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/*
* Copyright (c) 2021, 2022, 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.
*/
/*
* @test
* @bug 8269146 8290709
* @summary Check compilation outcomes for various combinations of case label element.
* @library /tools/lib /tools/javac/lib
* @modules
* jdk.compiler/com.sun.tools.javac.api
* jdk.compiler/com.sun.tools.javac.file
* jdk.compiler/com.sun.tools.javac.main
* jdk.compiler/com.sun.tools.javac.util
* @build toolbox.ToolBox toolbox.JavacTask
* @build combo.ComboTestHelper
* @compile CaseStructureTest.java
* @run main CaseStructureTest
*/
import combo.ComboInstance;
import combo.ComboParameter;
import combo.ComboTask;
import combo.ComboTestHelper;
import java.util.Arrays;
import java.util.stream.Collectors;
import toolbox.ToolBox;
public class CaseStructureTest extends ComboInstance<CaseStructureTest> {
private static final String JAVA_VERSION = System.getProperty("java.specification.version");
protected ToolBox tb;
CaseStructureTest() {
super();
tb = new ToolBox();
}
public static void main(String... args) throws Exception {
new ComboTestHelper<CaseStructureTest>()
.withDimension("AS_CASE_LABEL_ELEMENTS", (x, asCaseLabelElements) -> x.asCaseLabelElements = asCaseLabelElements, true, false)
.withArrayDimension("CASE_LABELS", (x, caseLabels, idx) -> x.caseLabels[idx] = caseLabels, DIMENSIONS, CaseLabel.values())
.withFilter(t -> Arrays.stream(t.caseLabels).anyMatch(l -> l != CaseLabel.NONE))
.withFailMode(ComboTestHelper.FailMode.FAIL_FAST)
.run(CaseStructureTest::new);
}
private static final int DIMENSIONS = 4;
private boolean asCaseLabelElements;
private CaseLabel[] caseLabels = new CaseLabel[DIMENSIONS];
private static final String MAIN_TEMPLATE =
"""
public class Test {
public static void doTest(Integer in) {
switch (in) {
case -1: break;
#{CASES}
#{DEFAULT}
}
}
}
""";
@Override
protected void doWork() throws Throwable {
String labelSeparator = asCaseLabelElements ? ", " : ": case ";
String labels = Arrays.stream(caseLabels).filter(l -> l != CaseLabel.NONE).map(l -> l.code).collect(Collectors.joining(labelSeparator, "case ", ": break;"));
boolean hasDefault = Arrays.stream(caseLabels).anyMatch(l -> l == CaseLabel.DEFAULT || l == CaseLabel.TYPE_PATTERN);
ComboTask task = newCompilationTask()
.withSourceFromTemplate(MAIN_TEMPLATE.replace("#{CASES}", labels).replace("#{DEFAULT}", hasDefault ? "" : "default: break;"));
task.generate(result -> {
boolean shouldPass = true;
long patternCases = Arrays.stream(caseLabels).filter(l -> l == CaseLabel.TYPE_PATTERN).count();
long constantCases = Arrays.stream(caseLabels).filter(l -> l == CaseLabel.CONSTANT).count();
long nullCases = Arrays.stream(caseLabels).filter(l -> l == CaseLabel.NULL).count();
long defaultCases = Arrays.stream(caseLabels).filter(l -> l == CaseLabel.DEFAULT).count();
if (constantCases > 1) {
shouldPass &= false;
}
if (constantCases > 0) {
shouldPass &= patternCases == 0;
}
if (defaultCases > 0) {
shouldPass &= asCaseLabelElements && nullCases > 0;
}
if (defaultCases > 1) {
shouldPass &= false;
}
if (nullCases > 1) {
shouldPass &= false;
}
if (nullCases > 0) {
shouldPass &= patternCases == 0 && (constantCases == 0 || !asCaseLabelElements);
if (defaultCases > 0 && asCaseLabelElements) {
int nullIndex = Arrays.asList(caseLabels).indexOf(CaseLabel.NULL);
int defaultIndex = Arrays.asList(caseLabels).indexOf(CaseLabel.DEFAULT);
shouldPass &= nullIndex < defaultIndex;
}
}
if (patternCases > 1) {
shouldPass &= false;
}
if (patternCases > 0 && defaultCases > 0) {
shouldPass &= false;
}
if (!(shouldPass ^ result.hasErrors())) {
throw new AssertionError("Unexpected result: shouldPass=" + shouldPass + ", actual: " + !result.hasErrors() + ", info: " + result.compilationInfo());
}
});
}
public enum CaseLabel implements ComboParameter {
NONE(""),
TYPE_PATTERN("Integer i"),
CONSTANT("1"),
NULL("null"),
DEFAULT("default");
private final String code;
private CaseLabel(String code) {
this.code = code;
}
@Override
public String expand(String optParameter) {
throw new UnsupportedOperationException("Not supported.");
}
}
}
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