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test/tools/javac/StringsInSwitch/OneCaseSwitches.java@959103a6100f (annotated)

test/tools/javac/StringsInSwitch/OneCaseSwitches.java

Wed, 27 Apr 2016 01:34:52 +0800

author

aoqi

date

Wed, 27 Apr 2016 01:34:52 +0800

changeset 0

959103a6100f

child 2525

2eb010b6cb22

permissions

-rw-r--r--

Initial load
http://hg.openjdk.java.net/jdk8u/jdk8u/langtools/
changeset: 2573:53ca196be1ae
tag: jdk8u25-b17

aoqi@0	1	/*
aoqi@0	2	* Copyright (c) 2009, Oracle and/or its affiliates. All rights reserved.
aoqi@0	3	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
aoqi@0	4	*
aoqi@0	5	* This code is free software; you can redistribute it and/or modify it
aoqi@0	6	* under the terms of the GNU General Public License version 2 only, as
aoqi@0	7	* published by the Free Software Foundation.
aoqi@0	8	*
aoqi@0	9	* This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@0	10	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@0	11	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
aoqi@0	12	* version 2 for more details (a copy is included in the LICENSE file that
aoqi@0	13	* accompanied this code).
aoqi@0	14	*
aoqi@0	15	* You should have received a copy of the GNU General Public License version
aoqi@0	16	* 2 along with this work; if not, write to the Free Software Foundation,
aoqi@0	17	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@0	18	*
aoqi@0	19	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@0	20	* or visit www.oracle.com if you need additional information or have any
aoqi@0	21	* questions.
aoqi@0	22	*/
aoqi@0	23
aoqi@0	24	/*
aoqi@0	25	* @test
aoqi@0	26	* @bug 6827009
aoqi@0	27	* @summary Positive tests for strings in switch with few alternatives.
aoqi@0	28	* @compile/fail -source 6 OneCaseSwitches.java
aoqi@0	29	* @compile OneCaseSwitches.java
aoqi@0	30	* @run main OneCaseSwitches
aoqi@0	31	* @author Joseph D. Darcy
aoqi@0	32	*/
aoqi@0	33
aoqi@0	34	import java.lang.reflect.*;
aoqi@0	35	import java.lang.annotation.*;
aoqi@0	36	import java.util.*;
aoqi@0	37	import static java.lang.annotation.RetentionPolicy.*;
aoqi@0	38
aoqi@0	39	public class OneCaseSwitches {
aoqi@0	40	@Retention(RUNTIME)
aoqi@0	41	@interface TestMeForNull {}
aoqi@0	42
aoqi@0	43	@TestMeForNull
aoqi@0	44	public static int zeroCasesNoDefault(String s, Set<String> stringSet, boolean expected) {
aoqi@0	45	int failures = 0;
aoqi@0	46	switch(s) {
aoqi@0	47	}
aoqi@0	48	return failures;
aoqi@0	49	}
aoqi@0	50
aoqi@0	51	@TestMeForNull
aoqi@0	52	public static int zeroCasesWithDefault(String s, Set<String> stringSet, boolean expected) {
aoqi@0	53	int failures = 2;
aoqi@0	54	boolean addResult;
aoqi@0	55
aoqi@0	56	switch(s) {
aoqi@0	57	default:
aoqi@0	58	failures = 0;
aoqi@0	59	addResult = stringSet.add(s);
aoqi@0	60	if (addResult != expected) {
aoqi@0	61	failures++;
aoqi@0	62	System.err.println("zeroCaseWithDefault: Expectedly got add result of " + addResult +
aoqi@0	63	" on string " + s);
aoqi@0	64	}
aoqi@0	65	}
aoqi@0	66
aoqi@0	67	return failures;
aoqi@0	68	}
aoqi@0	69
aoqi@0	70	@TestMeForNull
aoqi@0	71	public static int zeroCasesWithDefaultBreak(String s, Set<String> stringSet, boolean expected) {
aoqi@0	72	int failures = 2;
aoqi@0	73	boolean addResult;
aoqi@0	74
aoqi@0	75	switch(s) {
aoqi@0	76	default:
aoqi@0	77	failures = zeroCasesWithDefault(s, stringSet, expected);
aoqi@0	78	break;
aoqi@0	79	}
aoqi@0	80
aoqi@0	81	return failures;
aoqi@0	82	}
aoqi@0	83
aoqi@0	84	@TestMeForNull
aoqi@0	85	public static int oneCaseNoDefault(String s, Set<String> stringSet, boolean expected) {
aoqi@0	86	int failures = 2;
aoqi@0	87	boolean addResult;
aoqi@0	88
aoqi@0	89	switch(s) {
aoqi@0	90	case "foo":
aoqi@0	91	failures = 0;
aoqi@0	92	addResult = stringSet.add(s);
aoqi@0	93	if (addResult != expected) {
aoqi@0	94	failures++;
aoqi@0	95	System.err.println("oneCaseNoDefault: Unexpectedly got add result of " + addResult +
aoqi@0	96	" on string " + s);
aoqi@0	97	}
aoqi@0	98	}
aoqi@0	99
aoqi@0	100	return failures;
aoqi@0	101	}
aoqi@0	102
aoqi@0	103	@TestMeForNull
aoqi@0	104	public static int oneCaseNoDefaultBreak(String s, Set<String> stringSet, boolean expected) {
aoqi@0	105	int failures = 2;
aoqi@0	106	boolean addResult;
aoqi@0	107
aoqi@0	108	switch(s) {
aoqi@0	109	case "foo":
aoqi@0	110	failures = oneCaseNoDefaultBreak(s, stringSet, expected);
aoqi@0	111	break;
aoqi@0	112	}
aoqi@0	113
aoqi@0	114	return failures;
aoqi@0	115	}
aoqi@0	116
aoqi@0	117	@TestMeForNull
aoqi@0	118	public static int oneCaseWithDefault(String s, Set<String> stringSet, boolean expected) {
aoqi@0	119	int failures = 2;
aoqi@0	120	boolean addResult;;
aoqi@0	121
aoqi@0	122	switch(s) {
aoqi@0	123	case "foo":
aoqi@0	124	failures = 0;
aoqi@0	125	addResult = stringSet.add(s);
aoqi@0	126	if (addResult != expected) {
aoqi@0	127	failures++;
aoqi@0	128	System.err.println("oneCaseNoDefault: Expectedly got add result of " + addResult +
aoqi@0	129	" on string " + s);
aoqi@0	130	}
aoqi@0	131	break;
aoqi@0	132	default:
aoqi@0	133	break;
aoqi@0	134	}
aoqi@0	135
aoqi@0	136	return failures;
aoqi@0	137	}
aoqi@0	138
aoqi@0	139	@TestMeForNull
aoqi@0	140	public static int oneCaseBreakOnly(String s, Set<String> stringSet, boolean expected) {
aoqi@0	141	int failures = 1;
aoqi@0	142	switch(s) {
aoqi@0	143	case "foo":
aoqi@0	144	break;
aoqi@0	145	}
aoqi@0	146	failures = 0;
aoqi@0	147	return failures;
aoqi@0	148	}
aoqi@0	149
aoqi@0	150	@TestMeForNull
aoqi@0	151	public static int oneCaseDefaultBreakOnly(String s, Set<String> stringSet, boolean expected) {
aoqi@0	152	int failures = 1;
aoqi@0	153	switch(s) {
aoqi@0	154	default:
aoqi@0	155	break;
aoqi@0	156	}
aoqi@0	157	failures = 0;
aoqi@0	158	return failures;
aoqi@0	159	}
aoqi@0	160
aoqi@0	161
aoqi@0	162	static int testNullBehavior() {
aoqi@0	163	int failures = 0;
aoqi@0	164	int count = 0;
aoqi@0	165
aoqi@0	166	Method[] methods = OneCaseSwitches.class.getDeclaredMethods();
aoqi@0	167
aoqi@0	168	try {
aoqi@0	169	for(Method method : methods) {
aoqi@0	170	count++;
aoqi@0	171	try {
aoqi@0	172	if (method.isAnnotationPresent(TestMeForNull.class)) {
aoqi@0	173	System.out.println("Testing method " + method);
aoqi@0	174	method.invoke(null, (String)null, emptyStringSet, false);
aoqi@0	175	failures++;
aoqi@0	176	System.err.println("Didn't get NPE as expected from " + method);
aoqi@0	177	}
aoqi@0	178	} catch (InvocationTargetException ite) { // Expected
aoqi@0	179	Throwable targetException = ite.getTargetException();
aoqi@0	180	if (! (targetException instanceof NullPointerException)) {
aoqi@0	181	failures++; // Wrong exception thrown
aoqi@0	182	System.err.println("Didn't get expected target exception NPE, got " +
aoqi@0	183	ite.getClass().getName());
aoqi@0	184	}
aoqi@0	185	}
aoqi@0	186	}
aoqi@0	187	} catch (Exception e) {
aoqi@0	188	throw new RuntimeException(e);
aoqi@0	189	}
aoqi@0	190
aoqi@0	191	if (count == 0) {
aoqi@0	192	failures++;
aoqi@0	193	System.err.println("Did not find any annotated methods.");
aoqi@0	194	}
aoqi@0	195	return failures;
aoqi@0	196	}
aoqi@0	197
aoqi@0	198	static int testZeroCases() {
aoqi@0	199	int failures = 0;
aoqi@0	200	Set<String> noDefaultSet = new HashSet<String>();
aoqi@0	201	Set<String> defaultSet = new HashSet<String>();
aoqi@0	202
aoqi@0	203	zeroCasesNoDefault(FOO, noDefaultSet, false);
aoqi@0	204	for(String word : words) {
aoqi@0	205	zeroCasesNoDefault(word, noDefaultSet, false);
aoqi@0	206	}
aoqi@0	207
aoqi@0	208	if (!noDefaultSet.isEmpty()) {
aoqi@0	209	failures++;
aoqi@0	210	System.err.println("Non-empty set after zeroCasesNoDefault");
aoqi@0	211	}
aoqi@0	212
aoqi@0	213	for(String word : words) {
aoqi@0	214	zeroCasesWithDefault(word, defaultSet, true);
aoqi@0	215	}
aoqi@0	216	if (defaultSet.size() != words.length) {
aoqi@0	217	failures++;
aoqi@0	218	System.err.println("Missing strings after zeroCasesWithDefault");
aoqi@0	219	}
aoqi@0	220
aoqi@0	221	return failures;
aoqi@0	222	}
aoqi@0	223
aoqi@0	224	static int testOneCaseNoDefault() {
aoqi@0	225	int failures = 0;
aoqi@0	226	Set<String> s = new HashSet<String>();
aoqi@0	227	s.add("foo");
aoqi@0	228	Set<String> fooSet = Collections.unmodifiableSet(s);
aoqi@0	229	Set<String> testSet = new HashSet<String>();
aoqi@0	230
aoqi@0	231	oneCaseNoDefault(FOO, testSet, true);
aoqi@0	232	if (!testSet.equals(fooSet)) {
aoqi@0	233	failures++;
aoqi@0	234	System.err.println("Unexpected result from oneCaseNoDefault: didn't get {\"Foo\"}");
aoqi@0	235	}
aoqi@0	236
aoqi@0	237	for(String word : words) {
aoqi@0	238	oneCaseNoDefault(word, testSet, false);
aoqi@0	239	}
aoqi@0	240	if (!testSet.equals(fooSet)) {
aoqi@0	241	failures++;
aoqi@0	242	System.err.println("Unexpected result from oneCaseNoDefault: didn't get {\"Foo\"}");
aoqi@0	243	}
aoqi@0	244
aoqi@0	245	return failures;
aoqi@0	246	}
aoqi@0	247
aoqi@0	248	static int testBreakOnly() {
aoqi@0	249	int failures = 0;
aoqi@0	250
aoqi@0	251	for(String word : words) {
aoqi@0	252	failures += oneCaseBreakOnly(word, emptyStringSet, true);
aoqi@0	253	failures += oneCaseDefaultBreakOnly(word, emptyStringSet, true);
aoqi@0	254	}
aoqi@0	255
aoqi@0	256	return failures;
aoqi@0	257	}
aoqi@0	258
aoqi@0	259	static int testExpressionEval() {
aoqi@0	260	String s = "a";
aoqi@0	261	int errors = 2;
aoqi@0	262
aoqi@0	263	System.out.println("Testing expression evaluation.");
aoqi@0	264
aoqi@0	265	switch (s + s) {
aoqi@0	266	case "aa":
aoqi@0	267	errors = 0;
aoqi@0	268	break;
aoqi@0	269
aoqi@0	270	case "aaaa":
aoqi@0	271	errors = 1;
aoqi@0	272	System.err.println("Suspected bad expression evaluation.");
aoqi@0	273	break;
aoqi@0	274
aoqi@0	275	default:
aoqi@0	276	throw new RuntimeException("Should not reach here.");
aoqi@0	277	}
aoqi@0	278	return errors;
aoqi@0	279	}
aoqi@0	280
aoqi@0	281	static final String FOO = "foo";
aoqi@0	282
aoqi@0	283	static final String[] words = {"baz",
aoqi@0	284	"quux",
aoqi@0	285	"wombat",
aoqi@0	286	"\u0ccc\u0012"}; // hash collision with "foo"
aoqi@0	287
aoqi@0	288	final static Set<String> emptyStringSet = Collections.emptySet();
aoqi@0	289
aoqi@0	290	public static void main(String... args) {
aoqi@0	291	int failures = 0;
aoqi@0	292
aoqi@0	293	failures += testNullBehavior();
aoqi@0	294	failures += testZeroCases();
aoqi@0	295	failures += testOneCaseNoDefault();
aoqi@0	296	failures += testBreakOnly();
aoqi@0	297	failures += testExpressionEval();
aoqi@0	298
aoqi@0	299	if (failures > 0) {
aoqi@0	300	throw new RuntimeException();
aoqi@0	301	}
aoqi@0	302	}
aoqi@0	303	}