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Generates unit tests from code or annotated methods
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/*
* created by: Tom
* created on: 31.03.2017
*
* Copyright: (c) Thomas Schneider 2017, all rights reserved
*/
package de.tsl2.nano.autotest;
import static de.tsl2.nano.autotest.creator.AutoTest.PREFIX_FUNCTIONTEST;
import static java.lang.annotation.ElementType.METHOD;
import static java.lang.annotation.ElementType.PARAMETER;
import static java.lang.annotation.ElementType.TYPE;
import static java.lang.annotation.RetentionPolicy.RUNTIME;
import java.io.Closeable;
import java.io.File;
import java.io.FileWriter;
import java.io.PrintStream;
import java.io.PrintWriter;
import java.io.Reader;
import java.io.StringReader;
import java.io.StringWriter;
import java.io.Writer;
import java.lang.annotation.Retention;
import java.lang.annotation.Target;
import java.lang.reflect.Array;
import java.lang.reflect.Constructor;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.math.BigDecimal;
import java.net.InetAddress;
import java.net.InetSocketAddress;
import java.net.URI;
import java.net.URL;
import java.nio.file.Path;
import java.text.Format;
import java.util.Arrays;
import java.util.Collection;
import java.util.Date;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Properties;
import java.util.function.BiFunction;
import de.tsl2.nano.autotest.creator.AFunctionCaller;
import de.tsl2.nano.autotest.creator.AutoTest;
import de.tsl2.nano.core.ManagedException;
import de.tsl2.nano.core.cls.BeanAttribute;
import de.tsl2.nano.core.cls.BeanClass;
import de.tsl2.nano.core.cls.IAttribute;
import de.tsl2.nano.core.cls.PrimitiveUtil;
import de.tsl2.nano.core.cls.PrivateAccessor;
import de.tsl2.nano.core.util.AdapterProxy;
import de.tsl2.nano.core.util.ByteUtil;
import de.tsl2.nano.core.util.DateUtil;
import de.tsl2.nano.core.util.DefaultFormat;
import de.tsl2.nano.core.util.DependencyInjector;
import de.tsl2.nano.core.util.FieldUtil;
import de.tsl2.nano.core.util.FileUtil;
import de.tsl2.nano.core.util.ListSet;
import de.tsl2.nano.core.util.MapUtil;
import de.tsl2.nano.core.util.NumberUtil;
import de.tsl2.nano.core.util.ObjectUtil;
import de.tsl2.nano.core.util.StringUtil;
import de.tsl2.nano.core.util.Util;
/**
* For test purposes only!
*
* Simple logic to fill all types of fields of a given object with random
* values. Together with a Bean class that provides all types of fields and
* their getters and setters you are able to write generic framework unit tests.
*
* NOTE: Additionally you should test your logic on testsets (e.g. maps of
* fields with boundary values) describing the boundary conditions. To be more
* generic, you may use lots of runs on random values instead. This may be done
* with {@link #provideRandomizedObjects(int, Class...)}
*
* Before creating any random number + value, the ValueRandomizer tries to read a file with
* name e.g.: String -> string.set
* If this file exists a random value of that will be used. The values can be separated by whitespaces or ';'.
* If this file exists and has only one line with content like 'min<->max' then a minimum and maximum value
* will be set for that type.
*
* @author Thomas Schneider
*/
@SuppressWarnings({"unchecked", "rawtypes"})
public class ValueRandomizer {
private static final ValueSets valueSets = new ValueSets();
private static DependencyInjector di = new DependencyInjector();
private ValueRandomizer() {
}
public static Object fillRandom(Object obj) {
return fillRandom(obj, false, 0);
}
public static T fillRandom(T obj, boolean zeroNumber, final int depth) {
if (!checkMaxDepth(depth + 1)) {
return obj;
}
PrivateAccessor acc = new PrivateAccessor<>(obj);
Field[] fields = acc.findMembers(PrivateAccessor::notStaticAndNotFinal);
Arrays.stream(fields)
.filter(f -> acc.member(f.getName()) == null)
.forEach(f -> Util.trY(
() -> acc.set(f.getName(), createRandomValue(FieldUtil.getExplicitType(f), zeroNumber, depth)),
false));
return obj;
}
public static Object createRandomProxy(Class interfaze, boolean zeroNumber) {
return createRandomProxy(interfaze, zeroNumber, 0);
}
public static V createRandomProxy(Class interfaze, boolean zeroNumber, final int depth) {
if (!checkMaxDepth(depth + 1)) {
return null;
}
Map types = AdapterProxy.getValueTypes(interfaze);
Map values = new HashMap<>();
types.forEach(
(n, t) -> values.put(n, t.isAssignableFrom(interfaze) || interfaze.isAssignableFrom(t) ? null
: createRandomValue(t, zeroNumber, depth)));
return AdapterProxy.create(interfaze, values);
}
protected static V createRandomValue(Class typeOf) {
return createRandomValue(typeOf, false);
}
protected static V createRandomValue(Class typeOf, boolean zeroNumber) {
return createRandomValue(typeOf, zeroNumber, 0);
}
protected static V createRandomValue(Class typeOf, boolean zeroNumber, int depth) {
Class genericType = (Class) ObjectUtil.getGenericType(typeOf);
typeOf = !Iterable.class.isAssignableFrom(typeOf) &&
!Iterable.class.isAssignableFrom(typeOf) &&
genericType != null && !genericType.equals(Object.class)
? genericType
: typeOf;
if (!checkMaxDepth(++depth)) {
System.out.print(">");
return null;
}
Object n;
V value = null;
try {
if (!Util.isEmpty(AFunctionCaller.def(AutoTest.VALUESET_GROUP, ValueSets.DEFAULT))
&& valueSets.hasValueSet(typeOf)) {
n = valueSets.fromValueSet(typeOf);
} else {
n = zeroNumber && (typeOf.isPrimitive() || NumberUtil.isNumber(typeOf))
&& (!PrimitiveUtil.isAssignableFrom(char.class, typeOf)
|| AFunctionCaller.def(AutoTest.ALLOW_SINGLE_CHAR_ZERO, false))
&& (!PrimitiveUtil.isAssignableFrom(byte.class, typeOf)
|| AFunctionCaller.def(AutoTest.ALLOW_SINGLE_BYTE_ZERO, false))
? 0d
: createRandomNumber(typeOf);
}
// avoid writing files into the project folder (and not into target)
if (File.class.isAssignableFrom(typeOf)
|| Path.class.isAssignableFrom(typeOf)
|| String.class.isAssignableFrom(typeOf)
|| Closeable.class.isAssignableFrom(typeOf)) {
n = FileUtil.userDirFile(StringUtil.toBase64(n)).getAbsolutePath();
if (Reader.class.isAssignableFrom(typeOf)) {
n = new StringReader(n.toString());
} else if (Writer.class.isAssignableFrom(typeOf)) {
StringWriter writer = new StringWriter();
writer.write(n.toString());
n = writer;
}
} else if (NumberUtil.isNumber(n)) {
n = convert(n, typeOf, zeroNumber, depth);
}
value = ObjectUtil.wrap(n, typeOf);
value = constructDefaultWithoutSpecificValueOrNull(typeOf, value);
} catch (Exception e) {
// here we try it without randomized values but directly creating a default instance
if (ObjectUtil.isInstanceable(typeOf)) {
try {
value = constructWithRandomParameters(typeOf, zeroNumber, depth).instance;
} catch (Exception ex) {
return null;
}
} else if (typeOf.isInterface()) {
value = createRandomProxy(typeOf, zeroNumber, depth);
} else {
// ManagedException.forward(e);
// Ok, we can't create an object, so we test with null value
return null;
}
}
if (Boolean.getBoolean(PREFIX_FUNCTIONTEST + "inject.beanattributes")) {
try {
di.inject(value);
injectTestBeanAttributes(value, zeroNumber, depth);
} catch (Exception e) {
// Ok, we cannot inject - but the value is already created, so its not a problem....
}
}
return value;
}
private static V constructDefaultWithoutSpecificValueOrNull(Class typeOf, V value) {
if (value != null && !PrimitiveUtil.isAssignableFrom(typeOf, value.getClass())) {
if (!Util.isAbstract(typeOf) && BeanClass.getBeanClass(typeOf).hasDefaultConstructor(false))
value = BeanClass.getBeanClass(typeOf).createInstance();
else // TODO: perhaps we could search an implementation through ClassFinder
value = null;
}
return value;
}
private static void injectTestBeanAttributes(V value, boolean zeroNumber, int depth) {
if (!checkMaxDepth(depth + 7) || !Boolean.getBoolean(PREFIX_FUNCTIONTEST + "inject.beanattributes")) {
return;
}
List attrs = BeanClass.getBeanClass(value.getClass()).getAttributes(true);
attrs.stream().filter(a -> a.getValue(value) == null)
.forEach(a -> a.setValue(value, createRandomValue(BeanAttribute.getExplicitType(a), zeroNumber, depth)));
}
private static Object convert(Object n, Class typeOf, boolean zeroNumber, int depth) {
if (typeOf.isAssignableFrom(n.getClass())) {
return n;
}
if (BeanClass.hasConstructor(typeOf, long.class))
n = ((Number) n).longValue(); // -> Date
else if (typeOf.equals(Class.class)) {
if (typeOf.isAnnotation())
n = ATestAnnotation.class;
else if (typeOf.isInterface())
n = ITestInterface.class;
else
n = TypeBean.class; // must be equal to the object creating (see below)
} else if (URI.class.isAssignableFrom(typeOf)) {
n = URI.create("http://localhost");
} else if (URL.class.isAssignableFrom(typeOf)) {
n = Util.trY(() -> URI.create("http://localhost").toURL());
} else if (InetAddress.class.isAssignableFrom(typeOf)) {
n = Util.trY(() -> InetAddress.getLocalHost());
} else if (InetSocketAddress.class.isAssignableFrom(typeOf)) {
n = Util.trY(() -> InetSocketAddress.createUnresolved("localhost", 0));
} else if (typeOf.isEnum()) {
if (n instanceof Number) {
n = typeOf.getEnumConstants()[((Number) n).intValue()];
} else {
throw new IllegalArgumentException(typeOf + " -> " + n);
}
} else if (Format.class.isAssignableFrom(typeOf)) {
n = new DefaultFormat();
} else if (Method.class.isAssignableFrom(typeOf)) {
n = Util.trY( () -> TypeBean.class.getMethod("getString"));
} else if (Field.class.isAssignableFrom(typeOf)) {
n = Util.trY( () -> TypeBean.class.getField("string"));
} else if (typeOf.equals(ClassLoader.class))
n = Thread.currentThread().getContextClassLoader(); // TODO: create randomly
else if (Collection.class.isAssignableFrom(typeOf))
// if (ObjectUtil.getGenericType(typeOf) != null)
// n = new ListSet<>(ObjectUtil.wrap(n, ObjectUtil.getGenericType(typeOf)));
// else
n = new ListSet<>(n);
else if (Properties.class.isAssignableFrom(typeOf))
n = MapUtil.asProperties(StringUtil.toBase64(n).replace('=', 'X'), n.toString());
else if (Map.class.isAssignableFrom(typeOf))
// if (ObjectUtil.getGenericType(typeOf, 1) != null)
// n = MapUtil.asMap(n.toString(), ObjectUtil.wrap(n, ObjectUtil.getGenericType(typeOf, 1)));
// else
n = MapUtil.asMap(StringUtil.toBase64(n).replace('=', 'X'), n);
else if (ByteUtil.isByteStream(typeOf))
n = ByteUtil.toByteStream(new byte[] {((Number) n).byteValue()}, typeOf);
else if (typeOf.isInterface() && !ObjectUtil.isStandardInterface(typeOf) && checkMaxDepth(depth))
n = createRandomProxy(typeOf, zeroNumber, ++depth);
else if (typeOf.isArray()) {
n = ObjectUtil.wrap(n, typeOf.getComponentType());
n = typeOf.getComponentType().isPrimitive() ? MapUtil.asArray(typeOf.getComponentType(), n)
: MapUtil.asArray(MapUtil.asMap(n, n), typeOf.getComponentType());
} else if (typeOf.equals(Object.class)) {
n = new TypeBean(n.toString()); //must be equals to the type of Class (see above)
} else if (!ObjectUtil.isStandardType(typeOf) && !Util.isFrameworkClass(typeOf)) {
n = typeOf.getSimpleName() + "(" + ByteUtil.hashCode(n) + ")";
}
return n;
}
static boolean checkMaxDepth(int depth) {
return depth < AFunctionCaller.def(AutoTest.CREATE_RANDDOM_MAX_DEPTH, 10);
}
public static Construction constructWithRandomParameters(Class typeOf) {
return constructWithRandomParameters(typeOf, false, 0);
}
static Construction constructWithRandomParameters(Class typeOf, boolean zeroNumber, int depth) {
try {
Constructor constructor;
Object[] parameters;
if (typeOf.isArray()) {
Object array = Array.newInstance(typeOf.getComponentType(), 1);
Array.set(array, 0, createRandomValue(typeOf.getComponentType(), zeroNumber, depth));
return new Construction(array);
} else if (hasFileConstructor(typeOf)) {
constructor = (Constructor) Util.trY( () -> typeOf.getConstructor(File.class));
parameters = new Object[] { FileUtil.userDirFile(createRandomValue(String.class, zeroNumber, depth)) };
} else {
constructor = getBestConstructor(typeOf);
if (constructor == null)
throw new RuntimeException(typeOf + " is not constructable!");
else if (constructor.getParameterCount() > 0 && !checkMaxDepth(depth))
throw new IllegalStateException("max depth reached on recursion. there is a cycle in parameter instantiation: " + typeOf);
parameters = provideRandomizedObjects(depth, 1, getParameterTypes(constructor));
}
constructor.setAccessible(true);
V instance = (V) constructor.newInstance(parameters);
try {
if (Boolean.getBoolean(PREFIX_FUNCTIONTEST + "inject.beanattributes")) {
di.inject(instance);
}
if (constructor.getParameterCount() == 0
&& Boolean.getBoolean(AutoTest.PREFIX_FUNCTIONTEST + "fillinstance"))
instance = fillRandom(instance, zeroNumber, depth);
} catch (Exception ex) {
//Ok, we do not inject in cause of problems
}
return new Construction(instance, constructor, parameters);
} catch (Exception e) {
ManagedException.forward(e);
return null;
}
}
private static Class[] getParameterTypes(Constructor c) {
// TODO implement getting parameterTypes including Generic Type info
// Class pars[] = new Class[c.getParameterCount()];
// for (int i = 0; i < c.getParameterCount(); i++) {
// pars[i] = c.getParameters()[i].getType()
// }
return c.getParameterTypes();
}
private static boolean hasFileConstructor(Class typeOf) {
String fileConstructorNames = System.getProperty(AutoTest.PREFIX_FUNCTIONTEST + "fileconstructor.classes",
FileWriter.class.getName() + ", " +
PrintWriter.class.getName() + ", " +
PrintStream.class.getName());
List fileConstructorClasses = Arrays.asList(fileConstructorNames.split("\\s*[,;]\\s*"));
return fileConstructorClasses.contains(typeOf.getName());
}
private static Constructor getBestConstructor(Class typeOf) {
Constructor[] cs = (Constructor[]) typeOf.getDeclaredConstructors();
BiFunction lowerParLength = (c, i) -> 0 < c.getParameterTypes().length
&& c.getParameterTypes().length < i;
int bestLength = Integer.MAX_VALUE;
int selection = -1;
for (int i = 0; i < cs.length; i++) {
if (lowerParLength.apply(cs[i], bestLength) && hasSimpleTypes(cs[i].getParameterTypes())) {
selection = i;
bestLength = cs[i].getParameterTypes().length;
}
}
if (selection == -1) {
for (int i = 0; i < cs.length; i++) {
if (lowerParLength.apply(cs[i], bestLength)) {
selection = i;
bestLength = cs[i].getParameterTypes().length;
}
}
if (selection == -1) {
if (BeanClass.hasDefaultConstructor(typeOf)) {
return Util.trY(() -> typeOf.getDeclaredConstructor(new Class[0]));
}
} else {
selection = 0;
}
}
return cs.length > selection ? cs[selection] : null;
}
private static boolean hasSimpleTypes(Class[] parameterTypes) {
return Arrays.stream(parameterTypes).allMatch(t -> Util.isSimpleType(t));
}
protected static Object createRandomNumber(Class typeOf) {
return createRandomNumber(typeOf, intervalOf(typeOf));
}
protected static Object createRandomNumber(Class typeOf, long interval) {
if (NumberUtil.isNumber(typeOf)) // negative only on number types
interval = interval * (Math.random() < 0.5 ? -1 : 1);
Object n = Math.random() * interval;
return n;
}
private static long intervalOf(Class typeOf) {
return NumberUtil.isNumber(typeOf) && !Number.class.equals(typeOf)
? BigDecimal.class.isAssignableFrom(typeOf)
? (long) Double.MAX_VALUE
: ((Number) BeanClass.getStatic(PrimitiveUtil.getWrapper(typeOf), "MAX_VALUE")).longValue()
: typeOf.isEnum()
? typeOf.getEnumConstants().length
: Date.class.isAssignableFrom(typeOf)
? DateUtil.MAX_DATE.getTime()
: Byte.MAX_VALUE;
}
public static Object[] provideRandomizedObjects(int countPerType, Class... types) {
return provideRandomizedObjects(0, countPerType, types);
}
public static Object[] provideRandomizedObjects(int depth, int countPerType, Class... types) {
boolean zero = countPerType == 0;
countPerType = countPerType < 1 ? 1 : countPerType;
Object[] randomObjects = new Object[countPerType * types.length];
for (int i = 0; i < countPerType; i++) {
for (int j = 0; j < types.length; j++) {
randomObjects[i+j] = createRandomValue(types[j], zero || respectZero(countPerType, i), depth);
}
}
return randomObjects;
}
// @SuppressWarnings({ "unchecked", "rawtypes" })
// public static Map provideRandomizedObjectMap(int countPerType, Class... types) {
// Map all = new LinkedHashMap<>();
// for (int i = 0; i < types.length; i++) {
// Object[] randomObjects = new Object[countPerType];
// for (int j = 0; j < countPerType; j++) {
// if (ObjectUtil.isStandardType(types[i]) || types[i].isEnum())
// randomObjects[j] = createRandomValue(types[i], respectZero(countPerType, j));
// else
// randomObjects[j] = fillRandom(BeanClass.createInstance(types[i]), respectZero(countPerType, j));
// }
// all.put(types[i], randomObjects);
// }
// return all;
// }
protected static boolean respectZero(int countPerType, int currentIndex) {
return countPerType > 2 && currentIndex == 0;
}
public static final void reset() {
valueSets.clear();
di.reset();
}
public static DependencyInjector getDependencyInjector() {
return di;
}
public static void setDependencyInjector(DependencyInjector di_) {
di = di_;
}
}
@Retention(RUNTIME)
@Target({TYPE, METHOD, PARAMETER})
@interface ATestAnnotation {
int nix();
}
interface ITestInterface {
void nix();
}
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