 import static com.google.common.base.Objects.equal;
  21 import static com.google.common.collect.Iterators.size;
  22 import static java.util.Arrays.asList;
  23 import static java.util.regex.Pattern.compile;
  24
  25 import java.io.IOException;
  26 import java.io.InputStream;
  27 import java.util.Collection;
  28 import java.util.Iterator;
  29 import java.util.List;
  30
  31 import freenet.support.SimpleFieldSet;
  32
  33 import com.google.common.base.Objects;
  34 import com.google.common.collect.Lists;
  35 import org.hamcrest.Description;
  36 import org.hamcrest.Matcher;
  37 import org.hamcrest.TypeSafeMatcher;
  38
  39 /**
  40  * Matchers used throughout the tests.
  41  *
  42  * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
  43  */
  44 public class Matchers {
  45
  46         public static Matcher<String> matches(final String regex) {
  47                 return new TypeSafeMatcher<String>() {
  48                         @Override
  49                         protected boolean matchesSafely(String item) {
  50                                 return compile(regex).matcher(item).find();
  51                         }
  52
  53                         @Override
  54                         public void describeTo(Description description) {
  55                                 description.appendText("matches: ").appendValue(regex);
  56                         }
  57                 };
  58         }
  59
  60         public static <T> Matcher<Iterator<T>> contains(T... items) {
  61                 return contains(asList(items));
  62         }
  63
  64         public static <T> Matcher<Iterator<T>> contains(final Collection<T> items) {
  65                 return new TypeSafeMatcher<Iterator<T>>() {
  66                         @Override
  67                         protected boolean matchesSafely(Iterator<T> iterator) {
  68                                 for (T item : items) {
  69                                         if (!iterator.hasNext()) {
  70                                                 return false;
  71                                         }
  72                                         T nextItem = iterator.next();
  73                                         if (!Objects.equal(item, nextItem)) {
  74                                                 return false;
  75                                         }
  76                                 }
  77                                 if (iterator.hasNext()) {
  78                                         return false;
  79                                 }
  80                                 return true;
  81                         }
  82
  83                         @Override
  84                         public void describeTo(Description description) {
  85                                 description.appendText("contains ").appendValue(items);
  86                         }
  87                 };
  88         }
  89
  90         public static <T> Matcher<Iterator<T>> containsInAnyOrder(T... items) {
  91                 return containsInAnyOrder(asList(items));
  92         }
  93
  94         public static <T> Matcher<Iterator<T>> containsInAnyOrder(final Collection<T> items) {
  95                 return new TypeSafeMatcher<Iterator<T>>() {
  96                         private final List<T> remainingItems = Lists.newArrayList(items);
  97                         @Override
  98                         protected boolean matchesSafely(Iterator<T> iterator) {
  99                                 while (iterator.hasNext()) {
 100                                         T item = iterator.next();
 101                                         if (remainingItems.isEmpty()) {
 102                                                 return false;
 103                                         }
 104                                         if (!remainingItems.remove(item)) {
 105                                                 return false;
 106                                         }
 107                                 }
 108                                 if (!remainingItems.isEmpty()) {
 109                                         return false;
 110                                 }
 111                                 return true;
 112                         }
 113
 114                         @Override
 115                         public void describeTo(Description description) {
 116                                 description.appendText("contains ").appendValue(items);
 117                         }
 118                 };
 119         }
 120
 121         public static Matcher<InputStream> delivers(final byte[] data) {
 122                 return new TypeSafeMatcher<InputStream>() {
 123                         byte[] readData = new byte[data.length];
 124
 125                         @Override
 126                         protected boolean matchesSafely(InputStream inputStream) {
 127                                 int offset = 0;
 128                                 try {
 129                                         while (true) {
 130                                                 int r = inputStream.read();
 131                                                 if (r == -1) {
 132                                                         return offset == data.length;
 133                                                 }
 134                                                 if (offset == data.length) {
 135                                                         return false;
 136                                                 }
 137                                                 if (data[offset] != (readData[offset] = (byte) r)) {
 138                                                         return false;
 139                                                 }
 140                                                 offset++;
 141                                         }
 142                                 } catch (IOException ioe1) {
 143                                         return false;
 144                                 }
 145                         }
 146
 147                         @Override
 148                         public void describeTo(Description description) {
 149                                 description.appendValue(data);
 150                         }
 151
 152                         @Override
 153                         protected void describeMismatchSafely(InputStream item, Description mismatchDescription) {
 154                                 mismatchDescription.appendValue(readData);
 155                         }
 156                 };
 157         }
 158
 159         public static Matcher<SimpleFieldSet> matches(final SimpleFieldSet fieldSetToMatch) {
 160                 return new TypeSafeMatcher<SimpleFieldSet>() {
 161                         @Override
 162                         protected boolean matchesSafely(SimpleFieldSet fieldSet) {
 163                                 if (size(fieldSet.keyIterator()) != size(fieldSetToMatch.keyIterator())) {
 164                                         return false;
 165                                 }
 166                                 for (Iterator<String> keys = fieldSetToMatch.keyIterator(); keys.hasNext(); ) {
 167                                         String key = keys.next();
 168                                         if (!equal(fieldSet.get(key), fieldSetToMatch.get(key))) {
 169                                                 return false;
 170                                         }
 171                                 }
 172                                 return true;
 173                         }
 174
 175                         @Override
 176                         public void describeTo(Description description) {
 177                                 description.appendText("is ").appendValue(fieldSetToMatch);
 178                         }
 179                 };
 180         }
 181
 182 }