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/*
* Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package selectionresolution;
import java.util.function.Consumer;
import java.util.Collection;
import java.util.LinkedList;
import java.util.List;
/**
* A master superclass for all selection/resolution tests. Contains a
* couple of standard definitions that make writing these tests
* easier.
*/
public abstract class SelectionResolutionTest {
/**
* A unified output function, to ensure that all output goes to
* the right string (System.err).
*
* @param str The line to print.
*/
protected void println(final String str) {
System.err.println(str);
}
/**
* A test group is a generator for a set of tests that should
* share common characteristics. The Simple class provides a
* default implementation that should work for most purposes.
*/
public static interface TestGroup {
/**
* Given an action that runs a given test case, generate and
* run all cases in this test group.
*/
public void runCases(Consumer<SelectionResolutionTestCase> runner);
/**
* The basic implementation of TestGroup. Produces one case
* for every possible combination of cases from each of its
* templates, by running them in order on an empty
* SelectionResolutionTestCase.Builder. This should be good
* enough for writing most tests.
*/
public static class Simple implements TestGroup {
private final Template[] templates;
private final SelectionResolutionTestCase.Builder initBuilder;
public Simple(final SelectionResolutionTestCase.Builder initBuilder,
final Template... templates) {
this.templates = templates;
this.initBuilder = initBuilder;
}
@Override
public void runCases(final Consumer<SelectionResolutionTestCase> runner) {
Consumer<SelectionResolutionTestCase.Builder> curr = (builder) -> {
runner.accept(builder.build());
};
for(int i = templates.length - 1; i >= 0; i--) {
final Consumer<SelectionResolutionTestCase.Builder> next = curr;
final Template template = templates[i];
curr = (builder) -> {
template.runCases(next, builder);
};
}
curr.accept(initBuilder);
}
}
}
private final List<String> errs = new LinkedList<String>();
private final Collection<TestGroup> testGroups;
private int testcount = 0;
/**
* Create a test from a set of test groups. Most actual tests can
* just define the test groups and pass them into this
* constructor, then call run.
*/
protected SelectionResolutionTest(final Collection<TestGroup> testGroups) {
this.testGroups = testGroups;
}
/**
* Run all the tests, report errors if they happen.
*/
protected void run() {
testGroups.stream().forEach(
(group) -> {
group.runCases((final SelectionResolutionTestCase testcase) -> {
testcount++;
final String err = testcase.run();
if (err != null) {
errs.add(err);
}
});
});
println("Ran " + testcount + " cases");
if(!errs.isEmpty()) {
println("Errors occurred in test:");
for(final String err : errs) {
println(err);
}
throw new RuntimeException("Errors occurred in test");
} else {
println("All test cases succeeded");
}
}
}
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