Source code

001// ***************************************************************************************************************************
002// * Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements.  See the NOTICE file *
003// * distributed with this work for additional information regarding copyright ownership.  The ASF licenses this file        *
004// * to you under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance            *
005// * with the License.  You may obtain a copy of the License at                                                              *
006// *                                                                                                                         *
007// *  http://www.apache.org/licenses/LICENSE-2.0                                                                             *
008// *                                                                                                                         *
009// * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an  *
010// * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the License for the        *
011// * specific language governing permissions and limitations under the License.                                              *
012// ***************************************************************************************************************************
013package org.apache.juneau.assertions;
014
015import static org.apache.juneau.internal.ObjectUtils.*;
016
017import java.io.*;
018import java.util.*;
019import java.util.function.*;
020import java.util.stream.*;
021
022import org.apache.juneau.common.internal.StringUtils;
023import org.apache.juneau.cp.*;
024import org.apache.juneau.internal.*;
025import org.apache.juneau.serializer.*;
026
027/**
028 * Used for fluent assertion calls against collections objects.
029 *
030 * <h5 class='section'>Test Methods:</h5>
031 * <p>
032 * <ul class='javatree'>
033 *    <li class='jc'>{@link FluentCollectionAssertion}
034 *    <ul class='javatreec'>
035 *       <li class='jm'>{@link FluentCollectionAssertion#isEmpty() isEmpty()}
036 *       <li class='jm'>{@link FluentCollectionAssertion#isNotEmpty() isNotEmpty()}
037 *       <li class='jm'>{@link FluentCollectionAssertion#isContains(Object) isContains(Object)}
038 *       <li class='jm'>{@link FluentCollectionAssertion#isNotContains(Object) isNotContains(Object)}
039 *       <li class='jm'>{@link FluentCollectionAssertion#isAny(Predicate) isAny(Predicate)}
040 *       <li class='jm'>{@link FluentCollectionAssertion#isAll(Predicate) isAll(Predicate)}
041 *       <li class='jm'>{@link FluentCollectionAssertion#isSize(int size) isSize(int size)}
042 *    </ul>
043 *    <li class='jc'>{@link FluentObjectAssertion}
044 *    <ul class='javatreec'>
045 *       <li class='jm'>{@link FluentObjectAssertion#isExists() isExists()}
046 *       <li class='jm'>{@link FluentObjectAssertion#is(Object) is(Object)}
047 *       <li class='jm'>{@link FluentObjectAssertion#is(Predicate) is(Predicate)}
048 *       <li class='jm'>{@link FluentObjectAssertion#isNot(Object) isNot(Object)}
049 *       <li class='jm'>{@link FluentObjectAssertion#isAny(Object...) isAny(Object...)}
050 *       <li class='jm'>{@link FluentObjectAssertion#isNotAny(Object...) isNotAny(Object...)}
051 *       <li class='jm'>{@link FluentObjectAssertion#isNull() isNull()}
052 *       <li class='jm'>{@link FluentObjectAssertion#isNotNull() isNotNull()}
053 *       <li class='jm'>{@link FluentObjectAssertion#isString(String) isString(String)}
054 *       <li class='jm'>{@link FluentObjectAssertion#isJson(String) isJson(String)}
055 *       <li class='jm'>{@link FluentObjectAssertion#isSame(Object) isSame(Object)}
056 *       <li class='jm'>{@link FluentObjectAssertion#isSameJsonAs(Object) isSameJsonAs(Object)}
057 *       <li class='jm'>{@link FluentObjectAssertion#isSameSortedJsonAs(Object) isSameSortedJsonAs(Object)}
058 *       <li class='jm'>{@link FluentObjectAssertion#isSameSerializedAs(Object, WriterSerializer) isSameSerializedAs(Object, WriterSerializer)}
059 *       <li class='jm'>{@link FluentObjectAssertion#isType(Class) isType(Class)}
060 *       <li class='jm'>{@link FluentObjectAssertion#isExactType(Class) isExactType(Class)}
061 *    </ul>
062 * </ul>
063 *
064 * <h5 class='section'>Transform Methods:</h5>
065 * <p>
066 * <ul class='javatree'>
067 *    <li class='jc'>{@link FluentCollectionAssertion}
068 *    <ul class='javatreec'>
069 *       <li class='jm'>{@link FluentCollectionAssertion#asStrings() asStrings()}
070 *       <li class='jm'>{@link FluentCollectionAssertion#asSize() asSize()}
071 *    </ul>
072 *    <li class='jc'>{@link FluentObjectAssertion}
073 *    <ul class='javatreec'>
074 *       <li class='jm'>{@link FluentObjectAssertion#asString() asString()}
075 *       <li class='jm'>{@link FluentObjectAssertion#asString(WriterSerializer) asString(WriterSerializer)}
076 *       <li class='jm'>{@link FluentObjectAssertion#asString(Function) asString(Function)}
077 *       <li class='jm'>{@link FluentObjectAssertion#asJson() asJson()}
078 *       <li class='jm'>{@link FluentObjectAssertion#asJsonSorted() asJsonSorted()}
079 *       <li class='jm'>{@link FluentObjectAssertion#asTransformed(Function) asApplied(Function)}
080 *       <li class='jm'>{@link FluentObjectAssertion#asAny() asAny()}
081 * </ul>
082 * </ul>
083 *
084 * <h5 class='section'>Configuration Methods:</h5>
085 * <p>
086 * <ul class='javatree'>
087 *    <li class='jc'>{@link Assertion}
088 *    <ul class='javatreec'>
089 *       <li class='jm'>{@link Assertion#setMsg(String, Object...) setMsg(String, Object...)}
090 *       <li class='jm'>{@link Assertion#setOut(PrintStream) setOut(PrintStream)}
091 *       <li class='jm'>{@link Assertion#setSilent() setSilent()}
092 *       <li class='jm'>{@link Assertion#setStdOut() setStdOut()}
093 *       <li class='jm'>{@link Assertion#setThrowable(Class) setThrowable(Class)}
094 *    </ul>
095 * </ul>
096 *
097 * <h5 class='section'>See Also:</h5><ul>
098 *    <li class='link'><a class="doclink" href="../../../../index.html#ja.Overview">Overview &gt; juneau-assertions &gt; Overview</a>
099 * </ul>
100 *
101 * @param <E> The element type.
102 * @param <R> The return type.
103 */
104@FluentSetters(returns="FluentCollectionAssertion<E,R>")
105public class FluentCollectionAssertion<E,R> extends FluentObjectAssertion<Collection<E>,R> {
106
107   //-----------------------------------------------------------------------------------------------------------------
108   // Static
109   //-----------------------------------------------------------------------------------------------------------------
110
111   private static final Messages MESSAGES = Messages.of(FluentCollectionAssertion.class, "Messages");
112   private static final String
113      MSG_collectionWasNotEmpty = MESSAGES.getString("collectionWasNotEmpty"),
114      MSG_collectionDidNotContainExpectedValue = MESSAGES.getString("collectionDidNotContainExpectedValue"),
115      MSG_collectionDidNotContainTestedValue = MESSAGES.getString("collectionDidNotContainTestedValue"),
116      MSG_collectionContainedUnexpectedValue = MESSAGES.getString("collectionContainedUnexpectedValue"),
117      MSG_collectionWasEmpty = MESSAGES.getString("collectionWasEmpty"),
118      MSG_collectionDidNotHaveExpectedSize = MESSAGES.getString("collectionDidNotHaveExpectedSize");
119
120   //-----------------------------------------------------------------------------------------------------------------
121   // Instance
122   //-----------------------------------------------------------------------------------------------------------------
123
124   /**
125    * Constructor.
126    *
127    * @param value
128    *    The object being tested.
129    *    <br>Can be <jk>null</jk>.
130    * @param returns
131    *    The object to return after a test method is called.
132    *    <br>If <jk>null</jk>, the test method returns this object allowing multiple test method calls to be
133    * used on the same assertion.
134    */
135   public FluentCollectionAssertion(Collection<E> value, R returns) {
136      this(null, value, returns);
137   }
138
139   /**
140    * Chained constructor.
141    *
142    * <p>
143    * Used when transforming one assertion into another so that the assertion config can be used by the new assertion.
144    *
145    * @param creator
146    *    The assertion that created this assertion.
147    *    <br>Should be <jk>null</jk> if this is the top-level assertion.
148    * @param value
149    *    The object being tested.
150    *    <br>Can be <jk>null</jk>.
151    * @param returns
152    *    The object to return after a test method is called.
153    *    <br>If <jk>null</jk>, the test method returns this object allowing multiple test method calls to be
154    * used on the same assertion.
155    */
156   public FluentCollectionAssertion(Assertion creator, Collection<E> value, R returns) {
157      super(creator, value, returns);
158   }
159
160   //-----------------------------------------------------------------------------------------------------------------
161   // Transform methods
162   //-----------------------------------------------------------------------------------------------------------------
163
164   @Override /* FluentObjectAssertion */
165   public FluentCollectionAssertion<E,R> asTransformed(Function<Collection<E>,Collection<E>> function) {
166      return new FluentCollectionAssertion<>(this, function.apply(orElse(null)), returns());
167   }
168
169   /**
170    * Converts this assertion into a {@link FluentListAssertion} of strings.
171    *
172    * @return A new fluent string assertion.
173    */
174   public FluentStringListAssertion<R> asStrings() {
175      return new FluentStringListAssertion<>(this, valueIsNull() ? null : value().stream().map(StringUtils::stringify).collect(Collectors.toList()), returns());
176   }
177
178
179   /**
180    * Returns an integer assertion on the size of this collection.
181    *
182    * <p>
183    * If the collection is <jk>null</jk>, the returned assertion is a null assertion
184    * (meaning {@link FluentIntegerAssertion#isExists()} returns <jk>false</jk>).
185    *
186    * @return A new assertion.
187    */
188   public FluentIntegerAssertion<R> asSize() {
189      return new FluentIntegerAssertion<>(this, valueIsNull() ? null : value().size(), returns());
190   }
191
192   //-----------------------------------------------------------------------------------------------------------------
193   // Test methods
194   //-----------------------------------------------------------------------------------------------------------------
195
196   /**
197    * Asserts that the collection exists and is empty.
198    *
199    * @return The fluent return object.
200    * @throws AssertionError If assertion failed or value was <jk>null</jk>.
201    */
202   public R isEmpty() throws AssertionError {
203      if (! value().isEmpty())
204         throw error(MSG_collectionWasNotEmpty);
205      return returns();
206   }
207
208   /**
209    * Asserts that the collection exists and is not empty.
210    *
211    * @return The fluent return object.
212    * @throws AssertionError If assertion failed or value was <jk>null</jk>.
213    */
214   public R isNotEmpty() throws AssertionError {
215      if (value().isEmpty())
216         throw error(MSG_collectionWasEmpty);
217      return returns();
218   }
219
220   /**
221    * Asserts that the collection contains the expected value.
222    *
223    * @param entry The value to check for.
224    * @return The fluent return object.
225    * @throws AssertionError If assertion failed or value was <jk>null</jk>.
226    */
227   public R isContains(E entry) throws AssertionError {
228      for (Object v : value())
229         if (eq(v, entry))
230            return returns();
231      throw error(MSG_collectionDidNotContainExpectedValue, entry, value());
232   }
233
234   /**
235    * Asserts that the collection contains the expected value.
236    *
237    * @param entry The value to check for.
238    * @return The fluent return object.
239    * @throws AssertionError If assertion failed or value was <jk>null</jk>.
240    */
241   public R isNotContains(E entry) throws AssertionError {
242      value().forEach(x -> {
243         if (eq(x, entry))
244            throw error(MSG_collectionContainedUnexpectedValue, entry, value());
245      });
246      return returns();
247   }
248
249   /**
250    * Asserts that at least one value in the collection passes the specified test.
251    *
252    * @param test The predicate test.
253    * @return The fluent return object.
254    * @throws AssertionError If assertion failed or value was <jk>null</jk>.
255    */
256   public R isAny(Predicate<E> test) throws AssertionError {
257      if (test == null)
258         return returns();
259      for (E v : value())
260         if (test.test(v))
261            return returns();
262      throw error(MSG_collectionDidNotContainTestedValue, value());
263   }
264
265   /**
266    * Asserts that all values in the collection pass the specified test.
267    *
268    * @param test The predicate test.
269    * @return The fluent return object.
270    * @throws AssertionError If assertion failed or value was <jk>null</jk>.
271    */
272   public R isAll(Predicate<E> test) throws AssertionError {
273      if (test == null)
274         return returns();
275      value().forEach(x -> {
276         if (! test.test(x))
277            throw error(MSG_collectionDidNotContainTestedValue, value());
278      });
279      return returns();
280   }
281
282   /**
283    * Asserts that the collection exists and is the specified size.
284    *
285    * @param size The expected size.
286    * @return The fluent return object.
287    * @throws AssertionError If assertion failed or value was <jk>null</jk>.
288    */
289   public R isSize(int size) throws AssertionError {
290      if (getSize() != size)
291         throw error(MSG_collectionDidNotHaveExpectedSize, size, getSize());
292      return returns();
293   }
294
295   //-----------------------------------------------------------------------------------------------------------------
296   // Fluent setters
297   //-----------------------------------------------------------------------------------------------------------------
298
299   // <FluentSetters>
300
301   @Override /* GENERATED - org.apache.juneau.assertions.Assertion */
302   public FluentCollectionAssertion<E,R> setMsg(String msg, Object...args) {
303      super.setMsg(msg, args);
304      return this;
305   }
306
307   @Override /* GENERATED - org.apache.juneau.assertions.Assertion */
308   public FluentCollectionAssertion<E,R> setOut(PrintStream value) {
309      super.setOut(value);
310      return this;
311   }
312
313   @Override /* GENERATED - org.apache.juneau.assertions.Assertion */
314   public FluentCollectionAssertion<E,R> setSilent() {
315      super.setSilent();
316      return this;
317   }
318
319   @Override /* GENERATED - org.apache.juneau.assertions.Assertion */
320   public FluentCollectionAssertion<E,R> setStdOut() {
321      super.setStdOut();
322      return this;
323   }
324
325   @Override /* GENERATED - org.apache.juneau.assertions.Assertion */
326   public FluentCollectionAssertion<E,R> setThrowable(Class<? extends java.lang.RuntimeException> value) {
327      super.setThrowable(value);
328      return this;
329   }
330
331   // </FluentSetters>
332
333   //-----------------------------------------------------------------------------------------------------------------
334   // Utility methods
335   //-----------------------------------------------------------------------------------------------------------------
336
337   /**
338    * Returns the size of this collection if it is not <jk>null</jk>.
339    *
340    * @return the size of this collection if it is not <jk>null</jk>.
341    * @throws AssertionError If value was <jk>null</jk>.
342    */
343   protected int getSize() throws AssertionError {
344      return value().size();
345   }
346}