102 lines
3.7 KiB
Java
102 lines
3.7 KiB
Java
/*
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* Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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import java.util.regex.Pattern;
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import static java.util.Objects.requireNonNull;
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//
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// A set of testing utility functions
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//
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public final class TestKit {
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private TestKit() { }
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public static void assertNotThrows(ThrowingProcedure code) {
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requireNonNull(code, "code");
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assertNotThrows(() -> {
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code.run();
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return null;
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});
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}
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public static <V> V assertNotThrows(ThrowingFunction<V> code) {
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requireNonNull(code, "code");
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try {
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return code.run();
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} catch (Throwable t) {
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throw new RuntimeException("Expected to run normally, but threw "
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+ t.getClass().getCanonicalName(), t);
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}
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}
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public static <T extends Throwable> T assertThrows(Class<? extends T> clazz,
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ThrowingProcedure code) {
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requireNonNull(clazz, "clazz");
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requireNonNull(code, "code");
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try {
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code.run();
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} catch (Throwable t) {
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if (clazz.isInstance(t)) {
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return clazz.cast(t);
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}
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throw new RuntimeException("Expected to catch an exception of type "
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+ clazz.getCanonicalName() + ", but caught "
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+ t.getClass().getCanonicalName(), t);
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}
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throw new RuntimeException("Expected to catch an exception of type "
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+ clazz.getCanonicalName() + ", but caught nothing");
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}
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public interface ThrowingProcedure {
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void run() throws Throwable;
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}
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public interface ThrowingFunction<V> {
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V run() throws Throwable;
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}
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// The rationale behind asking for a regex is to not pollute variable names
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// space in the scope of assertion: if it's something as simple as checking
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// a message, we can do it inside
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public static <T extends Throwable> T assertThrows(Class<? extends T> clazz,
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String messageRegex,
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ThrowingProcedure code) {
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requireNonNull(messageRegex, "messagePattern");
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T t = assertThrows(clazz, code);
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String m = t.getMessage();
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if (m == null) {
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throw new RuntimeException(String.format(
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"Expected exception message to match the regex '%s', " +
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"but the message was null", messageRegex), t);
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}
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if (!Pattern.matches(messageRegex, m)) {
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throw new RuntimeException(String.format(
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"Expected exception message to match the regex '%s', " +
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"actual message: %s", messageRegex, m), t);
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}
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return t;
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}
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}
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