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/*
* Copyright (C) 2017.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 3 or
* version 2 as published by the Free Software Foundation.
*
* This program 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 for more details.
*/
package main;
import java.io.BufferedWriter;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.io.OutputStream;
import java.io.PrintStream;
import java.io.StringReader;
import java.io.UnsupportedEncodingException;
import java.nio.file.Files;
import java.nio.file.Paths;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Date;
import java.util.EnumSet;
import java.util.List;
import java.util.Objects;
import java.util.Random;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.Future;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;
import java.util.function.BiFunction;
import javax.xml.bind.DatatypeConverter;
import uk.me.parabola.imgfmt.app.Coord;
import uk.me.parabola.mkgmap.main.StyleTester;
import uk.me.parabola.mkgmap.osmstyle.ExpressionArranger;
import uk.me.parabola.mkgmap.osmstyle.eval.AndOp;
import uk.me.parabola.mkgmap.osmstyle.eval.BinaryOp;
import uk.me.parabola.mkgmap.osmstyle.eval.EqualsOp;
import uk.me.parabola.mkgmap.osmstyle.eval.ExistsOp;
import uk.me.parabola.mkgmap.osmstyle.eval.ExpressionReader;
import uk.me.parabola.mkgmap.osmstyle.eval.GTEOp;
import uk.me.parabola.mkgmap.osmstyle.eval.LTOp;
import uk.me.parabola.mkgmap.osmstyle.eval.NodeType;
import uk.me.parabola.mkgmap.osmstyle.eval.NotEqualOp;
import uk.me.parabola.mkgmap.osmstyle.eval.NotExistsOp;
import uk.me.parabola.mkgmap.osmstyle.eval.NotOp;
import uk.me.parabola.mkgmap.osmstyle.eval.Op;
import uk.me.parabola.mkgmap.osmstyle.eval.OrOp;
import uk.me.parabola.mkgmap.osmstyle.eval.RegexOp;
import uk.me.parabola.mkgmap.osmstyle.eval.ValueOp;
import uk.me.parabola.mkgmap.osmstyle.function.FunctionFactory;
import uk.me.parabola.mkgmap.osmstyle.function.GetTagFunction;
import uk.me.parabola.mkgmap.reader.osm.FeatureKind;
import uk.me.parabola.mkgmap.reader.osm.Way;
import uk.me.parabola.mkgmap.scan.SyntaxException;
import uk.me.parabola.mkgmap.scan.TokenScanner;
import static java.nio.file.StandardCopyOption.REPLACE_EXISTING;
import static uk.me.parabola.mkgmap.osmstyle.eval.NodeType.*;
public class RulesTest
{
private static final Random rand =
new Random();
private static final EnumSet<NodeType
> INVALID_TOP =
EnumSet.
of(NOT, NOT_EXISTS, NOT_EQUALS
);
private static final EnumSet<NodeType
> USEFUL_NODES
;
private static final String TEST_FILE_NAME =
"tmp.test";
private static final int TEST_TIMEOUT =
500; // In Milli seconds
static {
USEFUL_NODES =
EnumSet.
allOf(NodeType.
class);
USEFUL_NODES.
removeAll(INVALID_TOP
);
USEFUL_NODES.
removeAll(EnumSet.
of(OR, AND, VALUE
));
}
private static boolean onlyErrors
;
private static int maxErrors =
Integer.
MAX_VALUE;
private static int maxRules =
1000;
private static long seed =
8799543;
private static boolean debug
;
private static boolean saveErrors
;
private static boolean stopOnFail
;
private final String[] values =
{
"1",
"2"
};
private final String[] names =
{
"a",
"b"
};
private int syntaxErrors
;
private final ExecutorService executor =
Executors.
newSingleThreadExecutor();
private static ExpressionArranger arranger
;
private final List<Way
> testWays =
new ArrayList<>();
private static void processOptions
(String...
args) {
for (int i =
0, argsLength = args.
length; i
< argsLength
; i++
) {
String s = args
[i
];
if (s.
startsWith("--err")) {
onlyErrors =
true;
} else if (s.
startsWith("--save")) {
saveErrors =
true;
} else if (s.
startsWith("--max-e")) {
maxErrors =
Integer.
parseInt(args
[++i
]);
} else if (s.
startsWith("--max-r")) {
maxRules =
Integer.
parseInt(args
[++i
]);
} else if (s.
startsWith("--arr")) {
arranger =
new ExpressionArranger
();
} else if (s.
startsWith("--stop")) {
stopOnFail =
true;
} else if (s.
startsWith("--use-len")) {
System.
out.
println("The --use-length option is no longer needed");
} else if (s.
startsWith("--seed")) {
seed =
Long.
parseLong(args
[++i
]);
} else if (s.
startsWith("--rand")) {
seed =
System.
currentTimeMillis();
} else if (s.
startsWith("--debug")) {
debug =
true;
} else {
System.
out.
println("Usage:\n" +
"--arrange-test use the ExpressionArranger instead of style tester\n" +
"--max-errors stop after this many errors\n" +
"--max-rules run this number of random rules\n" +
"--errors only show errors\n" +
"--stop-on-fail stop on test failures\n" +
"--seed N set the random number seed to reproduce a previous run\n" +
"--rand set the random seed to the current time, so a different set of rules" +
" are generated.\n" +
"--save-errors save errors as style tester files\n" +
"\n" +
"Any error displayed is a bug in mkgmap.\n")
;
System.
exit(2);
}
}
}
public static void main
(String...
args) {
processOptions
(args
);
rand.
setSeed(seed
);
RulesTest srt =
new RulesTest
();
srt.
run();
}
private void run
() {
initTestWays
();
int errors =
0;
int count
;
for (count =
0; count
< maxRules
&& errors
< maxErrors
; ) {
Op expr = generateExpr
(true);
boolean invalid = checkEmpty
(expr
);
if (!invalid
) {
count++
;
String rule = expr +
String.
format(" {name 'n%d'} [0x2]", count
);
boolean ok = testRule
(rule, count
);
if (!ok
)
errors++
;
}
}
executor.
shutdownNow();
System.
out.
printf("Tests: %s, errors=%d (%d non-syntax failures), passed=%d. ",
count, errors, errors-syntaxErrors, count-errors
);
System.
out.
printf("Seed was %d\n", seed
);
}
private void initTestWays
() {
for (int a =
0; a
< 3; a++
) {
for (int b =
0; b
< 3; b++
) {
Way w = makeWay
();
if (a
> 0)
w.
addTag("a",
String.
valueOf(a
));
if (b
> 0)
w.
addTag("b",
String.
valueOf(b
));
testWays.
add(w
);
}
}
}
/**
* Test the rule by writing a style-tester file and letting it run it.
*/
private boolean testRule
(String rule,
int id
) {
if (arranger
!=
null) {
return testCradle
(rule, id,
this::runArrangeTest
);
} else {
return testCradle
(rule, id,
this::runStyleTester
);
}
}
private boolean runStyleTester
(String rule,
int id
) {
OutputStream buf =
new ByteArrayOutputStream();
StyleTester.
setOut(new PrintStream(buf
));
try (BufferedWriter fw =
new BufferedWriter(new FileWriter(TEST_FILE_NAME
))) {
fw.
write(String.
format("#\n# Rule: %s\n# Id: %d\n# Seed: %d\n# Date: %s\n#\n",
rule, id, seed,
SimpleDateFormat.
getDateInstance().
format(new Date())));
writeWayDefs
(fw
);
fw.
write("<<<lines>>>\n");
fw.
write(rule
);
fw.
newLine();
} catch (IOException e
) {
e.
printStackTrace();
System.
exit(2);
}
StyleTester.
runSimpleTest(TEST_FILE_NAME
);
String output = buf.
toString();
if (output.
contains("ERROR")) {
System.
out.
println("ERROR: FAILED test: " + rule
);
System.
out.
println(output
);
// On error save the test file.
saveFile
(TEST_FILE_NAME, rule, id
);
checkStopOnFail
();
return false;
} else {
if (!onlyErrors
)
System.
out.
println("OK: " + rule
);
// remove since ok
new File(TEST_FILE_NAME
).
delete();
return true;
}
}
private boolean runArrangeTest
(String rule,
int id
) {
TokenScanner scanner =
new TokenScanner
("test.file",
new StringReader(rule
));
ExpressionReader er =
new ExpressionReader
(scanner, FeatureKind.
POLYLINE);
Op op = er.
readConditions();
boolean[] orig = evalWays
(op
);
Op result = arranger.
arrange(op
);
boolean[] after = evalWays
(result
);
boolean ok =
Arrays.
equals(after, orig
);
if (ok
) {
if (!onlyErrors
)
System.
out.
println("OK: " + rule
);
} else {
System.
out.
println("ERROR: FAILED test: " + rule
);
System.
out.
println(" new expr: " + op
);
for (int i =
0; i
< orig.
length; i++
) {
if (orig
[i
] != after
[i
]) {
System.
out.
println(" way " + testWays.
get(i
) +
", orig=" + orig
[i
] +
", arranged=" + after
[i
]);
}
}
checkStopOnFail
();
}
return ok
;
}
private boolean[] evalWays
(Op op
) {
boolean[] result =
new boolean[testWays.
size()];
int count =
0;
for (Way w : testWays
) {
result
[count++
] = op.
eval(w
);
}
return result
;
}
/**
* Call a test method in a timeout protected wrapper.
*
* @param rule The rule to be tested.
* @param id The id of the rule in this run.
* @param call The test method to call.
* @return True if the test passed, false if it failed, or there was an exception.
*/
private boolean testCradle
(String rule,
int id, BiFunction
<String,
Integer,
Boolean> call
) {
Future<Boolean> future = executor.
submit(() -
> call.
apply(rule, id
));
try {
Boolean result = future.
get(TEST_TIMEOUT,
TimeUnit.
MILLISECONDS);
if (result
!=
null)
return result
;
} catch (InterruptedException |
TimeoutException e
) {
future.
cancel(true);
System.
out.
println("ERROR: Timeout - took too long: " + rule
);
System.
out.
println(" Message: " + e
);
// On error save the test file.
saveFile
(TEST_FILE_NAME, rule, id
);
checkStopOnFail
();
} catch (ExecutionException e
) {
future.
cancel(true);
Throwable ne = e.
getCause();
if (ne
instanceof SyntaxException
) {
System.
out.
println("ERROR: Syntax: " + rule
);
syntaxErrors++
;
} else {
System.
out.
println("ERROR: Failed with exception: " + rule
);
System.
out.
println(" exception: " + ne
);
}
checkStopOnFail
();
System.
out.
println(" Message: " + ne.
getMessage());
// On error save the test file.
saveFile
(TEST_FILE_NAME, rule, id
);
}
return false;
}
private void checkStopOnFail
() {
if (stopOnFail
) {
System.
out.
println("Stopping after first failure");
executor.
shutdownNow();
System.
exit(1);
}
}
private void saveFile
(String fromName,
String rule,
int id
) {
if (!saveErrors || fromName ==
null)
return;
String fileName
;
try {
MessageDigest md5 =
MessageDigest.
getInstance("md5");
byte[] digest = md5.
digest(rule.
getBytes("utf-8"));
String s = DatatypeConverter.
printHexBinary(digest
).
substring(0,
8);
fileName =
String.
format("t-%s.test", s
);
} catch (NoSuchAlgorithmException |
UnsupportedEncodingException e
) {
fileName =
String.
format("t-%06d.test", id
);
}
try {
Files.
move(Paths.
get(fromName
), Paths.
get(fileName
), REPLACE_EXISTING
);
} catch (IOException e
) {
e.
printStackTrace();
}
}
/**
* Create ways for all combinations of the used variables and values.
* @param fw Write to here
*/
private void writeWayDefs
(BufferedWriter fw
) {
int count =
1;
for (int a =
0; a
< 3; a++
) {
for (int b =
0; b
< 3; b++
) {
try {
fw.
write(String.
format("WAY %d\n", count
));
if (a
> 0)
fw.
write(String.
format("a=%d\n", a
));
if (b
> 0)
fw.
write(String.
format("b=%d\n", b
));
fw.
newLine();
} catch (IOException e
) {
e.
printStackTrace();
}
count++
;
}
}
}
/**
* Check if this rule would match an empty way.
*
* Such rules are not allowed.
*
* The problem case is length(). The length of the test way is 3.3 and we always make
* sure that length is only used in expressions with GTE and values of 1 or 2 so they
* are always true. However if there is a NOT in front if it it will then be false and
* so the simple test of of an empty way returning true could miss this case.
*
* So we also check with a way of length zero.
*
* Then there is still the problem that we do not detect an expression such as (length()>=2 & !(length()>=2))
*
* So reject any rule that has length() beneath a not.
*/
private static boolean checkEmpty
(Op expr
) {
Way way = makeWay
();
boolean invalid = expr.
eval(way
);
Way way1 =
new Way
(2);
way1.
addPoint(new Coord
(1,
1));
if (expr.
eval(way1
))
invalid =
true;
// So if there is a length() anywhere beneath a NOT then throw this rule out.
if (checkNotLength
(expr, expr.
isType(NOT
)))
invalid =
true;
return invalid
;
}
public static boolean checkNotLength
(Op expr,
boolean hasNot
) {
if (expr ==
null)
return false;
Op f = expr.
getFirst();
if (hasNot
&& f
!=
null && f.
isType(FUNCTION
) && Objects.
equals(f.
toString(),
"length()"))
return true;
boolean invalid =
false;
NodeType t = expr.
getType();
if (expr
instanceof BinaryOp
) {
if (checkNotLength
(expr.
getFirst(), hasNot
))
invalid =
true;
if (checkNotLength
(expr.
getSecond(), hasNot
))
invalid =
true;
} else if (t == NOT
) {
if (checkNotLength
(expr.
getFirst(),
true))
invalid =
true;
}
return invalid
;
}
private static Way makeWay
() {
Way way =
new Way
(1);
way.
addPoint(new Coord
(1,
1));
way.
addPoint(new Coord
(2,
2));
return way
;
}
/**
* Generate a random expression.
*/
private Op generateExpr
() {
return generateExpr
(false);
}
/**
* Generate a random expression.
*
* Picks a random operation from a hopefully representative list of possibilities.
* It is called recursively to fill in AND and OR subtrees.
*
* @param interesting Only return OR / AND for use as the starting term. Otherwise
* you get a lot of uninteresting a=2 type expressions.
*/
private Op generateExpr
(boolean interesting
) {
int t = rand.
nextInt(interesting
? 3:
10);
switch (t
) {
case 0:
return fillOp
(new AndOp
());
case 1:
return fillOp
(new OrOp
());
case 2:
return fillOp
(new NotOp
());
case 3:
return fillNameValue
(new LTOp
());
case 4:
return fillNameValue
(new GTEOp
());
case 5:
return fillNameValue
(new RegexOp
());
case 6:
return fillNameValue
(new NotEqualOp
());
case 7:
return new ExistsOp
().
setFirst(genNameOp
(EXISTS
));
case 8:
return new NotExistsOp
().
setFirst(genNameOp
(NOT_EXISTS
));
default:
return fillNameValue
(new EqualsOp
());
}
}
/**
* Fill the slots on a container operation eg AND, OR
*/
private Op fillOp
(Op op
) {
op.
setFirst(generateExpr
());
if (op
instanceof BinaryOp
)
op.
setSecond(generateExpr
());
return op
;
}
/**
* Fill with an name and a value.
*
* There are a limited number of names and values available.
*/
private Op fillNameValue
(BinaryOp op
) {
op.
setFirst(genNameOp
(op.
getType()));
op.
setSecond(valueOp
());
return op
;
}
private Op genNameOp
(NodeType type
) {
if (type == GTE
&& rand.
nextInt(4) ==
0) {
return FunctionFactory.
createFunction("length");
}
String name = names
[rand.
nextInt(names.
length)];
return new GetTagFunction
(name
);
}
private Op valueOp
() {
return new ValueOp
(values
[rand.
nextInt(values.
length)]);
}
}