sqlancer/test/sqlancer/TestRandomly.java at main · sqlancer/sqlancer · GitHub

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package sqlancer;

import static org.junit.jupiter.api.Assertions.assertEquals;

import static org.junit.jupiter.api.Assertions.assertFalse;

import static org.junit.jupiter.api.Assertions.assertNotEquals;

import static org.junit.jupiter.api.Assertions.assertThrows;

import static org.junit.jupiter.api.Assertions.assertTrue;

import static org.junit.jupiter.api.Assertions.fail;

import java.util.ArrayList;

import java.util.Arrays;

import java.util.List;

import java.util.concurrent.ExecutorService;

import java.util.concurrent.Executors;

import java.util.concurrent.TimeUnit;

import org.junit.jupiter.api.Test;

public class TestRandomly {

private static final int NR_MIN_RUNS = 100000;

@Test // test that every option is picked

public void testFromOptions() {

Integer[] options = { 1, 2, 3 };

List<Integer> remainingOptions = new ArrayList<>(Arrays.asList(options));

while (!remainingOptions.isEmpty()) {

Integer pickedOption = Randomly.fromOptions(options);

remainingOptions.remove(pickedOption);

}

assertTrue(remainingOptions.isEmpty());

}

@Test

public void testSubset() {

boolean encounteredEmptySubset = false;

boolean encounteredOriginalSet = false;

boolean encounteredStrictSubsetNonEmpty = false;

Integer[] options = { 1, 2, 3 };

List<Integer> optionList = new ArrayList<>(Arrays.asList(options));

int i = 0;

do {

List<Integer> subset = Randomly.subset(optionList);

assertEquals(optionList.size(), 3); // check that the original set hasn't been modified

assertTrue(optionList.containsAll(subset));

if (subset.isEmpty()) {

encounteredEmptySubset = true;

} else if (subset.size() == optionList.size()) {

encounteredOriginalSet = true;

} else {

encounteredStrictSubsetNonEmpty = true;

}

} while (!encounteredEmptySubset || !encounteredOriginalSet || !encounteredStrictSubsetNonEmpty

|| i++ < NR_MIN_RUNS);

assertTrue(encounteredEmptySubset, "Empty subset was not encountered");

assertTrue(encounteredOriginalSet, "Original set was not encountered");

assertTrue(encounteredStrictSubsetNonEmpty, "Strict subset was not encountered");

}

@Test

public void testString() {

boolean encounteredInteger = false;

boolean encounteredAscii = false;

boolean encounteredNonAscii = false;

boolean encounteredSpace = false;

Randomly r = new Randomly();

int i = 0;

do {

String s = r.getString();

for (Character c : s.toCharArray()) {

if (Character.isAlphabetic(c)) {

encounteredAscii = true;

} else if (Character.isDigit(c)) {

encounteredInteger = true;

} else if (Character.isSpaceChar(c)) {

encounteredSpace = true;

} else {

encounteredNonAscii = true;

}

} while (!encounteredInteger || !encounteredAscii || !encounteredNonAscii || !encounteredSpace

|| i++ < NR_MIN_RUNS);

assertTrue(encounteredInteger, "Integer was not encountered");

assertTrue(encounteredAscii, "Ascii was not encountered");

assertTrue(encounteredNonAscii, "Non ascii was not encountered");

assertTrue(encounteredSpace, "Space was not encountered");

}

@Test // TODO: also generate and check for NaN

public void testDouble() {

Randomly r = new Randomly();

boolean encounteredZero = false;

boolean encounteredPositive = false;

boolean encounteredNegative = false;

boolean encounteredInfinity = false;

int i = 0;

do {

double doubleVal = r.getDouble();

if (doubleVal == 0) {

encounteredZero = true;

} else if (Double.isInfinite(doubleVal)) {

encounteredInfinity = true;

} else if (doubleVal > 0) {

encounteredPositive = true;

} else if (doubleVal < 0) {

encounteredNegative = true;

} else {

fail(String.valueOf(doubleVal));

}

} while (!encounteredZero || !encounteredPositive || !encounteredNegative || !encounteredInfinity

|| i++ < NR_MIN_RUNS);

assertTrue(encounteredZero, "Zero was not encountered");

assertTrue(encounteredPositive, "Positive was not encountered");

assertTrue(encounteredNegative, "Negative was not encountered");

assertTrue(encounteredInfinity, "Infinity was not encountered");

}

@Test

public void testFiniteDouble() {

Randomly r = new Randomly();

for (int i = 0; i < NR_MIN_RUNS; i++) {

assertFalse(Double.isInfinite(r.getFiniteDouble()));

}

@Test

public void testNonZeroInteger() {

Randomly r = new Randomly();

boolean encounteredPositive = false;

boolean encounteredNegative = false;

int i = 0;

do {

long nonZeroInt = r.getNonZeroInteger();

assertNotEquals(0, nonZeroInt);

if (nonZeroInt > 0) {

encounteredPositive = true;

} else {

encounteredNegative = true;

}

} while (!encounteredPositive || !encounteredNegative || i++ < NR_MIN_RUNS);

assertTrue(encounteredPositive, "Positive integer was not encountered");

assertTrue(encounteredNegative, "Negative integer was not encountered");

}

@Test

public void testPositiveInteger() {

Randomly r = new Randomly();

boolean encounteredZero = false;

boolean encounteredMaxValue = false;

int i = 0;

do {

long positiveInt = r.getPositiveInteger();

assertTrue(positiveInt >= 0);

if (positiveInt == 0) {

encounteredZero = true;

} else if (positiveInt == Long.MAX_VALUE) {

encounteredMaxValue = true;

}

} while (!encounteredZero || !encounteredMaxValue || i++ < NR_MIN_RUNS);

assertTrue(encounteredZero, "Zero was not encountered");

assertTrue(encounteredMaxValue, "Max value was not encountered");

}

@Test

public void testBytes() {

Randomly r = new Randomly();

boolean encounteredAllZeroes = false;

boolean encounteredMax = false;

boolean encounteredZeroLength = false;

int i = 0;

do {

byte[] bytes = r.getBytes();

if (bytes.length == 0) {

encounteredZeroLength = true;

} else if (bytes[0] == 0) {

encounteredAllZeroes = true;

} else if (bytes[0] == Byte.MAX_VALUE) {

encounteredMax = true;

}

} while (!encounteredAllZeroes || !encounteredMax || !encounteredZeroLength || i++ < NR_MIN_RUNS);

assertTrue(encounteredAllZeroes, "All zeroes were not encountered");

assertTrue(encounteredMax, "Max value was not encountered");

assertTrue(encounteredZeroLength, "Zero length was not encountered");

}

@Test

public void testNonCachedInteger() {

assertEquals(0, Randomly.getNotCachedInteger(0, 1));

assertEquals(0, Randomly.getNotCachedInteger(0, 0));

assertThrows(Exception.class, () -> Randomly.getNotCachedInteger(5, 0));

}

@Test

public void testInteger() {

Randomly r = new Randomly();

// TODO: we should throw an exception instead

assertEquals(0, r.getInteger(0, 0));

assertEquals(0, r.getInteger(0, 1));

}

@Test

public void testLong() {

Randomly r = new Randomly();

// TODO: we should throw an exception instead

assertEquals(0, r.getLong(0, 0));

assertEquals(0, r.getLong(0, 1));

}

@Test

public void testLong2() {

Randomly r = new Randomly();

for (int i = 0; i < NR_MIN_RUNS; i++) {

long val = r.getLong(-1, Long.MAX_VALUE);

assertTrue(val >= -1);

assertTrue(val < Long.MAX_VALUE);

}

@Test // check that when given a seed, each thread computes a consistent result

public void testSeed() {

int seed = 123;

Randomly r = new Randomly(seed);

List<String> values = getRandomValueList(r);

List<String> nonSeedList = getRandomValueList(new Randomly());

List<List<String>> otherThreadResults = new ArrayList<>();

assertNotEquals(values, nonSeedList);

ExecutorService executor = Executors.newFixedThreadPool(10);

for (int i = 0; i < 1000; i++) {

executor.execute(new Runnable() {

@Override

public void run() {

otherThreadResults.add(getRandomValueList(new Randomly(seed)));

}

});

}

executor.shutdown();

try {

executor.awaitTermination(Long.MAX_VALUE, TimeUnit.HOURS);

} catch (InterruptedException e) {

throw new AssertionError(e);

}

for (List<String> otherThreadResult : otherThreadResults) {

assertEquals(values, otherThreadResult);

}

private List<String> getRandomValueList(Randomly r) {

List<String> values = new ArrayList<>();

for (int i = 0; i < 1000; i++) {

values.add(String.valueOf(r.getDouble()));

values.add(String.valueOf(r.getInteger()));

values.add(String.valueOf(r.getString()));

values.add(String.valueOf(Randomly.getBoolean()));

}

return values;

}

@Test

public void testGetPercentage() {

for (int i = 0; i < NR_MIN_RUNS; i++) {

double percentage = Randomly.getPercentage();

assertTrue(percentage >= 0.0);

assertTrue(percentage <= 1.0);

}

@Test

public void testGetChar() {

Randomly r = new Randomly();

boolean encounteredAlphabetic = false;

boolean encounteredNumeric = false;

boolean encounteredSpecial = false;

int i = 0;

do {

String c = r.getChar();

assertEquals(1, c.length());

if (Character.isAlphabetic(c.charAt(0))) {

encounteredAlphabetic = true;

} else if (Character.isDigit(c.charAt(0))) {

encounteredNumeric = true;

} else {

encounteredSpecial = true;

}

} while (!encounteredAlphabetic || !encounteredNumeric || !encounteredSpecial || i++ < NR_MIN_RUNS);

assertTrue(encounteredAlphabetic, "Never encounter an alphabetic character.");

assertTrue(encounteredNumeric, "Never encounter a numeric character.");

assertTrue(encounteredSpecial, "Never encounter a special character.");

}

@Test

public void testGetAlphabeticChar() {

Randomly r = new Randomly();

for (int i = 0; i < NR_MIN_RUNS; i++) {

String c = r.getAlphabeticChar();

assertEquals(1, c.length());

assertTrue(Character.isAlphabetic(c.charAt(0)));

}

@Test

public void testGetBooleanWithSmallProbability() {

int trueCount = 0;

int totalRuns = NR_MIN_RUNS;

for (int i = 0; i < totalRuns; i++) {

if (Randomly.getBooleanWithSmallProbability()) {

trueCount++;

}

double trueRatio = (double) trueCount / totalRuns;

assertTrue(trueRatio > 0.005);

assertTrue(trueRatio < 0.015);

}

sqlancer/test/sqlancer/TestRandomly.java at main · sqlancer/sqlancer · GitHub

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