1 /*
2 * Copyright 2011-2024 the original author or authors.
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * https://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16 package com.googlecode.catchexception.throwable.apis.internal.hamcrest;
17
18 import org.hamcrest.BaseMatcher;
19 import org.hamcrest.Description;
20 import org.hamcrest.Matcher;
21
22 /**
23 * Creates a {@link Matcher matcher} that matches an throwable that has no {@link Throwable#getCause() cause}.
24 *
25 * @param <T>
26 * an throwable subclass
27 */
28 public class ThrowableNoCauseMatcher<T extends Throwable> extends BaseMatcher<T> {
29
30 @Override
31 public boolean matches(Object obj) {
32 if (!(obj instanceof Throwable)) {
33 return false;
34 }
35
36 var throwable = (Throwable) obj;
37
38 return throwable.getCause() == null;
39 }
40
41 @Override
42 public void describeTo(Description description) {
43 description.appendText("has no cause");
44 }
45
46 }